GB 16899-2011Safety rules for the construction and installation of escalators and moving walks (English PDF)

3.1 Terms and Definitions

For the purposes of this standard, the terms and definitions defined in GB/T 15706.1 and

Component which is connected with exterior panel and interior panel.

3.1.16

Machinery

Machinery device and its relevant equipment of escalator or moving walk.

3.1.17

Machinery spaces

Spaces for placing the whole or partial machinery inside or outside the truss.

3.1.18

Maximum capacity

Maximum personnel flow available under operating conditions.

3.1.19

Moving walk

Fixed electric drive equipment with circulating operation (panel or belt) walk, used for horizontally transporting passengers or transporting at an angle of inclination not larger than

12°.

Note: Moving walk is machinery and is incapable of being used as fixed passageway even if in non-operation state.

3.1.20

Newel

End of the balustrade.

3.1.21

Nominal speed

Operating speed of stair, pedal or belt of escalator or moving walk under no-load (for example: unmanned) condition, which is designed and determined by the manufacturer.

Note: Rated speed is the operating speed of escalators and moving walks at rated load.

3.1.22

Programmable electronic system in safety related applications for escalators and moving walks (PESSRAE)

System which is used for safety application listed in Table 6 and used for control, protection and monitoring based on programmable electronic device, including all the elements (for example: sensor and other input device, data highway and other communication path as well as actuator and other output device) in the system.

3.1.23

Rated load

Design conveying load of equipment.

Note: Maximum capacity is detailed in Appendix H.

3.1.24

Rise

Vertical distance between two floor plates at entrance/exit of escalator or moving walk.

3.1.25

Safety circuit

Partial electrical safety system composed of electrical safety devices.

3.1.26

Safety integrity level (SIL)

A discrete level which is used for specifying the safety integrity requirements of safety function distributed to PESSRAE system.

Note: In GB/T 20438, SIL1 represents the lowest level requirements, and SIL4 is the highest-level requirements (SIL3 and

SIL4 are not used in this standard).

3.1.27

Skirting

Vertical part of balustrade adjacent to stair, pedal or belt.

3.1.28

Skirt deflector

A device for reducing squeeze risk between stair and skirting.

3.1.29

Stand-by operation

A mode that escalators and moving walks stop under no-load condition or operate at a

4.4 Radiation Hazard

4.4.1 Electromagnetic radiation generated by machinery

Possible electromagnetic radiation generated during normal operation period of escalator or moving walk (see 5.11.1.2.3 and 5.12.1.2.1.5).

4.4.2 Electromagnetic radiation from outside

Low-frequency radiation, radio radiation and microwave (see 5.11.1.2.3 and 5.12.1.2.1.5).

4.5 Fire Hazard

Accumulation of combustible materials in truss, insulating materials used for cables and drive overload may generate fire hazard (see 5.2.1.4 and 5.9).

4.6 Hazard Generated by Neglecting Ergonomics Principle in Design

The following causes may result in hazardous conditions:

- - The ergonomics dimension of the user is neglected, for example: balustrade height and handrail width (see 5.5.2.1, 5.6.2 and 5.6.3);

- - Lighting of workplaces and passageways access to these locations is insufficient (see

5.8.3.1, 5.8.3.2, A.3.3 and A.3.4);

- - Space of workplaces is insufficient (see 5.8.2.1, 5.8.2.2, 5.8.2.3, A.3.5, A.3.6 and

A.3.7);

- - Heavy object lifting device is short (see 5.8.2.2 and 5.10).

4.7 Hazard Generated by Control Circuit Failure

The following causes may result in hazardous conditions:

- - No stop under hazardous conditions (see 5.11.2 and 5.12.1);

- - Short circuit (see 5.11.1.4 and 5.11.6);

- - Overload (see 5.4.1.5, 5.11.3, 5.11.5, 5.12.1 and 5.12.2);

- - Unexpected start of machinery after stop (see 5.4.1.5 and 5.12.2);

- - Unexpected inversion of drive (see 5.4.2.3 and 5.12.1);

- - Overspeed (see 5.4.2.3 and 5.12.1);

- - Too large deceleration in stop process (see 5.12.1).

4.8 Hazard Generated by Fracture or Rupture during Operation Period

Even if the escalator or moving walk is designed according to the requirements of this standard, it may also result in special hazards due to the following causes:

- - Load larger than specified user and structure load is acted on truss (see 5.2.5);

- - Load larger than the specified one is acted on balustrade (see 5.5.2.3 and 5.5.2.4);

- - Load larger than the specified one due to unforeseeable misuse is acted on stair or pedal (see 5.3.3);

- - Load larger than the specified one is acted on driving device (see 5.4.1.3, 5.4.3 and

5.4.4).

4.9 Hazard of Slipping, Tripping and Falling

The hazardous conditions of most escalators and moving walks are resulted in by personnel slipping and falling, including:

- - Slipping on stair, pedal or belt and on comb plate and floor plate (see 5.3.1, 5.5.4 and

5.7.1);

- - Falling resulted in by handrail speed deviation (including handrail pause) (see 5.6.1,

Figure G.1 and Figure G.3);

- - Falling resulted in by the change of operation direction (see 5.4.2.3);

- - Falling due to acceleration or deceleration (see 5.2.2, 5.4.1.1, 5.4.1.2, 5.4.2.1, 5.4.2.2,

5.7.2.1, 5.7.2.2, 5.7.2.3 and 5.7.2.4);

- - Falling due to unexpected start or overspeed of machinery (see 5.4.1.5);

- - Falling due to insufficient lighting at entrance/exit (see A.2.8 and A.2.9).

4.10 Specific Hazards of Such Machinery

Specific hazards of such machinery cover:

- - Stair or pedal deficiency (see 5.3.6);

- - Blocked by hand turning gear (see 5.4.1.4);

- - Convey other articles other than personnel, for example: shopping cart, baggage car or pushcart (see 7.4.1d), Figure G.4 and Appendix I);

Overhaul decking and floor plate shall be free from hole. The overhaul decking shall simultaneously meet the relevant requirements of its installation position.

5.2.5 Supporting structure design

The load pursuant in the design of supporting structure of escalator or moving walk is:

deadweight of escalator or moving walk plus 5000N/m

2 load.

Note 1: The design calculation method of the supporting structure may refer to GB 50017.

Note 2: Bearing area=nominal width z1 of escalator or moving walk (see Figure 3)×distance l 1 between two supports (see

Figure 2). The maximum deflection calculated or measured according to 5000N/m

2 load shall not be larger than 1/750 of the support distance l1 .

The maximum deflection calculated or measured according to 5000N/m

2 load shall not be larger than 1/750 of the support distance l1 .

The maximum deflection calculated or measured according to 5000N/m

2 load shall not be larger than 1/1000 of the support distance l 1 for public-transit escalators and moving walks.

5.3 Step, Pedal and Belt

5.3.1 General principles

In passenger area of the escalator, the stair tread shall be horizontal and may be allowed with ±1° deviation in operation direction.

Note: 5.3.4 and 5.7.2.1 specify the maximum allowable height difference between two adjacent stairs at entrance/exit.

The tread of escalators and moving walks shall provide a safe standing surface.

Note: Materials and test methods are detailed in Appendix J.

5.3.2 Dimensions

5.3.2.1 General principles

The nominal width z1 of escalators and moving walks shall not be less than 0.58m and shall not be larger than 1.10m. For moving walk with angle of inclination not larger than 6°, this width may be increased to 1.65m.

5.3.2.2 Stair and pedal (see cutaway view X in Figure 2 and see Figure 5)

5.3.2.2.1 Stair height x1 shall not be larger than 0.24m.

5.3.2.2.2 Stair depth y 1 shall not be less than 0.38m.

5.3.2.2.3 The stair tread and pedal surface shall be provided with tooth socket along operation direction and meshed with comb teeth.

5.3.2.2.4 The stair kickplate surface shall be made into appropriate long-tooth; the tooth profile surface shall be smooth; the front end of stair tread shall be meshed with the tooth socket of adjacent stair kickplate.

5.3.2.2.5 The width of tooth socket b 7 shall not be less than 5mm and shall not be larger than

7mm.

5.3.2.2.6 The depth of tooth socket h7 shall not be less than 10mm.

5.3.2.2.7 The tooth width b8 shall not be less than 2.5mm and shall not be larger than 5mm.

5.3.2.2.8 For stair tread, stair kickplate or pedal, the edges at both sides shall be free from tooth socket.

5.3.2.2.9 The sharp angle at the joint of stair tread and kickplate shall be eliminated.

5.3.2.3 Belt (see cutaway view X in Figure 2)

5.3.2.3.1 The belt shall be provided with tooth socket along operation direction and meshed with comb teeth.

5.3.2.3.2 The width of tooth socket b7 shall not be less than 4.5mm and shall not be larger than 7mm. This width shall be measured on belt tread.

5.3.2.3.3 The depth of tooth socket h7 shall not be less than 5mm.

5.3.2.3.4 The tooth width b8 shall not be less than 4.5mm and shall not be larger than 8mm.

This width shall be measured on belt tread.

5.3.2.3.5 The edges at both sides of the belt shall be free from tooth socket. The belt splicing shall guarantee continuous and consistent tread.

5.3.3 Structure design

5.3.3.1 General principles

In consideration of environmental factors (for example: temperature, ultraviolet rays, humidity, corrosion, etc.), the materials shall maintain their strength characteristics within the specified service life period.

Stair, pedal and belt shall be designed to be capable of bearing all the possible loads and distortion actions applied by guide rail, guiding and driving system in normal operation, and shall be capable of bearing 6000N/m

2 uniformly distributed load.

Note: 6000N/m

2 is obtained from static load 5000N/m

2 (see 5.2.5) multiplied by impact coefficient 1.2.

In order to determine the dimension of belt and its supporting system, the area of effective width multiplied by 1.0m length shall be taken as the base of above-mentioned designated load, and the requirements of 5.3.3.2.4 shall also be met.

All the spare parts (for example: embedded parts or fixed parts) for assembling stair and pedal shall be reliably connected and shall be free from looseness within the service life period.

Embedded parts and fixed parts shall be capable of bearing reacting force generated by the actuation of electrical safety devices of comb or comb plate (see g) of Table 6).

5.3.3.2 Static load test

5.3.3.2.1 Stair

Stair shall be subjected to bending resistant deformation test. The test method is to vertically apply a 3000N force (including sub-plate weight) through a steel sub-plate at the centre position of the stair tread. The area of this sub-plate shall be 0.2m×0.3m, its thickness shall be 25mm at least, and its 0.2m side shall be parallel to the stair leading edge, and its 0.3m side shall be vertical to the stair leading edge.

In the test, the deflection measured at stair tread shall not be larger than 4mm and shall be free from permanent deformation (allowable tolerance may be given).

This test shall be carried out at horizontal position (horizontal support) and maximum applicable angle of inclination (inclined support) of stair for complete stair components, including roller (no rotation), through axis or minor axis (if any).

The stairs with angle of inclination less than above-mentioned maximum angle of inclination shall not be retested; likewise, the stairs installed and completed, i.e. the stairs assembled together with escalator guide rail and truss may also not be tested.

5.3.3.2.2 Stair kickplate

When applying a 1500N force to 25cm

2 kickplate surface in normal direction through a

25mm-thick at least square or circular steel sub-plate of which the shape fits closely with kickplate arc, the kickplate deformation shall not be larger than 4mm and shall be free from permanent deformation. This load shall be applied to three positions on the centre line in kickplate width direction: middle and both ends.

5.3.3.2.3 Pedal

Pedal shall be subjected to bending resistant deformation test. The test method is to act a

7500N force (including sub-plate weight) on 1m

2 pedal area, and this force vertically acts on tread centre through a steel sub-plate; the area of this sub-plate shall be 0.30m×0.45m, its thickness shall be 25mm at least and its 0.45m side shall be parallel to the pedal side edge.

For pedal with larger or smaller area, the applied test force and load area (sub-plate) shall be of proportional change; in this case, the side ratio of load surface (sub-plate) shall be 1:1.5;

however, the vertically applied force shall not be less than 3000N (including sub-plate weight);

the sub-plate area shall not be less than 0.2m×0.3m and its thickness shall not be less than

25mm.

For the pedal with depth less than 0.30m, the sub-plate width shall be 0.20m and the sub- plate length shall be equal to the pedal depth.

In the test, the deflection measured at pedal surface shall not be larger than 4mm and shall be free from permanent deformation (allowable tolerance may be given).

This test shall be carried out at horizontal position for complete pedal, including roller (no rotation), through axis or minor axis (if any). The pedals installed and completed, i.e. the pedals assembled together with moving walk guide rail and truss shall not be tested.

5.3.3.2.4 Belt

Vertically apply a 750N force (including sub-plate weight) through a 0.15m×0.25m×0.025 steel sub-plate on the belt tensioned to operating condition; this sub-plate shall be placed in the middle position of supporting rollers at both sides and its longitudinal axis shall be parallel to the belt's longitudinal axis; in this case, the central deflection shall not be larger than 0.01z3 , herein, z3 is the transverse distance between supporting rollers (see z3 in Figure 8).

5.3.3.3 Dynamic load test

displacement with deviation less than -5%. For the test, pulsating load shall be applied through interference-free resonance force wave at any frequency between 5Hz~20Hz for 5×10

6 cycles at least.

For the pedal with depth less than 0.30m, the sub-plate width shall be 0.20m and the sub- plate length shall be equal to the pedal depth.

After the test, the pedal shall be free from crack.

The tread surface shall be free from permanent deformation larger than 4mm. Pedal or its spare parts (for example: embedded parts or fixed parts) shall be reliably connected and free from looseness.

5.3.4 Guiding of stair, pedal and belt

The lateral displacement of stair or pedal deviating from its guiding system shall not be larger than 4mm at any side and the sum measured at both sides shall not be larger than 7mm.

The vertical displacement shall not be larger than 4mm for stair and pedal and shall not be larger than 6mm for belt.

Above-mentioned requirements are only applicable to working zones of stair, pedal or belt.

Supports with spacing not larger than 2m shall be provided along belt centre line. When loading according to 5.3.3.2.4, the distance between the surface of these supports and the belt bottom surface shall not be larger than 50mm.

5.3.5 Clearance between stairs or between pedals

At any position in working zone, the clearance measured from tread between two adjacent stairs or two adjacent pedals shall not be larger than 6mm (see partial view Y and partial view

Z in Figure 2, partial view S and partial view T in Figure 6 as well as partial view U in Figure

7).

Demarcation (for example: groove on stair tread) which features the stair trailing edge shall be provided at entrance/exit.

In transition curve zone of moving walk, if the pedal leading edge is meshed with trailing edge of adjacent pedal, the clearance may be increased to 8mm (see partial view V in Figure 7).

5.3.6 Monitoring device for stair or pedal deficiency

Escalators and moving walks shall be capable of detecting the deficiency of stair or pedal through the devices installed at driving station and reversing station (see k) of Table 6) and shall stop before notch (resulted in by stair or pedal deficiency) appearance from comb position.

5.4 Driving Device

5.4.1 Driving host

5.4.1.1 General principles

One driving host shall not drive more than one escalator or moving walk.

5.4.1.2 Speed

5.4.1.2.1 Under rated frequency and rated voltage, the maximum allowable deviation between the speed measured at no-load of stair, pedal or belt along operation direction and the nominal speed shall be ±5%.

5.4.1.2.2 The nominal speed of the escalator shall not be larger than:

- 0.75m/s when the angle of inclination alpha of the escalator is not larger than 30°;

- 0.50m/s when the angle of inclination alpha of the escalator is larger than 30° but not larger than 35°.

5.4.1.2.3 The nominal speed of moving walk shall not be larger than 0.75m/s.

If the pedal or belt width is not larger than 1.10m, and the horizontal distance before pedal or belt at entrance/exit entering into comb is not less than 1.60m, the maximum nominal speed of moving walk may be allowed to reach 0.90m/s.

Above-mentioned requirements are not applicable to the moving walk with acceleration zone or the moving walk which is capable of directly transiting to different speeds for operation.

5.4.1.3 Connection between service brake and stair, pedal or belt driving device

5.4.1.3.1 The connection between service brake and stair, pedal or belt driving device shall adopt non-friction driving elements in priority, for example: axis, gear, multi-strand chain and two or more single-strand chains. If friction element, for example: triangular driving belt (flat belt is not allowed) is adopted, one additional brake meeting the requirements of 5.4.2.2 shall be adopted.

5.4.1.3.2 The safety coefficient of all the driving elements for static calculation shall not be less than 5. If triangular driving belt is adopted, the belts shall be 3 at least.

Above-mentioned safety coefficient is the ratio of breaking force of driving element and static force of driving element; static force refers to the load of 5000N/m

2 specified in 5.2.5, borne by escalator or inclined moving walk, and tensile force generated by tension device.

For horizontal moving walk, the safety coefficient shall be determined according to the dynamic load generated in order to meet the requirements of 5.4.2.1.3.4 under brake load of

5.4.2.1.3.3 and the tensile force generated by tension device.

5.4.1.4 Hand turning gear

If hand turning gear is provided, this gear shall be easy to use and safely operate (the requirements of operation instruction are detailed in 7.2.1.3 and 7.4.1g)).

For dismountable hand turning gear, one electrical safety device meeting the requirements of 5.12.1.2.2 (see q) of Table 6) shall operate before or during hand turning gear is installed with driving host.

Crank or porous hand wheel shall not be adopted.

5.4.1.5 Shutdown and stop state check

5.4.1.5.1 The stop of escalator or moving walk through electrical safety devices meeting the requirements of 5.12.1.2 shall meet the requirements of 5.4.1.5.2 and 5.4.1.5.3.

5.4.1.5.2 AC or DC motor is directly powered by power supply

The power supply shall be cut off by two independent contactors, and the contacts of these contactors shall be connected in series in power supply circuit. When escalator or moving walk stops, if the main contact of any contactor therein is not opened, the escalator or moving walk shall be incapable of being restarted;

5.4.1.5.3 When AC or DC motor is powered and controlled by static element, the following a) or b) method shall be adopted:

a) Two independent contactors cut off the motor current.

When escalator or moving walk stops, if the main contact of any contactor therein is not opened, the escalator or moving walk shall be incapable of being restarted;

b) One system composed of the following elements:

1) Contactor cutting off each phase (polarity) current. When escalator or moving walk stops, if the contactor is not released, the escalator or moving walk shall be incapable of being restarted;

2) Control device for blocking current flow in static element;

3) Monitoring device for inspecting blocking condition of current flow at each stop of escalator or moving walk. In normal stop period, if the static element fails to effectively block the current, the monitoring device shall make the contactor release and shall prevent escalator or moving walk restarting.

5.4.2 Brake system

5.4.2.1 Service brake

5.4.2.1.1 General principles

5.4.2.1.1.1 Escalators and moving walks shall be arranged one brake system which makes escalators and moving walks have a brake process approximate to uniform deceleration until shutdown and make them maintain stop state (service braking), see 5.12.1.2.4. The brake system shall be free from delay on purpose in service process.

If the brake distance exceeds 1.2 times the maximum value specified in 5.4.2.1.3.2 and

5.4.2.1.3.4, the escalators and moving walks shall be restarted only after fault lock reset (see o) of Table 6). If necessary, the brake system shall be checked before manual reset, and corrective measures shall be taken (see e) of 7.4.1).

After escalator and moving walk start, one device shall be provided (see l) of Table 6) to monitor the release of the brake system.

5.4.2.1.1.2 The brake system shall be capable of automatically working under the following conditions:

a) Power source power-off;

5.4.2.3.1 Escalators and moving walks shall automatically stop operation before the speed exceeding 1.2 times the nominal speed (see c) of Table 6). If speed limit device is adopted, this device shall be capable of cutting off the power supply of escalator or moving walk before the speed exceeding 1.2 times the nominal speed.

If the design of escalator or moving walk is capable of preventing overspeed, above- mentioned requirements may not be considered.

5.4.2.3.2 Escalator and inclined moving walk with alpha>=6° shall be arranged with one device to automatically stop operation when stair, pedal or belt changes the specified operation direction (see c) of Table 6).

5.4.3 Driving of stair and pedal

5.4.3.1 The escalator stair shall be driven by two chains at least, and each side of the stair shall not be less than one chain.

If the parallel movement of moving walk pedal in working zone is guaranteed through other mechanical method, one chain may be allowed for driving.

5.4.3.2 The stair chain shall be designed according to nominal infinite fatigue life.

The safety coefficient of each chain shall not be less than 5 (see 5.4.1.3.2) and the materials shall meet the requirements of GB/T 699, GB/T 700, GB/T 1591, GB/T 3077, GB/T 4171 or

GB/T 16270. The stair chain shall be subjected to tensile test.

When more than one chain is used, each chain may be assumed to averagely bear the load.

5.4.3.3 The chain shall be capable of continuously tensioning. Escalators and moving walks shall automatically stop operation before the movement of tension device exceeding ±20mm (see e) and f) of Table 6). Extension spring shall not be as tension device. If heavy block is adopted for tensioning, the heavy block shall be capable of being intercepted safely once suspension device breaks.

5.4.4 Driving of belt

5.4.4.1 The safety coefficient of belt and its joint calculated according to dynamic load determined in 5.4.2.1.3.3 and 5.4.2.1.3.4 shall not be less than 5 (see 4.1.3.2). It shall be calculated according to the most unfavourable operating conditions.

5.4.4.2 The belt shall be driven by drum and shall be capable of continuously and automatically tensioning, and extension spring shall not be adopted as tension device. If heavy block is adopted for tensioning, the heavy block shall be capable of being intercepted safely once suspension device breaks.

5.5 Balustrade

5.5.1 General principles

Balustrades shall be installed at both sides of escalator or moving walk.

5.5.2 Dimension of balustrade

5.5.2.1 The vertical distance h 1 from handrail top surface to stair leading edge or pedal surface or belt surface shall not be less than 0.90m and shall not be larger than 1.10m (see Figure 2 and

Figure 3).

5.5.2.2 Balustrade shall be free from any position for normal standing of personnel.

If the risk of personnel falling exists, adequate measures shall be taken to prevent personnel climbing up balustrade outside.

In order to ensure this, anti-creep device shall be installed on lower outer decking of escalators and moving walks (see 1 in Figure 4) and shall be located above the ground level (1000±50)mm (see h 9 in Figure 4), and its lower part shall intersect with the lower outer decking;

the extension length l5 parallel to lower outer decking direction shall not be less than 1000mm and shall ensure no step within this length range. The height of this device shall be flush with handrail surface at least and meet the requirements of b 10 and b 12 (see Figure A.1 and Figure 3).

When escalator or moving walk is adjacent to wall and the width b 13 of lower outer decking is larger than 125mm, retention devices shall be installed at upper and lower ends (see 2 in

Figure 2) to prevent personnel entering into lower outer decking area. When escalators or moving walks are of adjacent and parallel arrangement and the width b14 of sharing lower outer decking is larger than 125mm, such retention device shall also be installed. This device shall be extended to the height h10.

The head of exposed fasteners for installing above-mentioned devices shall be of unconventional type.

When balustrade decking approximate to handrail height is equipped between escalator or inclined moving walk and adjacent wall and the distance b15 between building (wall) and handrail centre line is larger than 300mm, anti-slip device shall be installed on balustrade decking (see 3 in Figure 4). This device shall include components fixed to the balustrade decking, and the distance with the handrail shall not be less than 100mm (see b17 ), and the spacing distance between anti-slip devices shall not be larger than 1800mm and the height h 11 shall not be less than 20mm. This device shall be free from sharp angle or sharp edge.

For adjacent escalator or inclined moving walk, when the distance b 16 between handrail centre lines is larger than 400mm, above-mentioned requirements shall also be met.

5.5.2.3 The balustrade shall be capable of simultaneously bearing static 600N lateral force and 730N vertical force which are uniformly distributed at 1m length of the identical position at the top of handrail guiding system.

5.5.2.4 The balustrade part orientated to one side of stair, pedal or belt shall be smooth and flush. If the installation direction of batten or panel is inconsistent with the operation direction, the convexity shall not be larger than 3mm, and the batten or panel shall be solid and provided with round angle or chamfer angle edge. Such batten or panel shall not be installed on skirting.

The structure at the joint of decking along operation direction (especially the joint between skirting and interior panel) shall eliminate stumbling risk.

The clearance between interior panels shall not be larger than 4mm and the edge shall be of round angle or chamfer angle shape.

When vertically applying a 500N force to act on 25cm

2 area in any position of interior panel surface, gap larger than 4mm and permanent deformation shall not be allowed.

If interior panel is made of glass, such glass shall be toughened glass. The thickness of single-layer glass shall not be less than 6mm. When multi-layer glass is adopted, it shall be laminated toughened glass and the thickness of one layer at least shall not be less than 6mm.

5.5.2.5 The horizontal distance between points of lower parts of two interior panels (measured vertical to operation direction) shall not be larger than the horizontal distance between corresponding points of upper parts.

5.5.2.6 The angle of inclination gamma of lower inner decking and interior panel and horizontal plane shall not be less than 25° (see Figure 3). This requirement is not applicable to the horizontal part of lower inner decking directly connected with interior panel (see b 4 in Figure

3).

5.5.2.6.1 Horizontal part b4 (up to interior panel) shall be less than 30mm.

5.5.2.6.2 For each lower inner decking with an angle of inclination with horizontal plane less than 45°, the width b3 measured along horizontal direction shall be less than 0.12m (see Figure

3).

5.5.3 Skirting

5.5.3.1 Skirting shall be vertical, smooth and of butt joint.

Note: For long-distance moving walk, other special connection methods (for example: slip joint) may be taken at the seam of skirting crossing building expansion joint to replace butt joint.

5.5.3.2 The vertical distance h2 between the connecting line of skirting upper edge or broken line bottom of lower inner decking or bottom of rigid part of skirt deflector (see 3.1.28 for its definition) and pedal or belt tread shall not be less than 25mm (see Figure 3).

5.5.3.3 When vertically applying a 1500N force to 25cm

2 square or circular area at the most unfavourable position of the skirting, the depression shall not be larger than 4mm, and permanent deformation shall not be resulted in thereby.

5.5.3.4 For escalator, the entrapment possibility between stair and skirting shall be reduced.

Therefore, the following four conditions shall be met:

a) The skirting rigidity shall meet the requirements of 5.5.3.3;

b) The clearance shall meet the requirements of 5.5.5.1;

c) The skirt deflector meeting the following requirements shall be installed (see Figure

1):

1) Composed of rigid and flexible components (for example: hairbrush and rubber

5.5.4 Newel

5.5.4.1 The newel including handrail shall not be less than 0.60m from the longitudinal horizontal distance of the intersecting line of comb teeth and tread (see L 2 and l 2 of Figure 2 and cutaway view X).

5.5.4.2 At entrance/exit, extension length l3 (see Figure 2) of handrail horizontal component

from the intersecting line of comb teeth and tread (see L 2 in cutaway view X of Figure 2) shall not be less than 0.30m.

For inclined moving walk, if horizontal zone is not arranged at entrance/exit, the angle of inclination of its handrail extension may be identical to the angle of inclination of moving walk.

5.5.5 Clearance between stair, pedal or belt and skirting

5.5.5.1 Skirting of escalator or moving walk shall be arranged at both sides of stair, pedal or belt; horizontal clearance of any side shall not be larger than 4mm; the sum of clearances measured at lateral symmetry locations shall not be larger than 7mm.

5.5.5.2 If the skirting of moving walk locates at place over pedal or belt then the measured vertical clearance between tread and lower end of skirting shall not be larger than 4mm. Lateral oscillation of pedal or belt shall not produce clearance between side edge of pedal or belt and vertical projection of skirting.

5.6 Handrail System

5.6.1 General principles

Each balustrade shall be equipped with operating handrail at its top; its operation direction shall be identical with that of stair, pedal or belt. Under normal operation condition, the allowable tolerance of handrail running speed relative to the actual speed of stair, pedal or belt is 0% ~+2%.

Speed monitoring device for handrail shall be provided [see m) of Table 6]; during operation of escalator and moving walk, when the handrail speed deviates more than -15% from the actual speed of stair, pedal or belt for more than 15s, this device shall stop the operation of escalator or moving walk.

5.6.2 Section shape and location of handrail

5.6.2.1 The handrail section of balustrade and the shaped assembly of its guide rail shall not squeeze finger or hand.

The distance between handrail opening and guide rail or handrail bracket shall not be larger than 8mm in any case (see b6' and b6" in cutaway view W of Figure 3).

5.6.2.2 Handrail width b2 shall be between 70mm and 100mm (see cutaway view W of Figure

3).

5.6.2.3 The distance b 5 between handrail and balustrade edge shall not be larger than 50mm (see Figure 3).

5.6.3 Distance between handrail centre lines.

The distance b 1 between handrail centre lines shall not be 0.45m larger than the distance between skirtings (see b 1 and z2 of Figure 3).

5.6.4 Handrail entrance

5.6.4.1 The distance h 3 between the minimum point of handrail at the entrance of newel and floorboard shall not be less than 0.10m nor larger than 0.25m (see Figure 2 and Figure 3).

5.6.4.2 The horizontal distance l 4 between newel peak and the entrance of handrail shall not be less than 0.30m (see Figure 2). If l 4 >(l 2 -l3 +50mm), the included angle of handrail and horizontal direction shall not be less than 20° when handrail enters into balustrade.

5.6.4.3 Protection device for finger and hand shall be arranged at the handrail entrance of newel and a safety device meeting those specified in i) of Table 6 shall be arranged.

5.6.5 Guiding

Guiding and tensioning of handrail shall be able to make the handrail not separating from guide rail of handrail at normal working.

5.7 Entrance/Exit

5.7.1 Surface characteristic

Escalators and moving walks shall be provided with a safe standing surface [except for comb (see 5.7.3)] at the entrance/exit area (for example: comb plate and floor plate); the measured depth distance of this surface from comb root shall not be less than 0.85m (see L 1 and cutaway view X of Figure 2).

Note: Material and test method, see Appendix J.

5.7.2 Locations of stair, pedal and belt

5.7.2.1 Escalator stair shall be provided with guiding at entrance/exit so that the stair front from the comb and the stair trailing edge is provided with a horizontal displacement not less than 0.8m. Measurement for this distance shall be started from L 1 (see Figure 2 and cutaway view X).

If the nominal speed is larger than 0.50m/s but not larger than 0.65m/s or the rise h 13 is larger than 6m, this horizontal displacement shall not be less than 1.2m and the measurement of this distance shall be started from L1 (see Figure 2 and cutaway view X).

If the nominal speed is larger than 0.65m/s, the horizontal displacement shall not be less than 1.6m; the measurement of this distance shall be started from L 1 (see Figure 2 and cutaway view X).

In horizontal movement zone, maximum allowance height difference between two adjacent stairs is 4mm.

5.7.2.2 The curvature radius of escalator from inclined zone to upper horizontal zone shall meet the following requirements:

- - When nominal speed V<=0.5m/s, not less than 1.00m (maximum angle of inclination is 35°);

- - When nominal speed 0.5m/s<V<=0.65m/s, not less than 1.50m (maximum angle of inclination is 30°);

- - When nominal speed V>0.65m/s, not less than 2.60m (maximum angle of inclination is 30°);

When nominal speed is not larger than 0.65m/s, the curvature radius of escalator from inclined zone to lower horizontal zone shall not be less than 1.00m; when nominal speed is larger than 0.65m/s, this curvature radius shall not be less than 2.00m.

5.7.2.3 The curvature radius of belt moving walk transiting from inclined zone to horizontal zone shall not be less than 0.4m.

In consideration of the maximum allowable clearance between two adjacent pedals (see

5.3.5), the curvature radius is always large enough, therefore, pedal moving walk need not to be specified of curvature radius.

5.7.2.4 For maximum moving walk with its angle of inclination larger than 6°, the pedal or belt of its upper part entrance/exit shall be provided with a not less than 0.4m displacement whose maximum angle of inclination is 6° before entering into comb or after leaving comb.

Pedal moving walk shall be provided with as following horizontal entrance distances similar to those specified in 5.7.2.1:

The pedal front departing from comb and the pedal trailing edge entering into comb shall be provided with a not less than 0.4m displacement without changed angle.

5.7.2.5 Measures shall be taken at comb zone to ensure the comb teeth and the tread correctly mesh (see 5.7.3.3).

Belt in this zone shall adopt proper method for support, for example, drum, trolley wheel and sliding plate.

If comb meshing is no longer ensured because of sinking of any part of stair or pedal, a safety device meeting those specified in j) of Table 6 shall stop the operation of escalator or moving walk. This safety device shall be arranged in front of each transitional arc segment so as to guarantee adequate distance before the sunken stair or pedal reaching the intersecting line of comb teeth and tread (see brake distance specified in 5.4.2.1.3.2 and 5.4.2.1.3.4). This monitoring device may monitor any position of stair or pedal.

5.7.3 Comb

5.7.3.1 General principles

Comb shall be installed at the entrance/exit of the both ends for the convenience of user in and out. Comb shall be easy of being replaced.

5.7.3.2 Design

5.7.3.2.1 The comb teeth of comb and tooth socket of stair, pedal or belt shall mesh (see branching cable connected to the place in front of the power supply main switch of escalator or moving walk. Power supply of electrical lighting installation and power socket shall be able to cut off power supply of each phase with an independent switch (see 5.11.4.1).

5.8.3.2 Electrical lighting installations of machinery spaces, driving station and reversing

station in truss shall be standing handheld portable lamp. Handheld portable lamp may be arranged at a place in driving station, reversing station or machinery spaces. One or more power sockets shall be provided at each of these places.

Illumination at working area shall be at least 200lx.

5.8.3.3 Socket shall be:

a) 2P+PE type (2 poles + earth wire), 250 V, direct power supply from main power supply; or b) Type of safety extra-low voltage power supply that meet those specified in GB

16895.21.

5.8.4 Stop switch for maintenance and repair use

Both driving station and reversing station shall be equipped with stop switches.

As for escalators and moving walks whose driving devices are installed at the place between carrying branch and carrying branch of stair, pedal or belt or the place outside the reversing station, another stop switch shall be arranged near the driving device.

Action of stop switch shall be capable of cutting off the power supply of driving host and braking the service brake and effectively stopping the operation of escalator or moving walk.

The stop switch shall meet the requirements of GB 16754 and achieve 0 type stop.

The action of stop switch shall be capable of preventing escalator or moving walk from starting.

Stop switch shall be provided with distinct and permanent marks at open and turn off positions.

Special circumstance: if machinery spaces are equipped with main switches that meet

5.11.4, then stop switch is not required to be arranged.

5.9 Fire Protection

Special requirements in aspects of fire prevention and building are not stated in this standard. However, it is recommended that the escalators and moving walks shall adopt material not producing extraneous risks in fire as much as possible.

Material for lower outer decking and lower inner decking, truss, stair and pedal and guide rail system shall be at least meet the Grade C requirement specified in 10.5 of GB 8624-2006.

5.10 Transport

Completely assembled escalator or moving walk or components incapable of being carried by labour of escalator or moving walk shall meet one of the following requirements:

a) Be equipped with connection accessory for transport by lifting device or devices for transport;

b) A connecting piece designed for lifting (for example, screwed hole);

c) A kind of device designed for convenience of lifting by lifting device and other transport tools.

5.11.1.2.2 This standard does not refer to the requirements for the switch input terminal power supply and the power supply for the lighting of machinery spaces, driving station and reversing station mentioned in 5.11.1.2.1.

5.11.1.2.3 Electromagnetic compatibility should meet the specifications of GB/T 24807 and

GB/T 24808.

5.11.1.3 Protection against direct contact

Protection against direct contact shall meet the specifications in 6.2 of GB 5226.1-2008.

5.11.1.4 Detection of insulation resistance

Insulation resistance between conductors and that between conductor and earth shall meet the specifications in 18.3 of GB 5226.1-2008.

5.11.1.5 Voltage limit of control circuit and safety circuit

For control circuit and safety circuit, the effective value of DC voltage value or ac voltage between conductor conductors or that from conductor to earth shall not be larger than 250V.

5.11.1.6 Neutral conductor and earthing conductor

Shall meet those specified in Chapter 8 of GB/T 5226.1-2008.

5.11.2 Contactor, contactor relay, fail safety circuit element

5.11.2.1 Contactor and contactor relay

5.11.2.1.1 For the purpose of stopping the driving host (see 5.12.1.2.4), main contactor shall belong to the following categories specified in GB 14048.4.

a) AC-3, Used for AC motor;

b) DC-3, Used for DC unit.

5.11.2.1.2 Contactor relay (see 5.12.1.2.4) shall belong to the following categories specified in GB 14048.5.

a) AC-15, used for AC control circuit;

b) DC-13, used for DC control circuit.

5.11.2.1.3 As for main contactor (see 5.11.2.1.1) and Contactor relay (see 5.11.2.1.2), in measures adopted for meeting the requirements, it may be assumed that:

a) If one break contact (normally closed contact) close then all make contacts disconnect;

b) If one makes contact (normally open contact) close then all break contacts disconnect.

5.11.2.2 Fail safety circuit element

5.11.2.2.1 When devices meeting those specified in 5.11.2.1.2 are taken as electric relay electric relay of failed safety circuit, the assumption of 5.11.2.1.3 shall also be applicable.

5.11.2.2.2 If the break contact and the make contact of the adopted relay are unable to close at the same time no matter the armature iron is located in any position then the possibility of armature iron incomplete attraction may be excluded from consideration [see 5.12.1.1.2 f)].

5.11.2.2.3 The device connected to the back of the electrical safety device shall meet the specifications in regard to creep distance and electric clearance of 5.12.1.2.2.3 (without regard to disjunction distance).

This requirement is not applicable to devices mentioned in 5.11.2.1.

5.11.3 Protection of motor

5.11.3.1 Motor directly connected to power supply shall be subjected to short-circuit protection.

5.11.3.2 Motor directly connected to power supply shall adopt hand-reset automatic breaker for overload protection (except for that meet the requirements of 5.11.3.3); this breaker shall cut off all the power supply of motor (see GB 14048.4).

5.11.3.3 When the overload detection depends on the temperature rise of motor winding then the protection device may automatically close after the sufficient cooling of winding. However, only under the specified conditions in 5.12.2.1, escalator or moving walk are possibly be restarted.

5.11.3.4 If the motor is provided with winding of many different circuits, 5.11.3.2 and 5.11.3.3 are suitable for each winding.

5.11.3.5 When power supply of driving motor of escalator or moving walk is motor driven motor driven DC generator, the driving motor of electrical generator shall be arranged with overload protection.

5.11.4 Main switch

5.11.4.1 A main switch that is capable of cutting off the power supply of motor, brake releasing device and control circuit at driving host vicinity, in the reversing station or near the control device.

This switch shall not cut off power supply of power socket lighting circuit required for check and maintenance (see 5.8.3).

Auxiliary equipment (for example, heating devices, handrail lighting and comb lighting) with respective independent power supply shall be able to be cut independently. Each corresponding switch shall be situated near the main switch and provided with obvious mark.

5.11.4.2 Main switch defined in 5.11.4.1 shall be able to be locked with padlock or other equivalent methods or located in "separation" position so as to guarantee that mis-operation will not occur (see 5.3.3 of GB 5226.1-2008). Control mechanism of main switch shall be capable of being manipulated rapidly and conveniently after opening door or trapdoor.

5.11.4.3 Main switch shall be provided with capacity for cutting off the maximum current of escalator or moving walk in normal use and shall meet the specifications of Chapter 5 of GB

5226.1-2008.

5.11.4.4 If each main switch of several escalators or moving walks are arranged in a machinery space, then main switch of each escalator or moving walk shall be easy of being identified.

5.11.5 Electric wiring

5.11.5.1 General principles

5.11.5.1.1 Wire and cable shall be adopted in accordance with national standard, its quality shall at least equivalent to the specifications of GB/T 5013.4, GB/T 5023.3, GB/T 5023.4 and

GB/T 5023.5.

5.11.5.1.2 The wire whose quality is equivalent to those specified in Chapter 2 [60227 IEC

01 (BV)], Chapter 3 [60227 IEC 02 (RV)], Chapter 4 [60227 IEC 05 (BV)] and Chapter 5

[60227 IEC 06 (RV)] of GB/T5023.3-2008 is only allowed to be placed in conduit, wire groove or similar device with equivalent protective action. If it has difference with those specified in

GB/T 5023.3, the nominal sectional area of wire shall not be less than 0.75mm

5.11.5.1.3 Sheathed cable whose quality is not lower than those specified in Chapter 2 of

GB/T5023.4- 2008 is allowed to be opening laid on wall or placed in conduit, wire groove or similar devices.

5.11.5.1.4 Ordinary flexible cable whose quality is equivalent to those specified in Chapter 3

[60245 IEC 53 (YZ)] of GB/T5013.4-2008 and Chapter 6 [60227 IEC 53 (RVV)] of

GB/T5023.5-2008 is only allowed to be placed in conduit, wire groove or similar devices with equivalent protection function or at not easy to be accident damaged position in truss.

Heavy sheathed flexible cable that meet those specified in Chapter 5 of GB/T5013.4-2008 is allowed to be fixing installed under the specified conditions of 5.11.5.1.3; it may also be used to occasions connecting mobile device and easy to be vibrated.

5.11.5.1.5 Wiring of control or distribution equipment in control cabinet or on control panel is not required to meet the specifications of 5.11.5.1.2, 5.11.5.1.3 and 5.11.5.1.4, but for the following a) or b), the specifications in 7.8 of GB 7251.1- 2005 shall be met.

a) Wiring between different devices in electrical equipment;

b) Wiring between these devices and connecting terminal.

5.11.5.2 Wire sectional area

In order to guarantee adequate mechanical strength, the nominal sectional area of safety circuit wire shall not be less than 0.75mm

5.11.5.3 Installation method

5.11.5.3.1 Necessary and easy of being understood description shall be provided along with electrical equipment.

5.11.5.3.2 After disconnecting the main switch or other switches of escalator or moving walk, if some connecting terminals are still charged then they shall be obviously separated from non- charged terminals; and the one whose voltage larger than 50V shall be appropriately marked.

Above-mentioned situation shall also meet the specifications in 5.3.5 and 16.2 of GB specifications of Appendix B.

5.12.1.2.1.3 Interior and exterior inductance or influence of electric capacity shall not cause failure of fail safety circuit.

5.12.1.2.1.4 Output signal from fail safety circuit shall not be altered by external signal generated by the subsequent another electrical device arranged in the same circuit for fear that hazard consequence be caused.

5.12.1.2.1.5 The structure and arrangement of internal power source device shall prevent signal goes wrong at output terminal of electrical safety device because of switching action.

The voltage peak caused by running of escalator or moving walk or other equipment of power grid shall not produce un-allowed interfere (noise immunity) to electronic element. The relevant requirements of GB/T 24807 and GB/T 24808 should be met.

5.12.1.2.2 Safety switch

5.12.1.2.2.1 The action of safety switch shall forcibly machinery disconnect its contacts; even two contacts welded together also shall be forcibly machinery disconnected.

When all the off-contact elements are located in off position, and there is no elastic element (for example: springs) between moving contact and driving mechanism within the effective travel, namely contact being forcibly machinery disconnected.

Short circuit hazard caused by component fault shall be reduced in design as much as possible.

5.12.1.2.2.2 If the degree of protection for protective casing of safety switch is not lower than

IP 4X (in accordance with the requirements of GB 4208) then the safety switch shall be able to bear rated insulation voltage of 250V. If its enclosure protection degree is less than IP 4X then it shall be able to bear rated insulation voltage of 500 V.

Safety switch shall belong to the following categories specified in GB 14048.5:

a) AC-15, used for AC circuit;

b) DC-13, used for DC circuit.

5.12.1.2.2.3 When the enclosure protection degree is less than IP4X, its electric clearance shall not be less than 3mm and the creepage distance shall not be less than 4mm. The distance between contacts after disconnecting shall not be less than 4mm.

5.12.1.2.2.4 For situation of many disconnecting points, after disconnecting the distance between contacts shall not be less than 2mm.

5.12.1.2.2.5 Abrasive dust of conducting material shall not lead to short circuit of contact.

5.12.1.2.3 Fail safety circuit

5.12.1.2.3.1 Any fault stated in 5.12.1.1 shall not lead to generation of hazardous condition.

5.12.1.2.3.2 The following conditions are suitable for the faults stated in 5.12.1.1:

If the combination of one fault and the second fault might lead to hazardous condition then escalator or moving walk shall be made out of service at the latest when the fault element participates in the next operation procedure.

Before escalator or moving walk stops running in accordance with the above-mentioned procedure, the possibility that the second fault leading to hazardous condition shall be excluded from consideration.

If the element failure leading to the first fault is incapable of being detected out under state change then appropriate measures shall be taken to guarantee that this fault may be detected out, and escalators and moving walks shall be prevented from operating at the latest when restarting in accordance with 5.12.2.4.

MTBF of the fail safety circuit (spacing working time for average failure) shall not be less than 2.5 years. The base for determining this time is to assume that each escalator or moving walk is restarted in accordance with 5.12.2.4 for at least one time in three months, namely to experience one state change.

5.12.1.2.3.3 If the combination of two faults and the third fault might lead to hazardous condition then escalator or moving walk shall be made out of service at the latest when any one of the two fault elements participates in the next operation procedure.

Before escalator or moving walk stops running in accordance with the above-mentioned procedure, the possibility that the third fault leading to hazardous condition shall be excluded of escalator or moving walk, then the escalator or moving walk shall be put into service [see 7.4.1 e)].

5.12.2.1.2 For escalator or moving walk automatic starting or accelerating by entering of user (stand-by operation), when user arriving at the intersecting line of comb teeth and tread, it shall run in not less than 0.2 times the nominal speed, then accelerate in less than 0.5m/s

Note: The average travel speed of pedestrian taken into account is 1m/s.

Shall meet the requirements of 5.12.1.1

In order to prevent the user from avoiding control element, measures might be required to be taken in buildings.

5.12.2.1.3 The operation direction of escalator or moving walk which is automatically started by entering of the user shall be set in advance and marked obviously and visibly (see 7.2.2).

On the automatic starting escalator or moving walk by entering of the user, if the user is able to enter from the reverse direction of the scheduled operation direction, the escalator or moving walk shall still be started in accordance with the pre-set direction and meet the requirements of 5.12.2.1.2. Operation time shall be at least 10s.

5.12.2.2 Out of service

5.12.2.2.1 Out of service by manual operation

Before being out of service, the personnel to operate the switch shall ensure that no person is using the escalator or moving walk before operation. The remote stop device shall also meet the requirements above.

5.12.2.2.2 Out of service by automatic operation

The control system shall make the escalator or moving walk stop automatically when the users start the control element stated in 5.12.2.1.2 for an adequate time (at least the expected time when the users are conveyed plus 10s).

5.12.2.2.3 Emergency stop switch by manual operation

5.12.2.2.3.1 The escalator or moving walk shall have the emergency stop switch which makes the escalator or moving walk stop in case of emergency. The emergency stop switch shall be fixed nearby the entrance/exit of escalator or moving walk and the obvious place where it is easy to be accessed (the requirements of appearance design are detailed in 7.2.1.2.2).

The distance between emergency stop switches shall meet the following requirements:

- - For escalator, the distance shall not be larger than 30m;

- - For moving walk, the distance shall not be larger than 40m.

To ensure the requirements for the distance above, the additional emergency stop switches shall be equipped if necessary.

See Appendix I.2 for the moving walk used for conveying the shopping cart and baggage car.

5.12.2.2.3.2 The emergency stop switch shall be the electrical safety device in conformity with the requirements in 5.12.1.2.

Note: The devices in conformity with GB 16754 are not necessarily in conformity with the functional requirements in

5.12.2.2.3 concerning stop switch. Due to the special safety purpose of escalators and moving walks, the definition of emergency stop switch is different from the requirements of GB 16754.

5.12.2.2.4 Out of service triggered by monitoring device or electrical safety devices (see

5.12.1.2.1.1)

5.12.2.2.4.1 When such events detected by monitoring device or electrical safety devices (or function) listed in Table 6 happen, the driving host shall not be started or stopped immediately (see 5.12.2.4) before restarting according to 5.12.2.4.

The requirements related to monitoring device and electrical safety devices (or function) are detailed in Table 6.

Table 6 The Requirements of Monitoring Device and Electrical Safety Devices (or Function) (Continued)

5.12.2.2.4.2 Disconnection of executive device of monitoring device and electrical safety devices in safety circuit (such as overhaul control device shall meet the requirements of

Appendix B.

5.12.2.3 Switch of operation direction

The operation direction shall not be switched until the escalator or moving walk is out of service and in conformity with the requirements of 5.12.2.1.1, 5.12.2.1.2, 5.12.2.1.3 and

5.12.2.2.2.

5.12.2.4 Restarting

5.12.2.4.1 Restart by switch

After being out of service every time (5.12.2.2.1, 5.12.2.2.3 and 5.12.2.2.4), restart only by the switches specified in 5.12.2.1 or the overhaul control device specified in 5.12.2.5 except those specified in 5.12.2.2.2. Attention shall be drawn: restart only after the fault lock is reset manually under the conditions specified in a), c), e), j), k), l), o), p) and q) in Table 6.

The reason shall be found before manual reset, inspect the stop device and take the necessary correction measures if necessary.

The fault locking shall remain effective always even if power-off or power-on.

5.12.2.4.2 Reuse of automatic restart

If the stopping is carried out by emergency stop switch in conformity with those specified in 5.12.2.2.3, the escalator or moving walk may reuse automatic restart instead of switches above under the conditions below:

a) Monitor stair, pedal or belt in the intersecting line between comb teeth and tread at both ends, including the additional distance 0.30m outside the line and the reuse of automatic restart is effective only when this area is free from any person and objects.

This device shall detect the non-transparent right circular cylinders which is 0.30m in diameter and 0.30m in height at any position in this area;

b) According to 5.12.2.1.2, the escalator or moving walk starts when the users enter.

The starting is effective when the monitoring device does not detect the persons or objects in a specified segment for at least 10s;

c) Those who control the reuse of automatic restart shall be electrical safety devices in conformity with 5.12.1.2 and the self-checking sensor element allows the design of single pass.

5.12.2.5 Overhaul control

5.12.2.5.1 The escalator or moving walk shall be equipped with overhaul control device for convenience of application of portable manually-operated control device in maintenance, repair and check.

5.12.2.5.2 For this purpose, each entrance/exit (such as driving station and reversing station in the truss) shall provide at least one overhaul socket for connection of flexible cable of portable control device. The length of such cable shall not be less than 3m. The arrangement of overhaul socket shall make the portable control device reach any position of the escalator or moving walk.

5.12.2.5.3 Operating elements of the portable control device shall prevent the accidental action. The operation of the escalator or moving walk shall be carried out continuously by hands.

The switch shall be provided with obvious and legible indication signs for the operation direction. Each portable control device shall be equipped with a stop switch.

For stop switch:

a) Operate manually;

b) Have clear and permanent switch mark of position change;

c) Meet safety switch specified in 5.12.1.2.2;

d) Manually reset.

When the portable control device is plugged into, the stop switch shall disconnect the power supply of the driving host and make the service brake act.

5.12.2.5.4 When the portable control device is used, all the other starting devices shall be out of service and meet the requirements of 5.12.1.2.

All the overhaul sockets shall be set like this: all the portable control device shall be out of service when over one portable control device is connected. The electrical safety devices

7.2 Signs and Alarm Device

7.2.1 Signs, explanation and instruction

7.2.1.1 General provision

All the signs, explanations and instructions shall be made of the durable materials, fixed on the striking positions and written in Chinese (if necessary, use several characters simultaneously) clearly and orderly.

7.2.1.2 Safety signs at the entrance of escalator or moving walk

7.2.1.2.1 The following direction signs and prohibition signs shall be nearby the entrance;

a) "Hold the children" (see Figure G.1);

b) "Embrace the pet" (see Figure G.2);

c) "Hold the handrail" (see Figure G.3);

d) "Pushcart forbidden" (see Figure G.4).

The signs may be added as required, such as "Heavy articles transport forbidden" and

"Barefoot person rejected"

7.2.1.2.2 The emergency stop switch stated in 5.12.2.2.3 shall be red and marked with "stop" on this device or the place next to it.

7.2.1.2.3 During maintenance, repair, inspection or similar works, the proper device shall be fixed at the entrance/exit of escalator or moving walk to stop the unauthorized persons. The device shall:

- - Indicate "No Approach"; or

- - Adopt "No Pass" sign (see GB 5768.2-2009).

7.2.1.3 Operating instructions for hand turning gear

If the hand turning gear is available, the operating instructions shall be attached nearby it and the operation direction of the escalator or moving walk shall be indicated clearly.

7.2.1.4 Instruction for entrance gate of separator room, driving station and reversing station

The fixed and obvious signs shall be on the entrance gate of separator room, driving station and reversing station:

"Key machinery site-Danger; No entry for unauthorized person".

7.2.2 Special indication information of automatic start of escalators and moving walks

For automatic start escalators and moving walks, an apparent signal system shall be set for escalators and moving walks, such as road traffic signal for the purpose of indicating whether escalator or moving walk may be used and its operation direction to the users.

7.3 Inspection and Test

7.3.1 General regulation

The escalators and moving walks shall be inspected before the application for the first time, or after significant reconstruction and normal operation for a while. The inspection and test above shall be carried out by the competent personnel.

7.3.2 Completion inspection, acceptance inspection and test

The completion inspection, acceptance inspection and test shall be carried out on the site where the escalator or moving walk finishes the installation.

For the completion inspection, acceptance inspection and test, the data specified in 6.2 shall be provided. Furthermore, the civil work layout, equipment specification and wiring sketch (current flow diagram and terminal connection diagram with diagram or explanation) shall be provided to check whether the requirements of this standard are met.

The completion inspection cover whether the relevant data to the installed and completed equipment meet the requirements and are in conformity with the requirements related to construction and installation specified in this standard.

Acceptance inspection and test cover:

a) Integral appearance check;

b) Function test;

c) Action validity test of electrical safety devices;

d) Make a brake test for no-load escalator or moving walk to determine whether it meets the specified brake distance (see 5.4.2.1.3.2 and 5.4.2.1.3.4). If necessary, inspect the adjustment of the brake according to the calculated value in 6.2c).

shopping cart or baggage car on escalator or moving walk, see Appendix I) and the necessary safety measures for such purposes;

9) Reasonably foreseeable misuse and prohibition of use;

10) Escalator is recommended not be used as common staircase or emergency exit;

11) The clients are recommended to provide the ceiling plate or enclosure for the open- air escalators and moving walks;

12) Fault diagnosis, repair and restart after stop;

13) For the fault which shall be reset manually, the check and necessary corrective measures shall be carried out before restart and reset;

e) Maintenance information, such as:

1) Must be in conformity with GB/T 18775;

2) Application of personal protection equipment and necessary training;

3) Check item and frequency;

4) Relevant explanation of such maintenance operation as will not be carried out without a certain technical knowledge or special skill, namely the competent persons (such as maintenance personnel and experts);

5) Relevant explanation of maintenance work which is not required special skills and may be carried out by the Owner himself;

6) Relevant drawing and diagram for convenient for the maintenance personnel to complete his mission (especially fault finding);

7) Cleaning explanation;

8) After maintenance of escalator or moving walk, the maintenance personnel puts escalators and moving walks into operation after one complete operation cycle of the stair or pedal is observed;

9) During the maintenance and repair, necessity explanation of application of overhaul control device;

f) Information concerning regular inspection and test in order to determine whether escalator or moving walk operates safely, including:

1) Effective action of electrical safety devices;

2) Brake in conformity with those specified in 7.3.2d);

3) Visible abrasion and cracks of each driven element and tension condition of belt and chain;

4) Breakage of stair, pedal or belt, actual operation and guide conditions;

5) Dimension and tolerance specified in this standard;

6) Condition and adjustment of comb;

7) Interior panel and skirting;

8) Handrail;

9) Electric continuity test between earthing terminal and other spare parts easy to be electrified accidentally at driving station of escalators and moving walks;

g) Emergency condition information, such as:

1) Operating method during accidents or shutdown;

2) Application of hand turning gear (if any) (see 5.4.1.4 and 7.2.1.3);

3) Warning for the possible release or leakage of the hazardous substances and methods to solve their influence as possible;

h) A statement that the sound pressure level measured at the open area 1m from the horizontal direction of driving host surface and 1.6m above the floor plate does not exceed

70dB(A).

7.4.2 Format of instruction

a) Types and dimension of printing shall ensure the legibility. The warning sign and (or) warning should be emphasized by the colour, symbols and (or) enlarged printing;

b) Information for use shall be written in Chinese. In case of multiple languages, each language should be distinguished easily with other languages and the translation and the relevant diagrams should be arranged together;

c) In view of understanding, the diagrams shall be provided for the characters. The

Appendix A (Normative)

Interfaces with Building

A.1 General provisions

The requirements in A.2 and A.3 are very important for the safety of the users and maintenance personnel.

If the manufacturer of the escalator or moving walk fails to meet the requirements (or partial requirements) due to the actual conditions (for example: the escalator or moving walk is not installed by the manufacturer), the instruction shall include the requirements not to be met which shall be as the owner's liability (see 7.4).

A.2 Free space (user)

A.2.1 The vertical clear height of the escalator stair or pedal or belt upside of moving walk shall not be less than 2.30m (see Figure 2 and h4 of Figure A.1).

The vertical clear height shall be extended through to newel ends.

Note: The 2.30m vertical clear height should be suitable for the clear area.

A.2.2 The minimum free space in conformity with Figure A.1 shall be provided around the escalator or moving walk to prevent the impact. The height h12 measured from the stair of escalator or the pedal or belt of moving walk shall not be less than 2.1m. The horizontal distance (see b 10 in Figure A.1) between handrail outer edge and wall or other obstructions shall not be less than 80mm in any case; the vertical distance between handrail lower edge and wall or other obstructions shall not be less than 25mm (see b 12 of Figure 3). If the hazard risk may be reduced by taking proper measures, this space may be reduced properly.

A.2.3 For the parallel or intersected escalator or moving walk, the distance between handrails shall not be less than 160mm (see b 11 of Figure A.1).

A.2.4 If the structure obstructions will cause the personnel injury, the preventive measures shall be taken.

Especially the space between the intersection of the floor slab and each intersected escalator or moving walk, a vertical apron without sharp edge shall be set over the handrail with height not less than 0.3m and shall be extended to 25mm below the bottom edge of the handrail, for example: adopt an imporous set square (see h5 in Figure 2 and Figure 4).

If the distance b 9 between the handrail outer edge and any obstructions is larger than or equal to 400mm, there is no need to comply with this requirement (see Figure A.1).

A.2.5 The entrance/exit of escalators and moving walks shall be provided with sufficient smooth area to contain the personnel. The width of this area shall be at least the distance between handrail outer edge plus 80mm each side and the depth shall be 2.5m at least from the end of the balustrade. If the width of this area is increased to twice or above the distance between the handrail outer edge plus 80mm each side, this depth is allowed to be reduced to

2m.

For the continuously-set escalators and moving walks, the depth of the clear area shall be determined according to specific circumstances, such as the application types (only carrier or person with transport equipment, the number of middle exit, relative direction and theoretical transport capacity).

In the case where the exit of escalator or moving walk may be blocked by the building structure (such as valve and fire door), the handrail height position shall be equipped with additional emergency stop switch (A.2.2 shall be considered) at 2.0m to 3.0m before the stair, pedal or belt reach the intersecting line between comb teeth and step board. The emergency stop switch shall be operated in the passenger stand area of escalator or moving walk.

A.2.6 Multiple continuous escalators or moving walks without middle exit shall be provided with an identical transport capacity (see h) of Table 6).

A.2.7 If the person may touch the outer edge of handrail at the entrance/exit and the hazard may be caused, such as falling from the balustrade, the proper preventive measures shall be taken (see examples in Figure A.2). For example:

- - Set fixed retention device in order to prevent entering into this space;

- - In the hazardous area, the fixed guardrail formed by building structure shall be increased at least 100mm above the handrail and located between 80mm to 120mm at the outer edge of handrail.

A.2.8 At the periphery of escalator or moving walk, especially nearby the comb shall be provided with lighti ng.

Note: The manufacturer and the user shall communicate the relevant information.

A.2.9 The lighting is allowed to be installed at nearby the equipment and (or) on the equipment itself. The illumination at the entrance/exit, including the comb shall be consistent with that required by this area. The illumination measured at the intersecting line between the comb teeth of floor plate plane and the tread shall not be less than 50lx.

A.3 Separation machinery spaces

A.3.1 The escapeway shall be provided to lead to the machinery spaces.

A.3.2 The machinery spaces shall be locked and entered only by the authorized personnel (see 5.3.2.13 of GB/T 18775-2009).

A.3.3 The machinery spaces shall be installed with the electrical lighting fixed permanently in accordance with the following requirements:

a) The illumination on the ground of the working area shall not be less than 200lx;

b) The illumination over the ground leading to the work area shall not be less than 50lx.

A.3.4 The emergency lighting shall be set for the safe evacuation of the personal at any position of the machinery spaces.

Note: The emergency lighting is not used for maintenance or other activities.

A.3.5 The machinery spaces shall be such dimension to ensure the personnel to work in front of the equipment (especially electrical equipment) safely and conveniently.

Especially the clearance height of work area shall not be less than 2m, and:

a) A horizontal clearance area shall be in front of the control panel or the control cabinet and this area shall meet the following requirements:

1) The depth measured from the outer surface of the control panel or control cabinet is not less than 0.7m;

2) The width is 0.5m or the width of control cabinet or control panel, whichever is the larger;

b) A horizontal clearance area of not less than 0.5m×0.6m shall be at the place where the moving part shall be maintained and checked.

A.3.6 The clearance height of activity space shall not be less than 1.8m.

For the passage leading to the work area stated in A.3.5, the width thereof shall not be less than 0.5m. The passage width is allowed to be reduced to 0.4m at the place without the moving parts.

The integrate height of the activity space is measured from the following two points to the bottom surface of the structure top beam:

a) Passage area ground;

b) Work area ground.

A.3.7 The clearance height in the machinery spaces shall not be less than 2m in any case.

A.4 Supply

The Owner and the manufacturer shall reach an agreement in terms of the requirements (such as electric shock, short circuit and overload) of the supply and electric protection which shall meet:

a) GB5226.1;

b) Other relevant national standards.

Appendix D (Normative)

Safety Circuit Test including Electronic Element and (or)

Programmable Electronic System

D.1 General provisions

Because it is impossible for the inspector to inspect on site after assembly, the safety circuit including electronic element shall be subjected to laboratory test.

The following is printed circuit board. If the safety circuit is not assembled in such method, it shall be assumed to be equivalent printed circuit board.

D.2 General requirements

D.2.1 Safety circuit including electronic element

The applicant shall describe the contents below to the laboratory aspect:

a) Category of printed board;

b) Operation condition;

c) Element list;

d) Printed circuit board layout drawing;

e) Mixing circuit layout of safety circuit and printing line marks;

f) Function description;

g) Electrical data including wiring diagram, input and output definitions of printed circuit board shall be covered if any.

D.2.2 Safety circuit based on programmable electronic system

The following data shall be provided besides documents in D.2.1:

a) Document and description related to measures shared by design and implementation methods;

b) General description of used software (such as programme rules, language, compiler and module);

c) Functional description including software structure and hardware or software interface relation;

d) Description of block (physics, reliability and function), module, data, variable and interface;

e) Software list.

D.3 Test sample

It shall be submitted to laboratory;

a) A piece of printed circuit board;

b) A piece of bare board of printed circuit board (excluding components).

D.4 Mechanical test

D.4.1 General regulation

During the test, the test portion (printed circuit board) shall be kept under operating conditions; the safety circuit shall not have unsafe action and state during the whole test and after the test.

D.4.2 Vibration

Transmitting elements of safety circuit shall meet:

a) A.6.1 and Table C.2 (frequency sweep endurance) of GB/T 2423.10-2008: frequency sweep cycle shall be 20 at every axial direction, therein

1) Amplitude is 0.35mm or 5gn; and

2) Frequency range is 10~55Hz;

b) 4.1 and Table 1 (pulse acceleration and duration time) of GB/T 2423.5-1995:

1) Pulse of 294m/s

2 or 30gn peak acceleration;

2) Corresponding pulse duration 11ms: and

3) Corresponding speed variable rate 2.1m/s and wave-shape are half sine.

Note: When the transmitting element is equipped with surge arrester which shall be regarded a part of the transmitting element.

After the test, creepage distance and electric clearance shall not be less than minimum permissible values.

Appendix E (Informative)

Design Manual of Safety Circuit

When such signals are collected from the safety circuit as used for control, remote supervision and alarm, this design manual provides the suggestion to avoid hazardous situation.

The hazardous situation originates in short circuit or partial broken circuit of common wire (earthing wire) in combination with one or more faults leading to possibly the bridging of safety device. The following methods are recommended to be followed:

- - Design printed circuit board and circuit according to distance specified in 3.1 and 3.6 in Table B.1;

- - Arrange common wire of control system of escalators and moving walks behind the electronic component. The broken circuit of common wire will lead to the failure of control (the hazards may be caused by changing the wires within the service life period of escalator or moving walk);

- - All the calculation is in accordance with the most unfavourable condition;

- - For the protection device with external (besides the element) resistor as an input element, this device's internal resistor shall be regarded as unsafe;

- - Element shall be used only in accordance with the given technical conditions;

- - The reverse voltage from electronic components must be considered, in certain cases, isolation circuit may solve the above problems;

- - Design electrical installation in accordance with GB 16895.3;

- - Any design is calculated in accordance with the most unfavourable conditions; if the installation shall be altered or added after installation, the former and new equipment shall be recalculated in accordance with the most unfavourable conditions;

- - Some faults may be removed according to Table B.1;

- - The faults beyond the escalator or moving walk environment may not be considered;

- - If the electric installation is carried out in accordance with GB 16895.3, the disconnection between the main power earth wire of the building and the earthing busbar (rail) of the controller may be removed.

Appendix I (Normative)

Requirements for Escalators and Moving Walks used for Shopping

Cart and Baggage Car

I.1 Escalator

Shopping cart and baggage car shall not be used on the escalator because this will lead to the hazardous situation.

It is generally agreed that the main reasons leading to the hazardous situation above are:

reasonably foreseeable misuse, overload and width limit.

If the shopping cart and (or) baggage car may be used around the escalator, the proper obstructions shall be set to prevent it from entering into the escalator.

Note: If there is transport vehicle (such as shopping cart or baggage car) which may be used on the escalator safely, the escalator manufacturer, transport vehicle manufacturer and the users shall make a risk assessment according to the methods specified in GB/T 20900 to determine the corresponding measures.

The outline guideline is as follows:

Shopping cart or baggage car manufacturer and escalator manufacturer shall specify the technical specification of shopping cart or baggage car used on the escalator. The application of shopping cart or baggage car inconformity to the requirements in the escalator area will lead to serious risk, therefore, it is necessary to prevent it entering into the escalator.

The width of the shopping cart or baggage car and articles on the cart (car) should be

400mm smaller than the nominal width of the stair. Even though the shopping cart or baggage car is on the escalator, the passenger may also leave the escalator.

The operating distance of horizontal stair of escalator should be 1.6m at the entrance/exit of both ends; the transition curvature radius upside is 2.6m at minimum and lower part is 2.0m at minimum; the rated speed is within 0.5m/s and the angle of inclination is within 30°.

The comb should be designed to such an angle of inclination beta as not exceed 19° at maximum; the roller diameter of corresponding shopping cart or baggage car shall not be less than 120mm.

The handrail height position shall be equipped with additional emergency stop switch (A.2.2 shall be considered) at 2.0m to 3.0m before the stair reaches the intersecting line between comb teeth and step board. The emergency stop switch nearby transition curve area should be operated in the passenger stand area of escalator; the emergency stop switch at the exit should be operated from the outside of the escalator.

Shopping cart or baggage car should be in accordance with design of escalator at the following aspects:

- - Design of shopping cart or baggage car should ensure safe and correct loading;

- - Maximum weight of loaded shopping cart or baggage car should not be larger than

160kg;

- - The shopping cart or baggage car should be locked automatically at the inclined part of the escalator;

- - The shopping cart or baggage car should be set with brake or retention devices;

- - The shopping cart or baggage car should have the devices to resistant to clamping (the buffer device) to reduce the clamping risk;

- - In order to leave escalator safely, the rear wheel of the shopping cart or baggage car shall push the front wheel over the comb. The front wheel and (or) retention device should be separated easily from the stair;

- - Set the guiding device at the surrounding zones to ensure the shopping cart or baggage car to enter into the escalator correctly;

- - Such signs shall be set as the safety signs and indicating signs for correct use of shopping cart or baggage car.

I.2 Moving walk

Appropriate shopping cart (in accordance with EN 1929-2 and EN 1929-4) and baggage car are allowed to be used on the moving walk.

Shopping cart or baggage car manufacturer and moving walk manufacturer shall specify the technical specification of shopping cart or baggage car used on the moving walk. The application of shopping cart or baggage car inconformity to the requirements in the moving walk area will lead to serious risks, therefore, it is necessary to prevent it entering into the moving walk.

The width of the shopping cart or baggage car and articles on the cart (car) should be

400mm smaller than the nominal width of the pedal or belt. Even though the shopping cart or baggage car is on the moving walk, the passenger may also leave the moving walk.

For the moving walk of angle of inclination larger than 6°, the rated speed shall be confined in 0.5m/s.

The comb should be designed to such an angle of inclination beta not exceed 19° at maximum;

the roller diameter of corresponding shopping cart or baggage car shall not be less than 120mm.

The handrail height position shall be equipped with additional emergency stop switch (A.2.2 shall be considered) at 2.0m to 3.0m before the pedal reaches the intersecting line between comb teeth and step board. The emergency stop switch nearby transition curve area should be operated in the passenger stand area of moving walk; the emergency stop switch at the exit should be operated from the outside of the moving walk.

Shopping cart or baggage car should be in accordance with design of moving walk at the following aspects:

- - Design of shopping cart or baggage car shall ensure safe and correct load;

- - Maximum weight of loaded shopping cart or baggage car should not be larger than

160kg;

- - The shopping cart or baggage car should be locked automatically at the inclined part of the moving walk;

- - The shopping cart or baggage car should be set with brake or retention devices;

- - The shopping cart or baggage car should have the devices to resistant to clamping (the buffer device) to reduce the clamping risk;

- - In order to leave moving walk safely, the rear wheel of the shopping cart or baggage car shall push the front wheel over the comb. The front wheel and (or) retention device should be separated easily from the pedal;

- - Set the guiding device at the surrounding zones to ensure the shopping cart or baggage car to enter into the moving walk correctly;

- - Such signs shall be set as the safety signs and indicating signs for correct use of shopping cart or baggage car.

Chinese Standards

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Translated by: Field Test Asia Pte. Ltd. (Incorporated & taxed in Singapore. Tax ID: 201302277C)

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