LY/T 3142-2019Technical standard for log house (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

Please note that some elements of this document may involve patents. The issuer of this document is not responsible for identifying these patents.

This standard was proposed and managed by the National Timber Standardization Technical Committee Structural Timber Subcommittee (SAC/TC41/SC4).

This standard was drafted. Institute of Wood Industry, Chinese Academy of Forestry, Dalian Fangyuan Wooden Villa Manufacturing Co., Ltd., Beijing Jiaotong University, National Center for Quality Supervision and Inspection of Wood-based Panels and Wood and Bamboo Products, National Engineering Research Center of Wood Industry, Beijing Forestry University, Torch High-tech Industrial Development Center of the Ministry of Science and Technology, Guangdong Runcheng Chuangzhan Wood Industry Co., Ltd., Manzhouli Kairun Wood Industry Co., Ltd., Dongguan Fu Lin Energy-saving Housing Technology Co., Ltd., Manzhouli Lvyuan Wooden Products Development Co., Ltd., Beijing Hyde Wooden House Co., Ltd.

1 Scope

This standard specifies the basic rules, materials, components, protection, thermal insulation, sound insulation, construction and engineering acceptance of well-dried wood structures.

And other requirements.

This standard applies to the second floor or less (excluding the attic part), the building area does not exceed 500 m2, and the building height is less than 10 m Well dry wood construction. For well-dried timber structure buildings exceeding the number of floors, area or building height, the structural calculation should be carried out separately.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this document.

For undated references, the latest version (including all amendments) applies to this document.

GB/T 144 Log Inspection GB/T 153 Coniferous sawn timber GB/T 700 carbon structural steel GB/T 4817 Hardwood sawnwood GB/T 5780 Hex head bolt C GB/T 5782 hexagon head bolt GB/T 6491 Drying quality of sawn timber GB/T 8484 Thermal insulation performance classification and detection methods for doors and windows of buildings GB/T 26899 Structural Laminate GB/T 27651 Classification and requirements for use of antiseptic wood GB/T 33041 Classification of terrestrial wood decay and termite hazards in China GB 50005 wood structure design standard GB/T 50083 Basic Terminology Standard for Engineering Structure Design GB 50206 Code for Construction Quality Acceptance of Timber Structure Engineering GB 50222 Code for fire protection design of building interior decoration GB/T 50353 Code for calculation of construction area LY/T 2059 Steel nails for wood structures LY/T 2383 Structural timber strength grade JGJ/T 245 Technical term for house termite prevention

3 Terms and definitions

GB/T 50083, GB/T 50353 and the following terms and definitions apply to this document.

Horizontal member horizontal member in well dry structure applications, horizontally placed wooden members are called crossbars.

Log structure

The cross-sections of circular, rectangular and other cross-sections are stacked in parallel to the upper layer.

The structure is constructed by standing pillars on the wall.

Attic

Located at the uppermost part of the building, the clearance between the sloped roof and the lower horizontal floor should be less than 2.1m. Not counting buildings here Number of layers.

Building area

Floor area of a building (including walls).

[GB/T 50353, term 2.0.1] 3.4 Building height the flat roof is calculated from the height of the building's outdoor ground to its roofing surface, and the sloped roof should be based on the flatness of the building's outdoor ground to the eaves and ridge.

Average height calculation.

Structural wall

Load-bearing walls that are mainly subjected to lateral forces or earthquakes and maintain the overall stability of the structure, also known as shear walls, seismic walls, etc.

[GB/T 50083, structural term 3.2.24] 3.6 Through bolt A metal connecting piece that runs from the foundation to the top of the wall and connects the crossbars in series.

Anchor bolt

A kind of embedded in the foundation and connecting and fixing the foundation with the first wooden beam of the foundation or the first layer of horizontal wells of the well-dry wall Metal connection.

4 Materials

5 Yokogi

6 Basics

6.1 The lower part of a load-bearing wall shall be constructed with a foundation that can safely transmit the upper load to the ground. Independent foundations, strip foundations or rafts may be used.

basis. When an independent foundation or a strip foundation is used, the overhead layer below the ground should not be less than 450mm.

6.2 Anchor bolts should be embedded in the corners of the foundation wall, within 30 cm of the connection between the foundation beams or crossbars, and the spacing on the foundation wall should not be larger 2m.

6.3 The diameter of the anchor bolts embedded in the foundation shall not be less than 12mm. Earthquake fortification intensity of 8 degrees and above or basic wind pressure of 0.55kN/m2 and in the above areas, the anchor diameter should not be less than 20mm.

6.4 The length of the anchor bolts embedded in the foundation shall be more than 25 times the bolt diameter. If there is a layer of foundation beam under the cross beam and through bolts it is not designed to be connected to the foundation beam, and the length of the foundation anchor bolt above the foundation can connect the foundation beam with the upper layer of horizontal logs. Seismic fortification intensity 8 in areas with an air pressure of 0.55kN/m2 and above, the length of the foundation anchors above the foundation should be sufficient to connect the upper three layers of crossbars.

7 Wall

9 Roof

9.1 Each purlin in the roof shall be connected with the slidable metal connecting piece at the upper end of the wall. In order to improve the wind resistance, the wall the upper 4 or more crossbars are pulled up and down and connected to the roof, as shown in Figure 15.

Figure 15 Connection method of roof and wall

9.2 For roof trusses, the four structural forms in Table 5 can be selected. For the case where the roof truss needs to resist strong horizontal shear force, the d form should be selected, and Fasten the walls together with pins.

Table 5 Structural form of roof truss

abcd

10 Antisepsis requirements and measures

10.1 The upper horizontal beams and wooden pins that have been in a humid environment for a long time should be effectively treated.

For new sections produced during construction, equivalent preservatives should be applied. China's terrestrial wood decay and termite hazard classifications are divided according to GB/T 33041 it is stipulated that the anticorrosive grade is in accordance with GB/T 27651.

Table 6 Anti-corrosion requirements for cross beams

Hazard of wood decay on outdoor ground, etc.

Class area

Anticorrosive grade

As shown in Figure 16, when the position 300 mm above the horizontal when it is 1000mm, the wooden member within the base level and 300mm above;

When the position 300 mm above the foundation level is less than 1000 mm from the foundation, Wooden members within 1000mm above the foundation in contact with the ground, blocks or concrete D1 C3.1 C4.1 D2 C3.2 C4.2 D3 C3.2 C4.2

Table 7 Termite anti-term requirements

Wood Termite Hazard Level Area Insect level as shown in Figure 16, when the position above the ground level is 300 mm above the ground, when it is 1000mm, the wooden member within the base level and 300mm above;

When the position 300 mm above the base level is less than 1000 mm from the ground, Wooden members within 1000mm above the ground in contact with the ground, blocks or concrete T1 C3.1 C4.1 T2 C3.2 C4.2 T3 C3.2 C4.2

Figure 16 Anticorrosive treatment

10.2 For areas where termites are severely damaged, the soil around the foundation should be treated with termite prevention.

10.3 The foundation beam platform or the first layer of crossbars above the foundation shall not directly contact the concrete foundation, and shall be separated by waterproof coils or rubber pads.

10.4 Metal connectors shall be anti-corrosive treated with anti-rust paint, hot plating or electroplating.

10.5 The roof should be sloped, and the eaves should protrude more than 60cm from the wall, as shown in Figure 16. Projections on exterior walls, such as windowsills, balconies Wait for flooding.

11 Fire retardant requirements and measures

11.1 If the combustion performance of the wall is required to be a non-combustible body, fire-resistant gypsum board shall be installed or cross-bars treated with flame retardant shall be used. If fire gypsum board is laid, the horizontal logs in the wall can be treated without flame retardant, as shown in Figure 17. The fire resistance limit of the wall should be at least 1 layer on both sides of the wall.

12mm and above fire-resistant gypsum board. Plasterboard laying walls should adopt special connections to avoid vertical deformation differences between wood and plasterboard.

11.2 Beams and load-bearing columns in well dry buildings may not be flame-retardant treated, but shall meet the fire resistance limit required by the design.

11.3 The inside of the building (house) cover shall be provided with horizontal fire separation, and fire connection shall be provided at the connection with the corner of the wall.

11.4 When wires and cables pass through walls and buildings (houses), metal sleeves should be worn, and fire-blocking materials should be used to seal their gaps.

Management.

Figure 17 Typical fire protection structure of wall

12 Thermal insulation requirements and measures

12.1 In severe cold and cold areas, the ground floor shall be treated with heat insulation, and the thickness of the heat insulation material shall be determined in accordance with the actual requirements.

12.2 The thermal insulation of the external wall can adopt three methods of solid wall, external thermal insulation and internal thermal insulation, as shown in Figure 18. Wall with insulation the material and thickness should be determined according to the target energy saving requirements.

a. solid external wall b. external thermal insulation external wall c. internal thermal insulation external wall

Figure 18 Wall insulation structure

12.3 The gaps between windows and walls shall be filled and sealed with flexible thermal insulation materials, and lateral and vertical cover seams shall be nailed externally, as shown in Figure 19.

Show. Well dry-type wooden structure buildings shall use external windows with high thermal resistance, and the heat transfer coefficient shall reach level 5 and above specified in GB/T 8484.

Figure 19 Wall and window structure

12.4 The gaps between the outer door and the wall shall be filled and sealed with polyurethane foam material, and the heat transfer coefficient shall be in the 5th grade specified in GB/T 8484 and the above.

12.5 The roof shall be heat-insulated. Refer to Figure 20 for the structure. For flat roofs, thermal insulation should be placed between the joists of the roof Floor. If there is no direct contact between the top of the external wall and the roof slab, a sealing plate should be installed on the outside or the top of the external wall, and the heat insulation layer should be laid to the external wall.

Close the sealing plate above the uppermost horizontal beam. For sloping roofs, if a suspended ceiling is not used because of the increase in the upper space of the room, the thermal insulation layer should be it is placed between the joists of the roof and laid on the top wall of the outer wall to seal the baffle. For example, the Leave the ventilation channel, and the upper part of the heat insulation layer should be close to it to lay a waterproof and breathable membrane.

Figure 20 Roof insulation measures

13 Sound insulation requirements and measures

13.1 In the same building, where there is a requirement for sound insulation between rooms or floors, the wall and floor structure shall be designed for sound insulation.

13.2 Floor Sound Insulation Materials can be added to the joist floor space, as shown in Figure 14. The type and thickness of sound insulation materials shall be based on design documents.

In order...