GB 12955-2024Fire-resistant doorsets (English PDF)

4.1 Classification and code

4.1.1 Classification and code by application sites are shown in Table 1.

4.1.2 Classification and code by the number of door leaves are shown in Table 2.

4.1.3 Classification and codes by fire resistance are shown in Table 3.

4.2 Specifications The specifications of fire-resistant doorsets are expressed in the thousands and hundreds digits (the tens digit is rounded off) of the opening size mark width and mark height (in millimeters), arranged in sequence as four digits. If the size is less than 1 000 mm, add 0 in front. The basic specifications of the opening size shall comply with the relevant provisions of GB/T 5824. The relationship between the width and height dimensions of the opening marked on the specifications of fire-resistant doorsets and the width and height dimensions of the fire-resistant doorsets' exterior structure shall be as per the relevant provisions of GB/T 5824. Example

1.The marking width of the fire-resistant doorsets' opening is 900 mm and the marking height is 2 100 mm, and its specification is expressed as 0921. Example

2.The marking width of the fire-resistant doorsets' opening is 2 110 mm and the marking height is 2 370 mm, and its specification is expressed as 2124.

4.3 Model The method for compiling fire-resistant doorsets' models is shown in Figure 1.

6.1 Appearance

6.1.1 The surface of fire-resistant doorsets and their accessories shall be smooth and flat, without cracks, gouging marks, burrs or welding slag; the decorative surfaces of fire-resistant doorsets such as paint (spraying), film, and veneer shall be firm and without obvious bubbling, cracks or wrinkles.

6.1.2 Fire-resistant doorsets shall have a permanent product marking plate fixed in a prominent position on the door frame or door leaf, which shall not be pasted. Normally closed fire-resistant doorsets in evacuation passages and small door leaves installed on the door leaf of fire-resistant doorsets for temporary passage of personnel shall have a permanent warning sign with the words "Keep the fire-resistant doorset closed" fixed in a prominent position in the middle of the door leave surface. Product marking plates and warning signs shall comply with the requirements of 9.1.

6.2.1 Material thickness dimensional deviation

6.2.1.1 The deviation between the actual thickness of the steel plates used for fire- resistant doorsets' door panels and door frames and the nominal thickness indicated in the technical documents shall comply with the requirements of GB/T 708 and GB/T 709.

6.2.1.2 The deviation between the actual thickness of the glass used in fire-resistant doorsets and the nominal thickness indicated in the technical documents shall comply with the provisions of GB 15763.1.

6.2.1.3 The deviation between the actual thickness of the non-combustible inorganic compound board used in fire-resistant doorsets and the nominal thickness indicated in the technical documents shall comply with the provisions of GB/T 25970.

6.2.2 Dimensional deviation The deviation between the actual dimensions of the fire-resistant doorset and the dimensions indicated in the technical documents shall comply with the provisions of Table 5.

6.3 Key material properties

6.3.1 Main materials of door frame The combustion performance of the wood material or the material formed by combining wood material and non-combustible inorganic compound board as the main body of the fire-resistant doorsets' frame shall not be lower than Class B specified in Table 2 of GB 8624-2012.

6.3.2 Filling material for door leaf The performance of the filling material for door leaf shall comply with the provisions of Appendix A.

6.4.1 Seals

6.4.1.1 The seals shall be embedded in the groove smoothly and continuously or pasted in the designated position according to the design requirements. The embedding or pasting shall be tight and firm, without loose protrusions, and there shall be no shrinkage gaps at the joints.

6.4.1.2 The performance of fire intumescent seals shall comply with the requirements of GB 16807.

6.4.2 Glass

6.4.2.1 Glass shall be fire-resistant glass, and its performance shall comply with the requirements of GB 15763.1.

6.4.2.2 The fire resistance performance of the insulated fire-resistant glass used in the installation of insulated fire-resistant doorsets, partially insulated fire-resistant doorsets and non-insulated fire-resistant doorsets shall not be lower than that of the corresponding fire-resistant doorsets.

6.4.2.3 The fire resistance integrity of non-insulated fire-resistant glass used in the installation of insulated fire-resistant doorsets and partially insulated fire-resistant doorsets shall not be lower than that of the fire-resistant doorsets, and the total light transmission area shall not be greater than

0.1 m2.

6.4.2.4 The fire resistance of non-insulated fire-resistant glass used in the installation of non-insulated fire-resistant doorsets shall not be lower than that of fire-resistant doorsets.

6.4.3 Locks

6.4.3.1 Locks shall have a handle or a push-bar. Round or spherical knob shall not be used to replace the handle (except for fire-resistant doorsets for pipe shaft inspection).

6.4.3.2 The fire resistance performance of locks shall not be lower than the fire resistance integrity requirements of fire-resistant doorsets; the performance of push-bar emergency exit locks installed on fire-resistant doorsets shall comply with the provisions of GB 30051, and the fire resistance performance of other locks shall comply with the provisions of Appendix B.

6.4.4 Hinges The quantity, specifications, strength, etc. of hinges shall be compatible with the model specifications and door leaf quality of the relevant fire-resistant doorset, and the resistance to repeat opening and closing shall not be lower than that specified in 6.5.1; the fire resistance performance shall comply with the requirements of Appendix B and shall not be lower than the fire resistance integrity requirements for fire-resistant doorsets.

6.4.5 Door closing device

6.4.5.1 Where the door closing device is a fire-resistant doorset closer, it shall comply with the provisions of XF

93.Where the door closing device is of other types, its quantity, specifications and strength shall be compatible with the model specifications and door leaf quality of the relevant fire-resistant doorset, and its resistance to repeat opening and closing shall not be lower than that specified in 6.5.1.

6.4.5.2 The performance of the door closing device installed on the normally open fire- resistant doorsets for evacuation passage shall also meet the following requirements.

a) The fire-resistant doorset can be stopped at the specified position or area;

b) After the door leaf is opened 90° ± 5° and maintained for 2 400 hours, it can be released from the stopped state and completely closed within (3~20) seconds.

6.4.6 Sequencer The material of the sequencer shall be steel (except for the part in direct contact with the door leaf). Its specifications and strength shall be compatible with the model specifications and door leaf quality of the relevant fire-resistant doorset. The resistance to repeat opening and closing shall not be lower than the requirements of 6.5.1.

6.4.7 Latch

6.4.7.1 The main load-bearing parts of the latch shall be made of steel.

6.4.7.2 The latch installed on the fire-resistant doorsets for evacuation passage shall be able to open automatically when the door leaf is opened.

6.5 Mechanical properties

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