Fire prevention code for light steel villas

 Fire prevention code for light steel villas

1 Fire

In addition to the provisions of this code, the fire protection design of low-rise cold-formed steel housing buildings (light-steel villas) should also comply with the relevant provisions of the current national standard "Fire Prevention Code for Building Design" GB50016.

2 The following parts in the light steel villa construction shall be separated from other parts by non-burning body wall and floor wrench with fire resistance limit of not less than 1.00h (mandatory requirements) :
Power distribution room, boiler room, motor garage.
Database (room), archives (room), storage room.

3. Communal kitchen.
3.1 For motor-operated garages attached to cold-formed steel houses (light-steel villas) and for use only by the houses, the doors connected to the living parts shall be fire doors of Grade B, and no openings shall be opened within 100mm of the garage partition wall from the ground.
3.2 Door and window openings on both sides of the walls between the residential units shall be spaced not less than 1.0m horizontally between their nearest edges.
3.3 For a cold-formed thin-walled steel building (light-steel villa) composed of different heights, the minimum distance between the skylight on the lower part of the roof and the door and window openings on the outer wall of the higher part should not be less than 4.0m. The distance is not restricted when one of the following conditions is met:
The lower part is equipped with an automatic sprinkler system or a fixed Class B fire window with a skylight.
3.4 The door on the outer wall of the higher part is a Class B fire door that can be closed automatically in case of fire. Fixed Class B fire Windows are arranged in the Windows and openings.
3.5 The vertical exhaust pipes in bathrooms, bathrooms and kitchens shall be backflow protected or fireproof valves shall be installed on the branch pipes. A fire valve with an operating temperature of 150 ° C should be set at the branch connecting the kitchen exhaust pipe and vertical exhaust pipe.
3.6 When pipelines in a building pass through the walls between floor slabs and residential building units and household walls, fire blocking materials shall be used to fill the gaps tightly; When the crown passage is difficult to burn or combustible plate, fire resistance measures should be taken on both sides of the perforating part.
3.7 Fire alarm device can be installed in low-rise cold-formed thin-walled steel dwelling houses (light-steel villas).

The following are the instructions in this chapter:

1 This article stipulates the applicable scope of fire prevention design of this code, and clarifies the relationship between it and the current national standard "Code for Fire Prevention of Building Design" GB50016. Cold-formed thin-walled steel buildings (light steel villas) have their own structural characteristics, so the provisions of this chapter should be implemented in the fire prevention design of buildings. For those not specified in this chapter, such as fire-resistant grade, fire spacing, safe evacuation, fire control facilities, etc., the design shall be in accordance with the relevant provisions of the current national standard "Code for Fire Prevention in Building Design" GB50016.

2, 3 This article provides for the requirement of fire separation between hazardous sites attached to cold-formed steel residential buildings (light steel villas) and other parts of the building. For the use of the need to open doors and Windows openings, should consider taking appropriate fire protection measures. In order to prevent the leakage of fuel vapor from the motor garage into the residential part, it is required that no openings should be opened on the partition wall within 100mm from the garage floor. In the case of more vehicles, or not only for the use of the residence garage fire design should be in accordance with the "garage, repair garage, parking lot design fire code" GB50067 provisions.

4 In order to prevent the adjacent units from being affected by fire smoke when a fire occurs in a light steel villa, the horizontal distance between the closest edges of Windows on both sides of the wall between units is stipulated in this article. In addition, the walls between the units should be built to the bottom of the roof panels, so that the partition can really play the role of fire partition, so as to limit the fire in a unit, prevent spread, reduce losses.In unit type residence, the wall between the unit should do not have door and window hole, in order to achieve the goal of fireproof division. If the fire resistance limit of the roof slab cannot meet the corresponding requirements, measures such as taking partitions out of the roof should be considered to prevent the spread of fire between units.

5 The purpose of this article is mainly to prevent the flames from rapidly burning through the skylight and spreading to the wall of the higher part of the building in case of fire. Setting up automatic sprinkler system or fixed fire window can effectively prevent the spread of fire.

6 In order to prevent the fire from spreading through the vertical exhaust pipe (natural or mechanical) in the bathroom, toilet and kitchen of the light Steel villa, it is required that the vertical exhaust pipe in these parts take backflow prevention measures or set fire valves on its branches. Because the kitchen exhaust gases from the normal operating temperature is higher, if set 70 degrees Celsius on vertical exhaust duct movement of the fire valve will influence the normal operation of the kitchen exhaust "according to the operation needs and kitchen common temperature when the fire broke out, the provisions of this light steel residential platoon lampblack of the kitchen pipe manifold and vertical exhaust duct joint action of the fire valve should be set 150 degrees Celsius,

7 In the light steel villa residential building, when pipelines, such as water pipes, must pass through the walls between units and household walls due to constraints, non-combustible materials such as cement mortar or fireproof materials shall be applied to fill the cracks around the pipelines. For pipes made of plastics and other materials that are liable to shrink, deform or ablative when exposed to high temperature or flame, measures should be taken to seal such pipes after fire, such as setting heat expansion fire resistance ring, in order to reduce fire and smoke passing through the fireproof burp body.

8 Considering that the occupant in the residence is likely to be asleep, the fire alarm device is set, which can give a timely alarm in case of fire and provide favorable conditions for the safety escape of the occupant.

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