The cotton warehouse belongs to category C.

According to the Code for Fire Protection Design of Buildings (GB 500 16-2006), Class C warehouses refer to warehouses with fire protection grade C, which can store incombustible products (liquids and combustible solids with flash point greater than or equal to 60℃), and ordinary warehouses are all of Class C fire protection grade. So, what are the consumption design requirements for Class C warehouses? Let's get to know each other.

I. Fire resistance rating of Class C warehouse

According to Code for Fire Protection Design of Buildings (GB 500 16-2006), the fire resistance rating of workshops and warehouses can be divided into Grade I, Grade II, Grade III and Grade IV. Unless otherwise specified in this specification, the combustion performance and fire resistance limit of corresponding building components shall not be lower than the provisions in Table 3.2. 1.

3.2.7 The fire resistance rating of multi-storey Class C warehouse shall not be lower than Grade II. The fire resistance rating of single-layer C warehouses and multi-layer C warehouses for storing combustible solids shall not be lower than Grade III.

3.2.9 The fire resistance limit of Class C warehouse firewall shall not be less than 4.00 hours.

3.2. 10 The fire resistance limit of the columns of a single-storey factory building (warehouse) with first-class and second-class fire resistance shall not be lower than 2.50h and 2.00h respectively.

3.2. 1 1 The fire resistance limit of the roof load-bearing members of single-storey and multi-storey factories (warehouses) fully protected by automatic sprinkler system should not be lower than1.00h. ..

3.2. 12 Except for Class A and Class B warehouses and high-rise warehouses, the fire resistance limit of non-load-bearing external walls of Class I and Class II fire-resistant buildings should not be less than 0.25h when non-combustible walls are used, and should not be less than 0.50h when non-combustible walls are used.

3.2. 13 When the room partition wall in the secondary fire-resistant factory building (warehouse) is adopted, its fire resistance limit should be increased by 0.25h h..

3.2. 14 The fire resistance limit of prestressed reinforced concrete floors of multi-storey factories and warehouses with fire resistance grade II shall not be less than 0.75h.

3.2. 15 The fire resistance limits of the roof panels of the first and second fire-resistant workshops (warehouses) shall not be lower than 1.50h and 1.00h respectively.

3.2. 16 incombustible materials shall be used for the roof panels of primary and secondary fire-resistant workshops (warehouses). The waterproof layer of the roof should be made of incombustible and flame retardant materials. When combustible waterproof materials are used and laid on combustible, flame-retardant and heat-insulating materials, the waterproof materials or combustible, flame-retardant and heat-insulating materials should use incombustible materials as protective layers.

3.2. 17 when it is really necessary to use metal sandwich panels for building non-load-bearing external walls, room partitions and roof panels, the core materials shall be non-combustible materials, and the fire resistance limit shall comply with the relevant provisions of this specification.

3.2. 18 Unless otherwise specified in this specification, the fire resistance rating of a factory building (warehouse) with wooden columns as load-bearing and walls made of incombustible materials can be determined according to Grade 4.

3.2. 19 Fire prevention measures should be taken for the exposed parts of precast reinforced concrete members, and the fire resistance of the joints should not be lower than that of the corresponding members.

Second, the number of floors, area and layout of the warehouse

3.3.2 Unless otherwise specified in this specification, the number of storeys and the area of the warehouse shall comply with the provisions in Table 3.3.2.

Note: 1. Fireproof partitions must be separated in the warehouse, and the firewall between the fire partitions of Class A and Class B warehouses shall not open doors, windows and holes; The maximum allowable building area of underground or semi-underground warehouses (including underground or semi-basement) shall not be larger than the above-ground warehouses of corresponding categories.

2. The barreled oil warehouse in the oil storage area shall comply with the current national standard "Code for Design of Oil Depots" GB 50074.

3. The maximum allowable building area of each fire compartment of the coal homogenization warehouse with first-class and second-class fire resistance should not be greater than 12000m2.

4. For independently built nitric acid warehouses, calcium carbide warehouses, polyethylene and other polymer products warehouses, urea warehouses, coal blending warehouses, and independent finished product warehouses in paper mills, when the fire resistance rating of buildings is not lower than Grade II, the maximum allowable building area of each warehouse and the maximum allowable building area of each fire zone can be increased by 1.0 times as specified in this table.

5. The maximum allowable construction area of the first-class and second-class fireproof grain warehouses should not be greater than 12000m2, and the maximum allowable construction area of each fireproof partition should not be greater than 3000m2；; The maximum allowable building area of the grain warehouse with three-level fire resistance should not be greater than 3000m2, and the maximum allowable building area of each fire zone should not be greater than 1000m2.

6. The maximum allowable building area of a single-layer cotton warehouse with a first-class and second-class fire resistance rating and an area not exceeding 2000m2 should not exceed 2000m2.

7. The maximum allowable floor area and the maximum allowable building area of the first-class and second-class fire-resistant cold storage should comply with the current national standard "Code for Design of Cold Storage" GB 50072.

8. "-"means not allowed.

3.3.3 When an automatic fire extinguishing system is installed in the warehouse, the maximum allowable floor area of each warehouse and the maximum allowable building area of each fire partition can be increased by 1.0 times according to the provisions of Article 3.3.2 of this specification, except for the fire partition of the cold storage.

3.3.6 When an intermediate warehouse is set up in the factory building, the following provisions shall be met: Class A, B and C intermediate warehouses shall be separated from other parts by firewalls and incombustible floors with fire resistance not less than 1.50h; The fire resistance grade and area of the warehouse shall comply with the provisions of Articles 3.3.2 and 3.3.3 of this specification.

3.3.9 It is forbidden to set up staff dormitory in the warehouse.

Office, lounge, etc. It is strictly prohibited to set it in Class A and Class B warehouses and should not be adjacent to each other.

When setting up offices and lounges in Class C and D warehouses, fireproof partition walls with fire resistance limit of not less than 2.50h and floors of 1.00h should be used to separate them from other parts, and independent exits should be set up. When the partition wall needs to be opened with interconnected doors, Class B fire doors should be adopted.

3.3. The fire protection design of10 logistics building shall meet the following requirements:

1. When the building function is mainly sorting and processing, it shall be determined according to the relevant provisions of this specification, and the storage part shall be determined according to the intermediate warehouse;

2. When the main function of a building is warehousing or it is difficult to distinguish the main functions of the building, it shall be determined according to the provisions of this specification on warehousing. However, when the work area such as sorting is completely separated from the storage area by a firewall, the fire protection requirements of the work area and the storage area can be determined according to the provisions of this specification on factories and warehouses respectively. Among them, when the work area such as sorting is completely separated from the storage area by a firewall and the following conditions are met, the maximum allowable building area of the fire partition of the storage area and the maximum allowable building area of some buildings in the storage area can be increased by 3.0 times according to the provisions in Table 3.3.2 of this specification (excluding the note), except for the automatic control of Class C overhead warehouse:

(1) Store Class C articles except flammable liquids, cotton, hemp, silk, wool, other textiles, foamed plastics, etc., and the fire resistance rating of the building shall not be lower than Grade I;

(2) Store D and E articles, and the fire resistance rating of the building shall not be lower than Grade II;

(3) All buildings are equipped with automatic water fire extinguishing system and automatic fire alarm system.

3.3. 1 1 Class A and B factories (warehouses) should not be equipped with railway lines.

The roofs of Class C, D and E workshops (warehouses) that need to enter steam locomotives and diesel locomotives should adopt incombustible materials or take other fire prevention measures.

Third, the warehouse fire spacing

3.5.2 Unless otherwise specified in this specification, the fire prevention spacing between warehouses of Class B, C, D and E and between warehouses and civil buildings shall not be less than that specified in Table 3.5.2.

Note: 1. When the adjacent external walls of two warehouses are all firewalls, the fire separation distance can be appropriately reduced, but for Class C warehouses, it should not be less than 6m. When the external walls on the adjacent higher side of two warehouses are firewalls, or the external walls on either side of two adjacent buildings with the same first-class and second-class fire resistance ratings are firewalls, and the fire resistance limit of the roof is not less than 1.00h, and the total construction area is not greater than the maximum allowable construction area of a warehouse specified in Article 3.3.2 of this specification, the fire prevention spacing is not limited.

3. Except for Item 6 of Class B, the fire prevention distance between Class B warehouse and civil buildings should not be less than 25m, and the fire prevention distance between Class B warehouse and railway (40m outside the factory and 30m inside the factory) and roads (20m outside the factory and 5m inside the factory) should not be less than 25m.

Fourth, explosion-proof warehouse

3.6.3 Pressure relief facilities shall adopt light roof panels, light walls, doors and windows which are easy to release pressure, and safety glass and other materials which will not produce sharp fragments during explosion.

Pressure relief facilities should be set away from crowded places and main traffic roads, and should be close to the parts with explosion danger.

As pressure relief facilities, the mass of light roof panels and walls should not be greater than 60kg/m2.

Pressure relief facilities on the roof should take measures to prevent ice and snow accumulation.

3.6. 12 Class C liquid warehouse should have facilities to prevent liquid from scattering. Measures should be taken to prevent articles that will burn and explode when wet from soaking in the warehouse.

3.6. 14 warehouse or warehouse with explosion danger shall adopt explosion-proof measures and pressure relief facilities according to the provisions of this section.

Verb (abbreviation of verb) Safe evacuation of warehouse

3.8. 1 The safe exits of the warehouse shall be distributed. The horizontal distance between the nearest edges of two adjacent exits on each floor in each fire zone or a fire zone should not be less than 5m.

3.8.2 There should be no less than two safety exits for each warehouse. When the warehouse area is not more than 300m2, 1 safety exits can be set. There should be no less than two exits to evacuation walkways, stairs or outdoors in each fire compartment in the warehouse. When the building area of the fire zone is not more than 100m2, 1 exit can be set. Doors leading to evacuation walkways or stairs shall be Class B fire doors.

3.8.3 Underground or semi-underground warehouses (including underground or semi-basement) shall have at least two safety exits; When the building area is not more than 100m2, 1 exit can be set.

For underground or semi-underground warehouses (including underground or semi-basement), when there are multiple fire zones arranged adjacent to each other and separated by firewalls, each fire zone can use Class A fire doors leading to the adjacent fire zones on the firewall as the second safety exits, but each fire zone must have at least 1 safety exits leading to the outside.

3.8.4 The safe evacuation design of cold storage, grain silos and vaults shall conform to current national standards, such as GB 50072 for Cold Storage Design and GB 50322 for Grain Steel Silos Design.

3.8.5 When the superstructure area of the grain silo is less than 1000m2 and the number of workers is less than 2, 1 exit can be set.

3.8.6 The outdoor metal ladders of warehouses and silos that meet the requirements of Article 6.4.5 of this specification can be used as evacuation stairs, but the fire resistance of the outdoor stair platform of silos should not be less than 0.25h h. ..

3.8.7 The evacuation stairs of high-rise warehouse should adopt closed stairwells.

3.8.8 Except for multi-storey E-type warehouses with first-class and second-class fire resistance, the lifting facilities for vertically transporting articles in other warehouses should be set outside the warehouse. If it is really necessary to set it in the warehouse, it should be set in the shaft with a fire resistance limit of not less than 2.00h and on the shaft wall. The entrance to the indoor and outdoor lifting facilities leading to the warehouse shall be provided with Class B fire doors or fire shutters in accordance with Article 6.5.3 of this specification.