GB 50045-1995 Code for fire protection design of high-rise civil buildings
Some standard content:
National Standard of the People's Republic of China
Code for fire protection design of tall buildings
Code for fire protection design of tall buildings GB50045-95
(2005 Edition)
Editor: Ministry of Public Security of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: November 1, 1995
Note: The part with * is revised according to the Notice of Partial Revision of National Standards for Engineering Construction No. 20 issued by the Ministry of Construction of the People's Republic of China on March 8, 1999. The part with red font is revised according to the Notice of Partial Revision of National Standards for Engineering Construction No. 28 issued by the Ministry of Construction of the People's Republic of China on April 1, 2001. Announcement of the Ministry of Construction of the People's Republic of China
No. 361
Announcement of the Ministry of Construction on the promulgation of the partial revision of the national standard "Code for Design of Fire Protection of High-rise Civil Buildings" The partial revision of the "Code for Design of Fire Protection of High-rise Civil Buildings" GB50045-95 (2001 edition) is hereby approved for implementation from October 1, 2005. Among them, Articles 3.0.1, 3.0.2, 3.0.8, 4.1.2, 4.1.3, 4.1.12, 4.2.7, 4.3.1, 6.1.1, 6.1.11, (1, 2, 3, 5, 6), 6.1.16, 7.4.2, 7.4.6, (1, 2, 7, 8), 7.6.1, 7.6.2, 7.6.3, 7.6.4, 9.1.1, 9.1.4 (1, 2, 3), 9.4.1, 9.4.2 are mandatory provisions and must be strictly enforced. The original provisions amended this time are abolished at the same time. The partially revised provisions and specific contents will be published in the "Engineering Construction Standardization" publication to be published soon. Ministry of Construction of the People's Republic of China
July 15, 2005
1 General provisions
2 Terms
3 Building classification and fire resistance rating
4 General layout and plan layout
4.1 General provisions
4.2 Fire separation distance
4.3 Fire lane
5 Fire and smoke partitions and building structure
5.1 Fire and smoke partitions
5.2 Fire walls, partitions and floors
|5.3 Elevator shaft and pipe shaft
5.4 Fire doors, fire windows and fire shutters
5.5 Metal load-bearing components and expansion joints on the roof
6 Safe evacuation and fire elevators
6.1 General provisions
6.2 Evacuation stairwells and stairs
6.3 Fire elevators
7 Fire water supply and fire extinguishing equipment
7.1 General provisions
7.2 Fire water consumption
7.3 Outdoor fire water supply pipelines, fire Pools and outdoor fire hydrants 7.4 Indoor fire water supply pipelines, indoor fire hydrants and fire water tanks 7.5 Fire pump room and fire pumps
7.6 Fire extinguishing equipment
8 Smoke prevention, smoke exhaust, ventilation and air conditioning
8.1 General provisions
8.2 Natural smoke exhaust
8.3 Mechanical smoke prevention
8.4 Mechanical smoke exhaust
8.5 Ventilation and air conditioning
9 Electrical
9.1 Fire power supply and its distribution ||tt ||9.2 Fire emergency lighting and evacuation signs 9.3 Lamps
9.4 Automatic fire alarm system, fire emergency broadcast and fire control room 9.5 Leakage fire alarm system
Appendix A Combustion performance and fire resistance limit of various building components Appendix B Explanation of terms used in this code
Additional instructions
1 General
1.0.1 This code is formulated to prevent and reduce the hazards of fires in high-rise civil buildings (hereinafter referred to as high-rise buildings) and protect the safety of people and property.
1.0.2 The fire protection design of high-rise buildings must follow the fire protection work principle of "prevention first, prevention and fire control combined", based on the characteristics of fires in high-rise buildings, based on self-prevention and self-rescue, adopt reliable fire prevention measures, and ensure safety, applicability, advanced technology and economic rationality.
1.0.3 This code applies to the following newly built, expanded and renovated high-rise buildings and their skirt buildings: 1.0.3.1 Residential buildings with ten floors or more (including residential buildings with commercial service outlets on the first floor); 1.0.3.2 Public buildings with a building height exceeding 24m. 1.0.4 This code does not apply to public buildings such as gymnasiums, halls, theaters, etc. with a single-story main building height exceeding 24m, as well as civil air-raid shelters in high-rise buildings.
1.0.5 When the building height of a high-rise building exceeds 250m, the special fire prevention measures adopted in the building design shall be submitted to the national fire protection department for special research and demonstration. 1.0.6 In addition to implementing the provisions of this code, the fire prevention design of high-rise buildings shall also comply with the provisions of the current relevant national standards. 2 Terminology
2.0.1 Skirt building
An ancillary building connected to a high-rise building with a building height not exceeding 24m. 2.0.2 Building height buildingaltitude The height from the outdoor ground of the building to its eaves or roof surface. The water tank room, elevator room, smoke exhaust room and stair exit room on the roof are not included in the building height. 2.0.3 Duration of fireresistance The fire resistance test of building components is carried out according to the time-temperature standard curve. The time from the time of being affected by fire to the time of losing the supporting capacity or integrity being destroyed or losing the fire-proof function is expressed in hours. 2.o.4 Non-combustible component Building components made of non-combustible materials. 2.o.5 Hard-combustible component Building components made of hard-combustible materials or made of combustible materials with non-combustible materials as protective layers. 2.o.6 Combustible component Building components made of combustible materials.
2.0.7 Multiple-use building Public buildings composed of floors with two or more uses. 2.0.8 Business-living building A high-rise building with a commercial business hall and residences at the bottom 2.0.9 Large-scale power dispatchers building A working building that can dispatch power business of several provinces (regions) 2.0.10 High-grade hotel A hotel with star-rated conditions and equipped with air conditioning system. 2.0.11 High-grade residence A residence with high building decoration standards and air conditioning system. 2.o.12 Important office building, laboratory, archive building Important office building, laboratory, archive building Office building with important nature, high building decoration standards, valuable equipment and materials, high fire risk, large losses and impact after fire. 2.0.13 Semi-basement
The height of the room ground plane below the outdoor ground plane exceeds 1/3 of the room's net height, but not more than 1/2. 2.0.14 Basement
The height of the room ground plane below the outdoor ground plane exceeds half of the room's net height. 2.0.15 Safety exit safetyexit
Stairs or exits directly to the outdoor ground level that ensure the safe escape of personnel. 2.0.16 Smoke barrier hangwa11
Fixed or movable smoke barrier facilities made of non-combustible materials and hanging down from the ceiling by no less than 500mm. Movable smoke barrier refers to the smoke barrier that automatically hangs down due to the action of temperature, smoke or other control equipment in the event of a fire. 2.0.17 Commercial serving cubicle commercial serving cubicle Department stores, grocery stores, grain stores, post offices, savings banks, barber shops and other small commercial service rooms set up at the bottom (ground) of residential buildings. The number of floors of this room shall not exceed two and the building area shall not exceed 300m2. It shall be completely separated from the residential buildings and other rooms by floor slabs with a fire resistance limit of more than 1.50h and partition walls with a fire resistance limit of more than 2.00h and no door or window openings. The escape stairs and safety exits of this room and the residential buildings shall be set up separately. 3 Building classification and fire resistance rating
3.0.1 High-rise buildings should be classified according to their use, fire hazard, evacuation and remediation difficulty, etc. and should comply with Table 3.0.1.
Building classification
Residential buildings
Public buildings
High-end residential buildings
Ordinary residential buildings with 19 floors or more 1. Hospitals
2. High-end hotels
3. Commercial buildings, exhibition buildings, comprehensive buildings, telecommunication buildings, and financial and trade buildings with a building area of more than 1,000 m2 on any floor of a building that is more than 50 m or more than 24 m
4. Commercial and residential buildings with a building area of more than 1,500 m2 on any floor of a building that is more than 50 m or more than 24 m
5. Central and provincial (including separately planned cities) radio and television buildings
6. Network bureau-level and provincial (including separately planned cities) power dispatching buildings
7. Provincial (including separately planned cities) postal buildings and disaster prevention command and dispatching buildings
8. Libraries and bookstores with a collection of more than 1 million books 9. Important office buildings, scientific research buildings, archives buildings 10. Teaching buildings with a building height of more than 50m and ordinary hotels, office buildings, scientific research buildings, archives buildings, etc. Category II
Ordinary residential buildings with 10 to 18 floors
1. Commercial buildings, exhibition buildings, comprehensive buildings, telecommunications buildings, financial and trade buildings, commercial and residential buildings, libraries, bookstores, except for Category I buildings
2. Postal buildings below the provincial level, disaster prevention command and dispatch buildings, radio and television buildings, power dispatch buildings
3. Teaching buildings with a building height of no more than 50m and ordinary hotels, office buildings, scientific research buildings, archives buildings, etc. 3.0.2 The fire resistance level of high-rise buildings shall be divided into Grade I and Grade II, and the combustion performance and fire resistance limit of their building components shall not be lower than the provisions of Table 3.0.2.
The combustion performance and fire resistance limit of various building components can be determined according to Appendix A. Combustion performance and fire resistance of building components Combustion performance and fire resistance (h) Component name Firewall Load-bearing wall, stairwell wall, stairwell wall and wall between residential units, residential partition wall Non-load-bearing exterior wall, partition walls on both sides of evacuation corridor Room partition wall Floor slab, evacuation staircase, roof load-bearing component suspended ceiling Non-combustible body 3.00 Non-combustible body 2.00 Non-combustible body 1.00 Non-combustible body 0.75 Non-combustible body 3.00 Non-combustible body 2 .00
Non-combustible body1.50
Non-combustible body0.25
Fire resistance grade
Non-combustible body3.00
Non-combustible body2.00
Non-combustible body1.00
Non-combustible body0.50
Non-combustible body2.50Www.bzxZ.net
Non-combustible body1.50
Non-combustible body1.00
Non-combustible body0.25
3.0.3 The joint gaps of prefabricated reinforced concrete components or the exposed parts of the joints of metal load-bearing components must be equipped with a fireproof protective layer, and its fire resistance limit shall not be lower than the fire resistance limit of the corresponding building components in Table 3.0.2 of this code. 3.0.4 The fire resistance level of Class I high-rise buildings shall be Class I, and the fire resistance level of Class II high-rise buildings shall not be lower than Class II. The fire resistance level of the podium shall not be lower than Class II. The fire resistance rating of the basement of a high-rise building shall be level one. 3.0.5 In high-rise buildings with level two fire resistance rating, room partition walls with an area not exceeding 100m2 may be made of difficult-to-burn materials with a fire resistance limit of not less than 0.50h or non-combustible materials with a fire resistance limit of not less than 0.30h. 3.0.6 For the podium of a high-rise building with level two fire resistance rating, when no one is on the roof, the load-bearing components of the roof may be made of non-combustible materials with a fire resistance limit of not less than 0.50h.
3.0.7 In a room in a high-rise building where the average weight of combustibles stored exceeds 200kg/m2, when no automatic fire extinguishing system is installed, the fire resistance limit of its columns, beams, floor slabs and walls shall be increased by 0.50h in accordance with the provisions of Article 3.0.2 of this Code. 3.0.8 The setting of glass curtain walls shall comply with the following provisions: 3.0.8.1 The filling materials of the wall between windows and the wall of the window sill shall be non-combustible materials. When the exterior wall surface is made of non-combustible bodies with a fire resistance limit of not less than 1.00h, the filling materials inside the wall can be flame-retardant materials. 3.0.8.2 For building curtain walls with no window partition walls and window sill walls with a height of less than 0.80m, a non-combustible solid skirt wall or fireproof glass skirt wall with a fire resistance limit of not less than 1.00h and a height of not less than 0.80m should be set at the outer edge of each floor slab. 3.0.8.3 The gaps between the glass curtain wall and each floor slab and partition wall should be sealed with fireproof blocking materials. 3.0.9 The interior decoration of high-rise buildings shall be carried out in accordance with the relevant provisions of the current national standard "Fire Protection Code for Interior Decoration Design of Buildings".
4 General layout and plane arrangement
4.1 General provisions
4.1.1 When conducting the general layout design, the location, fire separation distance, fire lane and fire water source of high-rise buildings shall be reasonably determined according to urban planning.
High-rise buildings should not be located near Class A and B fire hazard factories (warehouses), Class A, B and C liquid and flammable gas storage tanks, and flammable material yards.
Note: The fire hazard classification of factories and warehouses and the division of Class A, B and C liquids should be implemented in accordance with the relevant provisions of the current national standard "Code for Fire Protection Design of Buildings".
4.1.2 Oil or gas boilers, oil-immersed power transformers, high-voltage capacitors filled with flammable oil, and multi-oil switches should be installed in special rooms outside high-rise buildings.
When the above equipment needs to be arranged adjacent to high-rise buildings due to conditions, it should be installed in a building with a fire resistance level of not less than Class II, and should be separated from the high-rise building by a fire wall, and should not be adjacent to crowded places. When the above equipment needs to be arranged in a high-rise building due to conditions, it should not be arranged on the upper, lower or adjacent floor of a crowded place, and should comply with the following regulations: 4.1.2.1 Oil and gas boiler rooms and transformer rooms should be arranged on the first floor or underground floor of the building near the outer wall: However, normal (negative) pressure oil and gas boilers can be set on the second underground floor. When the distance between the normal (negative) pressure gas boiler room and the safety exit is greater than 6.00m, it can be set on the top of the floor. Boilers that use combustible gas with a relative density (ratio to air density) greater than or equal to 0.75 as fuel shall not be installed in the basement or semi-basement of a building;
4.1.2.2 The doors of the boiler room and transformer room shall lead directly to the outdoors or to the emergency exit; non-combustible fireproof eaves with a width of not less than 1.0m or window sill walls with a height of not less than 1.20m shall be installed above the doors, windows and other openings on the exterior walls. 4.1.2.3 The boiler room and transformer room shall be separated from other parts by non-combustible partition walls with a fire resistance limit of not less than 2.00h and floor slabs with a fire resistance limit of 1.50h. No openings should be made in partition walls and floor slabs. When doors and windows must be opened on partition walls, fire-resistant doors and windows with a fire resistance limit of not less than 1.20m should be installed; 4.1.2.4 When an oil storage room is installed in the boiler room, its total storage capacity should not be greater than 1.00m3, and the oil storage room should be separated from the boiler room by a fire wall; when a door must be opened on the fire wall, a Class A fire door should be installed; 4.1.2.5 Transformer rooms and transformer rooms and distribution rooms should be separated by non-combustible walls with a fire resistance limit of not less than 2.00h:
4.1.2.6 Oil-immersed power transformers, multi-oil switch rooms, and high-voltage capacitor rooms should be equipped with facilities to prevent oil from spilling. An emergency oil storage facility that can store all the oil in the transformer should be installed under the oil-immersed power transformer; 4.1.2.7 The capacity of the boiler should comply with the provisions of the current national standard "Boiler Room Design Code" GB50041. The total capacity of oil-immersed power transformers should not be greater than 1260KVA, and the capacity of a single unit should not be greater than 630KVA; 4.1.2.8 Fire alarm devices and automatic fire extinguishing systems other than halogenated hydrocarbons should be installed 4.1.2.9 Gas and oil-fired boiler rooms should be equipped with explosion-proof pressure relief facilities and independent ventilation systems. When gas is used as fuel, the ventilation capacity shall not be less than 6 times/h, and the emergency ventilation capacity shall not be less than 12 times/h; when oil is used as fuel, the ventilation capacity shall be less than 3 times/h, and the emergency ventilation capacity shall not be less than 6 times/h. 4.1.3 When the diesel generator room is arranged in a high-rise building or podium, it shall comply with the following regulations 4.1.3.1 It can be arranged on the first floor or the first or second underground floors of the building, and should not be arranged on the third underground floor and below. The flash point of diesel should not be less than 55℃
4.1.3.2 It should be separated from other parts by partition walls with a fire resistance limit of not less than 2.00h and floors with a fire resistance limit of 1.50h, and the doors should be Class A fire doors;
4.1.3.3 An oil storage room should be set up in the machine room, and its total storage capacity should not exceed the required amount of 8.00h, and the oil storage room should be separated from the generator room by a fire wall: When it is necessary to open the door on the fire wall, a Class A fire door that can be closed automatically should be installed. 4.1.3.4 An automatic fire alarm system and an automatic fire extinguishing system other than halogenated hydrocarbons 1211 and 1301 should be installed. 4.1.4 The fire control room shall be located on the first floor or underground floor of a high-rise building and shall be separated from other parts by partition walls with a fire resistance limit of not less than 2.00h and floor slabs with a fire resistance limit of 1.50h, and shall have a safety exit directly leading to the outdoors. 4.1.5 Audience halls, conference halls, multi-function halls and other crowded places in high-rise buildings shall be located on the first floor or the second or third floor: When it must be located on other floors, in addition to the provisions of this code, the following provisions shall be met: 4.1.5.1 The building area of a hall or room should not exceed 400m2. 4.1.5.2 There shall be no less than two safety exits in a hall or room. 4.1.5.3 Automatic fire alarm system and automatic sprinkler system must be installed. 4.1.5.4 Screens and curtains should be made of flame-retardant fabrics. 4.1.5A Dance halls, karaoke halls (including restaurants with karaoke functions), nightclubs, video halls, projection halls, saunas (except bathing areas), amusement halls (including electronic amusement halls), Internet cafes and other places of singing, dancing, entertainment, projection and amusement (hereinafter referred to as singing, dancing, entertainment, projection and amusement places) in high-rise buildings should be located on the first floor or the second or third floor. They should be set up against the outer wall and should not be arranged on both sides and at the end of the dead-end corridor. The maximum capacity is 1.0 person/m2 for video halls and projection halls, and 0.5 person/m2 for other places. The area is calculated according to the building area of the hall. They should be separated from other places by partition walls with a fire resistance limit of not less than 2.00h and floor slabs with a fire resistance limit of 1.00h. When doors must be opened on the walls, fire doors of not less than Class B should be installed. When it must be set up on other floors, it shall also comply with the following provisions: 4.1.5.A.1 It shall not be set up on the second underground floor or below. When it is set up on the first underground floor, the height difference between the ground of the first underground floor and the outdoor entrance and exit floor shall not be greater than 10m; 4.1.5.A.2 The building area of a hall or room shall not exceed 200m2 4.1.5.A.3 There shall be no less than two exits in a hall or room. When the building area of a hall or room is less than 50m2, one exit may be set up:
4.1.5.A.4 An automatic fire alarm system and an automatic sprinkler fire extinguishing system shall be installed. 4.1.5.A.5 Smoke prevention and exhaust facilities shall be installed and shall comply with the relevant provisions of this code. 4.1.5.A.6 Luminous evacuation signs shall be installed on the ground or on the wall close to the ground of evacuation corridors and other main evacuation routes.
4.1.5B Underground stores shall comply with the following provisions: 4.1.5B.1 The business hall should not be located on the third underground floor or below; 4.1.5B.2 Commodities with fire hazards of Class A and Class B storage items should not be sold or stored; 4.1.5B.3 An automatic fire alarm system and an automatic sprinkler fire extinguishing system should be installed; 4.1.5B.4 When the total construction area of a store is greater than 20,000m2, it should be separated by a fire wall, and no door or window openings should be opened on the fire wall;
4.1.5B.5 Smoke prevention and exhaust facilities should be installed and should comply with the relevant provisions of this code; 4.1.5B.6 Luminous evacuation signs should be installed on the ground or on the walls close to the ground of evacuation corridors and other main evacuation routes.
4.1.6 Nurseries, kindergartens, amusement halls and other places for children's activities should not be set up in high-rise buildings. When they must be set up in high-rise buildings, they should be set up on the first floor or the second or third floor of the building, and separate entrances and exits should be set up. 4.1.7 The bottom side of a high-rise building should have at least one long side or 1/4 of the perimeter length and less than one long side. It should not be arranged with a podium with a height greater than 5.00m and a depth greater than 4.00m, and there must be a staircase leading directly to the outside or an exit leading directly to the stairwell within this range.
4.1.8 The design of the car parking garage located in a high-rise building should comply with the provisions of the current national standard "Fire Protection Code for Design of Car Garages, Repair Garages and Parking Lots" GB50067. 4.1.9 When flammable gas is used as fuel in a high-rise building, pipeline gas supply should be adopted. Rooms or parts where flammable gas is used should be set close to the outer wall.
4.1.10 When Class C liquid is used as fuel in high-rise buildings, the following provisions shall be met: 4.1.10.1 The total storage capacity of liquid storage tanks shall not exceed 15m. When directly buried near high-rise buildings or podiums, and the outer wall of the building within 4.00m facing the oil tank is a fire wall, the fire separation distance may not be limited. 4.1.10.2 The volume of the intermediate tank shall not be greater than 1.00m, and it shall be located in a separate room with a fire resistance rating of not less than Level 2. The door of the room shall be a Class A fire door.
4.1.11 When bottled liquefied petroleum gas is used as fuel in high-rise buildings, a centralized bottled liquefied petroleum gas room shall be set up, and the following provisions shall be met:
4.1.11.1 Bottled liquefied petroleum gas rooms with a total storage capacity of no more than 1.00m may be built adjacent to the podium. 4.1.11.2 Bottled liquefied petroleum gas rooms with a total storage capacity exceeding 1.00m3 but not exceeding 3.00m3 shall be built independently, and the fire protection distance from high-rise buildings and podiums shall not be less than 10m. 4.1.11.3 Automatic emergency shut-off valves shall be installed on the main air inlet and outlet pipes. 4.1.11.4 A combustible gas concentration alarm device shall be installed. 4.1.11.5 Electrical design shall be carried out in accordance with the relevant provisions of the current national standard "Design Code for Electrical Installations in Explosive and Fire Hazardous Environments".
4.1.11.6 Other requirements shall be carried out in accordance with the relevant provisions of the current national standard "Code for Fire Protection Design of Buildings". 4.1.12 The fuel supply pipelines of boilers and diesel generators installed in buildings shall comply with the following provisions: 4.1.12.1 Automatic and manual shut-off valves shall be installed before entering the building and in the equipment room; 4.1.12.2 The oil tank in the oil storage room shall be sealed and a vent pipe leading to the outside shall be installed. The vent pipe shall be equipped with a breathing valve with a flame arrester. Facilities to prevent oil from spreading shall be installed at the bottom of the oil tank. 4.1.12.3 The laying of fuel supply pipelines shall comply with the provisions of the current national standard "Urban Gas Design Code" GB50028.
4.2 Fire separation distance
4.2.1 The fire separation distance between high-rise buildings and between high-rise buildings and other civil buildings shall not be less than the provisions of Table 4.2.1. Fire separation distance between high-rise buildings and between high-rise buildings and other civil buildings (m)Other civil buildings
Building categories
High-rise buildings
High-rise buildings
First and second levels
Fire resistance level
Note: Fire separation distance shall be calculated based on the shortest distance between the exterior walls of adjacent buildings: When there are protruding combustible components on the exterior walls, it shall be calculated from the outer edge of the protruding part. 4.2.2 When two high-rise buildings or high-rise buildings are adjacent to single-story or multi-story civil buildings with a fire resistance level of not less than second level, when the exterior wall of the higher side is a fire wall or the wall within a range of 15.00m or less higher than the roof of the adjacent lower building is a fire wall without door or window openings, the fire separation distance may be unlimited. 4.2.3 Where two high-rise buildings or high-rise buildings are adjacent to single-storey or multi-storey civil buildings with a fire resistance rating of not less than Level 2, when the roof of the lower building does not have windows, the fire resistance limit of the roof bearing components is not less than 1.00h, and the adjacent lower outer wall is a fire wall, the fire separation distance between them can be appropriately reduced, but should not be less than 4.00m. 4.2.4 Where two high-rise buildings or high-rise buildings are adjacent to single-storey or multi-storey civil buildings with a fire resistance rating of not less than Level 2, when the fire resistance limit of the adjacent higher outer wall is not less than 2.00h, and the openings on the wall are equipped with Class A fire doors, windows or fire shutters, the fire separation distance between them can be appropriately reduced, but should not be less than 4.00m. 4.2.5 The fire separation distance between high-rise buildings and small Class A, B, C liquid storage tanks, combustible gas storage tanks and chemical flammable goods warehouses should not be less than the provisions of Table 4.2.5.
Name and capacity of fire separation distances between high-rise buildings and small Class A, B and C liquid storage tanks, flammable gas storage tanks and chemical flammable goods warehouses
Small Class A and B
Liquid storage tanks
Small Class C
Liquid storage tanks
Flammable gas
Chemical flammable
Warehouses
30~60m
150~200m
100~500m
High-rise buildings
Note: ①The fire separation distance of storage tanks should be calculated from the outer wall of the storage tank closest to the building; Fire separation distance (m)
②When Class A, B and C liquid storage tanks are directly buried, the fire separation distance in this table can be reduced by 50%. Podium
4.2.6 When the total capacity of liquid oxygen storage tanks in high-rise hospitals does not exceed 3.00m, the tank room can be built adjacent to the outer wall of the high-rise building, but it should be separated by a fire wall and an exit directly to the outside should be provided. 4.2.7 The fire separation distance between high-rise buildings and factory (warehouse) buildings should not be less than the provisions of Table 4.2.7. Class C
Fire separation distance between high-rise buildings and factory (warehouse) buildings (m) Factory (warehouse) buildings
Fire resistance level
Class D, E
Fire resistance level
, Class II
Class III, IV
High-rise buildings
High-rise buildings
4.2.8 The fire protection distance between high-rise civil buildings and gas pressure regulating stations, liquefied petroleum gas vaporization stations, gas mixing stations and urban liquefied petroleum gas supply station cylinder warehouses shall be implemented in accordance with the relevant provisions of the "Urban Gas Design Code" GB50028. 4.3 Fire Lanes
4.3.1 A circular fire lane shall be set up around high-rise buildings. When it is difficult to set up a circular lane, a fire lane can be set up along the two long sides of the high-rise building. When the length of the building along the street exceeds 150m or the total length exceeds 220m, a fire lane passing through the building should be set up at an appropriate position.
When a high-rise building with a closed inner courtyard or patio is along the street, a pedestrian passage connecting the street and the inner courtyard (staircases can be used), and the distance should not exceed 80m.
4.3.2 When the short side length of the inner courtyard or patio of a high-rise building exceeds 24m, a fire lane entering the inner courtyard or patio should be set up.
4.3.3 Fire truck lanes should be set up for natural water sources and fire water pools for fire trucks to draw water. 4.3.4 The width of the fire truck lane should not be less than 4.00m. The distance between the fire truck lane and the outer wall of the high-rise building should be greater than 5.00m, and there should be no obstacles within 4.00m above the fire truck lane. 4.3.5 Dead-end fire truck lanes should be equipped with a turnaround lane or turnaround yard, and the turnaround yard should not be less than 15m×15m. The turnaround yard for large fire trucks should not be less than 18m×18m.
Pipes and culverts under the fire truck lane should be able to withstand the pressure of fire trucks. 4.3.6 The net width and clearance height of the fire truck lane passing through a high-rise building should not be less than 4.00m. 4.3.7 Trees, overhead pipelines, etc. that may hinder the operation of high-rise fire trucks should not be set up between the fire truck lane and the high-rise building. 5 Fire and smoke partitions and building structures
5.1 Fire and smoke partitions
5.1.1 Fire walls should be used to divide fire partitions in high-rise buildings. The maximum building area allowed for each fire partition should not exceed the provisions of Table 5.1.1.
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