Category 1 height: building height > 54m

Category II height: building height＞27m, ≤54m

Single and multiple: height ≤ 27m

E-commerce exhibitions and various other combinations with a building height of 24m or more and a building area of ​​any floor >1000m²

Building height＞50m

Medical buildings above 24m, important public buildings, and elderly care facilities in independent buildings

A library of over 24m with a collection of over one million volumes

High-rise buildings other than Category I high-rise public buildings

Building height＞24m single-story public building

Other buildings with building height ≤24m

Flat roof: outdoor design from ground to roof surface (parapet is not included)

Slope roof: (outdoor design ground to cornice ridge) ÷2

Roof auxiliary buildings occupy roof area ≤ ¼

Residential: Bicycle garage with height ≤2.2m or indoor and outdoor height difference ≤1.5m

Ability to resist collapse within a certain period of time

Flame penetration ability within a certain period of time

The back flame temperature does not exceed the specified value within a certain period of time

Firewall: 3h, 3h, 3h

Load-bearing wall: 3h, 2.5h, 2h

Stairwell, front room: 2h, 2h, 1.5h

Non-load-bearing exterior walls, room partitions: 0.75h, 0.5h, 0.5h (non-combustible)

Load-bearing wall: 3h, 2.5h, 2h

Column:3,h, 2.5h, 2h

Beam: 2,h, 1.5h, 1h

Floor: 1.5h, 1h, 0.75h

Roof weighing components: 1.5h, 1h, 0.5h (flammable)

Evacuation stairs: 1.5h, 1h, 0.75h

Suspended ceiling: 0.25h, 0.25h, 0.15h (flammable)

Civil underground semi-basement

Class I high-rise civil buildings

High-rise factory buildings, Category A and B factory buildings

Class D factory buildings with valuable machinery, meters, and instruments with sparks or red hot surfaces or open flames

Boiler room, oil-immersed transformer

High-rise warehouse, Category A warehouse, multi-story Category B warehouse, flammable liquid Category C warehouse

Single and multi-storey civil buildings and Category II high-rise buildings

Plants that use or produce Class C liquids

Expensive machines, meters, and instruments

Independent Category A and B single-story factory building with building area ≤300m'

Single-story Class C liquid factory building with building area ≤500m

Single-story Category D factory building with sparks and open flames with construction area ≤1000m

Total evaporation capacity of coal-fired boiler room ≤ 4t/h

Single and multi-story Category C factory buildings, multi-story Category E factory buildings

Single-story Category B warehouse, single-story Category C warehouse, multi-story combustible fixed Category C warehouse, multi-story Category E warehouse

Civilian buildings and elderly care facilities

Firewalls in Category A and B factories and A, B and C warehouses for 4 hours

Single-story factory warehouse with fire resistance grade 1 or 2: Column: 2.5h, 2h

The roof load-bearing components of single- and multi-story factory buildings and warehouses with a first-class fire resistance level are fully protected by self-spraying: 1h

Except for warehouses A and B, high-rise warehouses, first and second level non-load-bearing walls: non-combustible 0.5h, flame-retardant 0.25h

Second level fire resistance class factory warehouse partition wall: flame retardant: 0.75h

Prestressed floor slabs for multi-storey factory warehouses with secondary fire resistance rating: 0.75h

First and second level flat roof panels: 1.5h, 1h

For civil buildings larger than 100m, floor slab 2h