Height greater than 60m residential building construction, when the use of B1-class insulation material, every few layers to set the level of fire isolation belt?
(A) residential construction should meet the following requirements: 1, height greater than or equal to 100m of the building, the insulation of the combustion properties of the material should be a bile to pick up the state. 2, the height is greater than or equal to 60m less than 100m of the building, the insulation properties of the combustion performance should not be lower than B2. When using B2 insulation material, each layer should be set to a level of fire isolation zone. 3, the height is greater than or equal to 24m less than 60m of the building, the insulation of the combustion performance should not be lower than B2. When using B2 insulation material, each two layers should be set to the level of fire isolation zone. 4, the height of less than 24m of the building, the insulation properties of the combustion performance should not be lower than the B2 level. Among them, when the use of B2-class insulation material, the three should be set up a horizontal fire isolation zone.
Now the external wall insulation materials are required to reach A level, see "Gong [2017] 65"
Drawings must have a description of ah, generally three layers
