This tool helps determine construction requirements for Group B occupancies (Care, Treatment, Detention) per NBC 2020 Division B 3.2.2. Final compliance must be verified by a qualified professional.
Building Configuration
Compliance Results
Reference Tables
Division
Storeys
Sprinklered
Max Area (m²)
Construction
Division
Noncombustible
Combustible
Mixed
Division 1
Any height
Not permitted
Not permitted
Division 2
Any height
Limited (see area table)
Limited (see area table)
Division 3
Any height
Limited (see area table)
Limited (see area table)
Division
Floors
Mezzanines
Loadbearing Walls
Division 1
2 hr (1 hr if ≤3 storeys)
1 hr
Match supported
Division 2
2 hr (1 hr if ≤3 storeys, 45 min if ≤2 storeys combustible)
1 hr (45 min if combustible)
Match supported
Division 3
2 hr (1 hr if ≤3 storeys, 45 min if ≤2 storeys combustible)