50
Use of fire doors in buildings -
• Four type of construction (design and material of structural and non-structural elements to 
prevent spread of fire)
Categories of construction : Types of construction
Fire Zone 3Fire zone 1
A - Residential
B - Educational
C - Institutional
D - Assembly
E - Small business E1
F - Mercantile 
E - Small business E2-E5
G - Industrial G1-G2
G – Industrial building G3
J – Hazardous building
1, 2, 3,4 1, 2, 3 1, 2
Fire Zone 2