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Fire doors -
What is resistance & rating? Resistance can be defined as the ability to withstand the exposure of fire in terms of 3 criteria
❖ Stability – structural stability
❖ Integrity – penetration of flames & gases
❖ Insulation – temperature rise on the unexposed side
Fire rated wall
Exposed side 
(fire side)
Un- Exposed side
Fire doorRating is the time duration 
to which it can withstand