(i) Protection of property: Exposure protect compartment. Cancelling spaces, structural protection.

Protection of life, dead end limits 10.7 M.

Travel limit to exit unsprinkled 30.5 M. on sprinkled 45.7m.

(ii) Continuity of operation.

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(iii) Structure component undergo thermal degradation leading to catastrophic failure i.e. collapse of walls, floors, ceilings.

Fire spread 1100% in first 4 minutes. Ceiling temperature 80″ F. After 60 seconds, ceiling temperature 135″ F. After 120 seconds 350″ F. ceiling tempera­ture, floor temperature 115″ F. After 180 seconds ceiling temperature 775″ F. floor temperature 225″ F. After 240 seconds ceiling temperature 1000″ F to 1500″ F.

The visible and facility elements of fire can cause burns dehydration. Heat exhaustion and fluid locking of the reciprocating tract but they are responsible for 1/4 of the deaths caused by thermal products, smoke & gases.