Link points to Internet Archive / others. Not hosted by InfraLens. Details
IS 11057:2004 is the Indian Standard (BIS) for recommendations for fire safety of buildings — general principles of fire grading and classification. IS 11057 provides the framework for fire grading of buildings and fire resistance classification of building elements. Type 1 (fire resistive) to Type 5 (wood frame). Specifies minimum fire resistance ratings (1-4 hours) for walls, floors, columns, and beams based on building type.
Recommendations for fire grading of buildings and classification of building materials and elements by fire resistance.
High-rise buildings (>15m) must be Type 1 (4-hour fire rating for primary structure) or Type 2 (2-hour) per NBC. This means columns, beams, floors, and walls must withstand standard fire for the rated duration.