Load Combinations for Structural Design

 Load Combinations for Structural Design

 Load Combinations for Structural Design

1. Limit State of Collapse

Load Combination	Factor
Dead Load (DL) + Live Load (LL)	1.5
Dead Load (DL) + Wind Load (WL) / Earthquake Load (EL)	1.5
Dead Load (DL) (for stress reversal cases)	0.9
Dead Load (DL) + Live Load (LL) + Wind Load (WL) / Earthquake Load (EL)	1.2

 

2. Limit State of Serviceability

Load Combination	Factor
Dead Load (DL)	1.0
Live Load (LL)	1.0
Wind Load (WL) / Earthquake Load (EL)	1.0
Dead Load (DL) + Wind Load (WL) / Earthquake Load (EL)	0.8

 

Relevant IS Codes for Structural Design

IS Code	Purpose
IS 875	Load calculations
IS 1843	Prestressed concrete design
IS 1893	Earthquake-resistant design
IS 3370	Liquid retaining structures