Identify the INCORRECT statement with respect to specifications on the partial safety factors for material strength, and are used in limit state design of RC structures
1
A partial safety factor 1.5 is used for concrete under ultimate limit state
2
A higher partial safety factor has been assigned to concrete compared with reinforcing steel under the ultimate limit state.
3
A partial safety factor '1.15' is used for steel under serviceability limit state
4
A partial safety factor '1' is used for concrete under serviceability limit state