Partial safety factor on concrete stresses is

Partial safety factor on concrete stresses is [A] 1.15 for concrete and 1.5 for steel [B] 1.5 for concrete and 1.15 for steel [C] 1.5 for both...

Partial safety factor on concrete stresses is





The correct answer for partial safety factor on concrete stresses is 1.5 for concrete and 1.15 for steel

Explanation:

The factor of safety:

  • It is the ratio of the ultimate strength of a member or piece of material to the actual working stress or the maximum permissible stress when in use.
  • The design strength of concrete and steel is obtained by dividing the respective characteristic strengths by appropriate partial safety factors for concrete and steel. 
    • The factor of safety = Ultimate strength/working stress
  • At ultimate loads i.e. at ultimate limit state, Partial safety factor for concrete = 1.5 Partial safety factor for steel = 1.15
  • At serviceability limit states, Partial safety factor for concrete, γc = 1 Partial safety factor for steel, γc = 1


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