Question

Characteristic strength used in the design and material selection is the

minimum strength

 

maximum strength

 

safe strength

 

mean strength​

Answer 1

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Answer 2

Characteristic strength used in the design and material selection is the 'minimum strength.'

•Characteristic strength is the minimum value of strength below which a specified proportion of all valid test results is expected to fail.

•This can be illustrated with an example of concrete as, if the characteristic strength of 20 MPa is applied it means that if a 20 MPa stress or low is developed in it, the probability of its failure is only 5% and the chances that for survival is 95%.