Concrete Technology and Design of Concrete Structures
Examine the following statements :i) Factor of safety for steel should be based on its yield stress,ii) Factor of safety for steel should be based on its ultimate stress,iii) Factor of safety for concrete should be based on its yield stress,iv) Factor of safety for concrete should be based on its ultimate stress.The correct statements are

(i) and (iii)
(i) and (iv)
(ii) and (iii)
(ii) and (iv)

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Concrete Technology and Design of Concrete Structures
Minimum pitch of transverse reinforcement in a column is

lesser of the above three values
the least lateral dimension of the member
forty-eight times the diameter of transverse reinforcement
sixteen times the smallest diameter of longitudinal reinforcement bar to be tied

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Concrete Technology and Design of Concrete Structures
In prestressed concrete

forces of tension and compression change but lever arm remains unchanged
forces of tension and compressions remain unchanged but lever arm changes with the moment
both forces of tension and compres-sion as well as lever arm change
both forces of tension and compres-sion as well as lever arm remain unchanged

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