Concrete Technology and Design of Concrete Structures
Due to circumferential action of the spiral in a spirally reinforced column

Capacity of column is decreased but ductility of column increases
Capacity of column is decreased
Both the capacity of column and ductility of column increase
Ductility of column reduces

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Concrete Technology and Design of Concrete Structures
High carbon content in the steel causes

increase in both tensile strength and ductility
decrease in tensile strength but increase in ductility
increase in tensile strength but decrease in ductility
decrease in both tensile strength and ductility

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

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