Concrete Technology and Design of Concrete Structures
If the foundations of all the columns of a structure are designed on the total live and dead load basis, then

the settlement of exterior columns will be more than interior columns
there will be no differential settlement
there will be no settlement of columns
the settlement of interior columns will be more than exterior columns

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

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

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