Concrete Technology and Design of Concrete Structures
Select the incorrect statement...

None of these
The loss of prestress is more in pre-tensioning system than in post-tensioning system.
Pretensioning system has greater certainty about its durability.
For heavy loads and large spans in buildings or bridges, post-tensioning system is cheaper than pretensioning system

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

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

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