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

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

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Concrete Technology and Design of Concrete Structures
The diameter of ties in a column should be

More than 5 mm and also more than one-fourth of diameter of main bar
More than 5 mm but less than one-fourth of diameter of main bar
More than or equal to 5 mm
More than or equal to one fourth of diameter of main bar

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