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

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

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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 remain unchanged
both forces of tension and compres-sion as well as lever arm change

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