RCC Structures Design
The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon

All of the listed here
Breadth of the rib
Overall thickness of the rib
Centre to centre distance between T-beams

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RCC Structures Design
Pick up the assumption for the design of a pre-stressed concrete member from the following:

During deformation limits, Hook's law is equally applicable to concrete as well as to steel
A transverse plane section remains a plane after bending
Variation of stress in reinforcement due to changes in external loading is negligible
All listed here

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RCC Structures Design
An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus

UDL of wall + load from the roof
Triangular load of the wall
Triangular load + load from the roof
UDL of wall

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