RCC Structures Design
The design of heel slab of a retaining wall is based on the maximum bending moment due to:

Weight of the soil above it
Its own weight
Load of the surcharge, if any
All listed here

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RCC Structures Design
A pre-stressed concrete member is preferred because

All listed here
Large size of long beams carrying large shear force need not be adopted
Its dimensions are not decided from the diagonal tensile stress
Removal of cracks in the members due to shrinkage

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

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