RCC Structures Design
In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as

A key
A rib
A cut-off wall
All listed here

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RCC Structures Design
If the shear stress in a R.C.C. beam is

Greater than 20 kg/cm², the size of the section is changed
Equal or less than 5 kg/cm², no shear reinforcement is provided
Greater than 4 kg/cm², but less than 20 kg/cm², shear reinforcement is provided
All of these

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