RCC Structures Design
Steel beam theory is used for

Design of simple steel beams
Beams if shear exceeds 4 times allowable shear stress
Steel beams encased in concrete
Doubly reinforced beams ignoring compressive stress in concrete

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

All of these
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
Greater than 20 kg/cm², the size of the section is changed

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