RCC Structures Design
According to the steel beam theory of doubly reinforced beams

Tension is resisted by tension steel
Compression is resisted by compression steel
Stress in tension steel equals the stress in compression steel
All of the listed here

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RCC Structures Design
In a singly reinforced beam

Steel possesses initial stresses when embedded in concrete
Elastic moduli for concrete and steel have different values within the limits of deformation of the beam
Plane sections transverse to the centre line of the beam before bending remain plane after bending
Compression is borne entirely by concrete

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