RCC Structures Design
After pre-stressing process is completed, a loss of stress is due to

Shrinkage of concrete
Creep of concrete
All of the listed here
Elastic shortening of concrete

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RCC Structures Design
In a singly reinforced beam

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
Steel possesses initial stresses when embedded in concrete
Compression is borne entirely by concrete

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