RCC Structures Design
In a singly reinforced beam

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

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RCC Structures Design
According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is

Half of the width of the slab
Three-fourth of the width of the slab
Two-third of the width of the slab
Four-fifth of the width of the slab

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