RCC Structures Design
In a beam the local bond stress Sb, is equal to

Leaver arm/(Bending moment × Total perimeter of reinforcement)
Total perimeter of reinforcement/(Leaver arm × Shear force)
Leaver arm/(Shear force × Total perimeter of reinforcement)
Shear force/(Leaver arm × Total perimeter of reinforcement)

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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

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

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