WL/4
WL/6
WL/8
WL/2

## RCC Structures Design If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight 'w' per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is

h = √(W/Aw) [(1 - sin φ)/(1 + sin φ)]²
h = (W/Aw) [(1 - sin φ)/(1 + sin φ)]²
h = (W/Aw) [(1 + sin φ)/(1 + sin φ)]
h = (W/Aw) [(1 - sin φ)/(1 + sin φ)]

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

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

## RCC Structures Design If the depth of actual neutral axis of a doubly reinforced beam

Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously
Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier
All listed here
Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier

2.5
2
Less than 2.5
Less than 2

250 kg/cm²
175 kg/cm²
100 kg/cm²
49.9 kg/cm²