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RCC Structures Design - Engineering

Q1:

For stairs spanning horizontally, the minimum waist provided is

A 4 cm

B 6 cm

C 8 cm

D 10 cm

E 12 cm.

ANS:E - 12 cm.

Spanning horizontally is nothing but considering the design as a horizontal slab. Waist slab is the minimum distance of the stair upper surface to the lower slab bottom. That can be decided by the design. But for an RCC minimum slab width must be greater than 3.5 inches so we can say 80 mm.