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Highway Engineering - Engineering

Q1:

Area of steel required per metre width of pavement for a length of 20 m for design wheel load 6300 kg and permissible stress in steel 1400 kg/cm2, is

A 70 kg/sq cm

B 80 kg/sq cm

C 90 kg/sq cm

D 100 kg/sq cm

ANS:C - 90 kg/sq cm

We know that,
As=LfW/2s.
As=Area of steel.
L=Length.
f=Co-efficiant of friction, here f=2.
W=Weight.
s=Working stress in steel in kg/cm2.
As=(20X2X6300) /(2X1400).
= 90 Kg/cm2.