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UPSC Civil Service Exam Questions - Engineering

Q1:

A T-beam roof section has the following particulars :
Thickness of slab 100 mm
Width of rib 300 mm
Depth of beam 500 mm
Centre to centre distance of beams 3.0 m
Effective span of beams 6.0 m
Distance between points of contraflexure is 3.60 m.
The effective width of flange of the beam is

A 3000 mm

B 1900 mm

C 1600 mm

D 1500 mm

ANS:D - 1500 mm

bw = width of rib = 300mm.
Lo= distance between point of zero bending moment or Distance between points of Contraflexture = 3600mm.
Df - Thickness of slab=100mm.
Bf = Lo/6 + 6Df + Be.
Bf=(3600/6) +6(100) +(300).
Bf=1600mm.