Question

For the section of the beam shown in the given
figure, span of the beam = 6.0 m, concrete = M 20, steel = Fe 415.



If the section is checked for serviceability limit state
of deflection, then it wiil be found that

• A. the section is unsafe
• B. the section needs revision
• C. the section is safe
• D. it cannot be judged from the given data

Answer 1

The correct option is D it cannot be judged from the given data

The final deflection is limited to span/250 or 20 mm whichever is less.
So limiting deflection = 17 .1 mm
Dead load of beam
$=(0.15\times 1.25+0.25\times 0.2)\times 25=5.94kN/m$
The live load is also needed to calculate short term deflection. Therefore it can not be judged from the given data.