GATE CE 2018 Set 2 — Question 32
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Structural Engineering → Slabs, Columns & Prestressed → Design of Slabs
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Question
A reinforced-concrete slab with effective depth of 80 mm is simply supported at two opposite ends on 230 mm thick masonry walls. The centre-to-centre distance between the walls is 3.3 m. As per IS 456 : 2000, the effective span of the slab (in m, up to two decimal places) is ______
Correct answer
3.15 to 3.15
Solution
According to IS 456:2000, the effective span () of a simply supported beam or slab is the lesser of:
Effective depth () = 80 mm = 0.08 m
Thickness of walls () = 230 mm = 0.23 m
Centre-to-centre distance = 3.3 mClear span = (Centre-to-centre distance) - = mCalculating the two criteria:
1.Clear span + effective depth ()
2.Centre-to-centre distance between supports
Given:Effective depth () = 80 mm = 0.08 m
Thickness of walls () = 230 mm = 0.23 m
Centre-to-centre distance = 3.3 mClear span = (Centre-to-centre distance) - = mCalculating the two criteria:
1.Clear span + = m
2.Centre-to-centre distance = 3.3 m
The effective span is the minimum of these two values: m.Continue learning with Success Tracker
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