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Reinforced Cement Concrete

Deflections of PSC Beams

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Question

What is the allowable upward deflection in a prestress concrete member under serviceability limit state condition?

A

Span/250

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B

Span/300

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C

Span/350

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D

Span/500

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Solution

The correct option is B Span/300
As per IS: 1343-1980 (code of practice for prestressed concrete), if finishes are to be applied to the prestressed concrete members, the total upward deflection should not exceed span/300, unless uniformity of camber between adjacent units can be insured.

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