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A beam shall be deemed to be a deep beam when the ratio of effective span to overall depth is less than ______  and ______ for simply supported beam and continous beam, respectively.
1. 7, 26
2. 2.5, 2.0
3. 2.0, 2.5
4. 26, 7.0

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Correct Answer - Option 3 : 2.0, 2.5

Explanation:

According to IS 456-2000 a beam shall be deemed to be a deep beam when the ratio of effective span-to-overall depth, l/D is less than:

1) 2.0, for simply supported beam; and

2) 2.5, for a continuous beam.

Though different codes define deep beams in different clear span-to-depth ratios, as a general rule deep beams are recognized by their relatively small span-to-depth ratio.

Hence, Deep beams are designed for bending moment and checked for shear.

Reference: IS 456:2000 page 51.

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