RCC Structures Design
The length of the straight portion of a bar beyond the end of the hook, should be at least

Four times the diameter
Twice the diameter
Seven times the diameter
Thrice the diameter

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RCC Structures Design
For a ribbed slab

Clear spacing between ribs shall not be greater than 4.5 cm
Width of the rib shall not be less than 7.5 cm
Overall depth of the slab shall not exceed four times the breadth of the rib
All listed here

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