RCC Structures Design
In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called

Economic section
Critical section
Under-reinforced section
Over reinforced section

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RCC Structures Design
For a ribbed slab

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

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