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Question
A beam is designed using M 20 grade concrete and Fe415 is used for the tension reinforcement. If the diameter of the main steel is 12 mm, what is the minimum value of the development length (Ld) in mm to be provided in the support section?
A.
300
B.
470
C.
564
D.
260
Answer ( Option C)

564

Solution

Grade of concrete = M20

Grade of steel = Fe415

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