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The length of the straight portion of a bar beyond the end of the hook, should be at least
Answer & Solution
Correct Answer:
Option
C
Reason: As per standard RCC detailing practice (IS 2502/IS 456), a hooked bar must have a straight extension beyond the hook to ensure adequate anchorage and prevent slip.
Minimum requirement: The straight portion beyond the end of the hook should be at least 4ϕ, where ϕ is the bar diameter.
Why 4ϕ? This length ensures the bearing and bond developed by the hook is effectively transferred into the concrete without premature pull-out or cracking at the bend.
Minimum requirement: The straight portion beyond the end of the hook should be at least 4ϕ, where ϕ is the bar diameter.
Why 4ϕ? This length ensures the bearing and bond developed by the hook is effectively transferred into the concrete without premature pull-out or cracking at the bend.
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LoginWhen hooks are formed in deformed bars, the internal radius of bend should be atleast 3 times the diameter of bar. & The length of the straight bar beyond the end of the curve should be atleast 4 times the diameter of the bar.