Discussion
Assertion (A): A concrete jacket that stops at each floor adds little flexural strength.
Reason (R): Its longitudinal bars cannot develop force across the joint.
Select the correct option.
Answer: A
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the mechanism. Flexural strength comes from the longitudinal bars developing tension and compression across the critical section at the joint. A jacket stopping at the floor has nowhere to anchor those bars, so it adds confinement and shear capacity but very little flexural strength - which is why continuity through the slab is the difficult and essential detail.
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