In colomn reinforcement when dia of bar is going to change,
than what should be the lap length of bars weather it should
be of heigher dia bar lap length or it should the accordance
with new dia bar. the grade of concrete is same.
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Answer Posted / md.ifthekar pasha
ok as some are saying that it could be 50D or 47D.....but it is purely depends upon the structural design condition
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