Structural Analysis
For heavily reinforced concrete member, the nominal maximum size of the aggregates should be restricted to

5 mm less than the minimum clear distance between the main bars
Greater of A and B
5 mm less than the minimum cover to the reinforcement
Smaller of A and B

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Structural Analysis
The effective length of lacing is the distance

All of these
Between the inner end rivets of the bar for single lacing
0.7 of the distance between the inner end rivets of the bar for double lacing
Between the inner ends of effective lengths of welds connecting the members

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