Structural Analysis
The effective length of lacing is the distance

Between the inner ends of effective lengths of welds connecting the members
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

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Structural Analysis
The effective and actual lengths of a cantilever are same if continuous at the support,

None of these
Restrained against torsion at the support and free at the end
Unstrained against torsion at the support and free at the end
With partial restraint against torsion of the support and free at the end

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