Structural Analysis
If in a rigid-jointed space frame, (6m + r) < 6j, then the frame is

Unstable
Stable and statically indeterminate
None of these
Stable and statically determinate

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Structural Analysis
The effective length of lacing is the distance

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

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