Structural Analysis
If the specified thickness of a footing is 100 cm, the depth of the form work may be tolerated from

-2 mm to +2 mm
-4 mm to +4 mm
-5 mm to +5 mm
-3 mm to +3 mm

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Structural Analysis
The effective length of lacing is the distance

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

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