Structural Analysis
The deflection at any point of a perfect frame can be obtained by applying a unit load at the joint in

Vertical direction
Horizontal direction
Inclined direction
The direction in which the deflection is required

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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
All of these
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

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