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The economical spacing of roof trusses works out to be _________ span.

The economical spacing of roof trusses works out to be _________ span. Correct Answer 1/3 to 1/5 span

The economical spacing of roof trusses works out to be 1/3 to 1/5 of the span. A structure that is composed of a number of line numbers connected at the ends to form a triangulated framework is called a truss.

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If the cost of purlins/unit area is p and the cost of roof covering/unit area is r, then cost of trusses/unit area for an economical spacing of the roof trusses will be
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In how many ways can 5 different toys be packed in 3 identical boxes such that no box is empty, if any of the boxes may hold all of the toys?

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i) shear force at mid span is zero
ii) shear force at mid span is maximum
iii) torsion at mid span is zero
iv) torsion at mid span is maximum
The correct answer is
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