engineering recuitment UKPSC AE Civil 2021 Mock Test (Re-Exam) Design of Steel Structures Roof Truss
For the overall cost of roof trusses to be minimum, the cost of trusses should be equal to-
1
twice the cost of purlins plus the cost of roof coverings
2
twice the cost of roof covering plus the cost of purlins
3
the cost of roof coverings plus the cost of purlins
4
twice the cost of purlins plus twice the cost of roof coverings