During the construction of a steel truss roof, which of the following statements are correct?
(i) Steel truss transmits self-weight and roof loads vertically on the walls.
(ii) Spacing between steel trusses are usually between 10 feet to 15 feet.
(iii) Steel trusses use reduced dead load of building making structure unstable.
1
Only (i), (ii)
2
Only (i), (iii)
3
Only (ii), (iii)
4
(i), (ii), and (iii)