Worse, the bottom chord of the truss is often hidden from clear view, buried in attic floor insulation. Our wood roof truss photo at above left shows a design that would have been less likely to collapse when walked-on. The bottom chord of the roof truss is formed by a wood floor ...
This chapter examines the general principles involved in the design of roofs; the various forms of construction and coverings; the techniques used in roof drainage and insulation; and the materials employed.
In one embodiment it is preferred that the purlins be made from fiberglass reinforced plastic; the truss support be made from galvanized steel, the roof panels be made from lightweight fiberglass; and fasteners made from stainless steel or monel. Panel removability is provided in certain embodimen...