Usually comprised of an open, three-dimensional steel frame in which the framing members have been welded together. The steel is typically lightweight and, because of its configuration, allows for the passage of electrical and plumbing lines as well as heating or cooling ductwork.
Sheathing.
Roof cover or any vertical supports.
Enter the following for this component:
Percent of Total Floor Area: 1 – 100, or
Roof Area (Square Feet)
Roof Structure