Here structure detail of roof and framing details Usually made from 1?2-inch plywood, the decking closes and reinforces the roof structure and provides a nailbed for the shingles. The four components that make up a roofing system are shingles, underlayment, starter shingles and hip and ridge shingles. A framed structure in any material is one that is made stable by a skeleton that is able to stand by itself as a rigid structure without depending on floors or walls to resist deformation. Also show dimension detail for more details of Structure detail of roof and framing details download this file.