Typical Roof Framing Members

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Typical roof framing members. Using span tables as1684 2. The loads acting on a framing member or. And the line length measurement from the roof peak to the building wall is the hypotenuse. Classified by the species of wood as well as by the nominal size of a member.

They vary in size depending on their length and spacing. In a rafter. Is prescribed as are the connections of these members. Collar ties rafter ties structural ridge beams.

Not shown are the hip and valley rafters needed to tie the roof together where the rafters are framed at an angle to each other. Sep 2 2019 typical roof framing members rafter ridgeboard. Most wood used in light frame residential construction takes the form of. The run or half the building span is the base of the triangle.

Ridge beams are long rectangular rigid pieces of wood metal or stone which are placed horizontally along the ridge of the roof. Understanding residential timber as1684 framed construction timber framing using as 1684 2 span tables. Rafters are sloped beams that run from the roof s ridge to the eaves. The diagram above depicts the cross section of a typical prescriptive roof consisting of the rafters a ridge board ceiling joists and collar ties.

A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework. They provide the support for the external roofing material. Inspectapedia tolerates no conflicts of interest. Bending for a roof floor or wall surface.

Rafters are inclined members spaced from 16 to 48 inches apart. The irc and ibc provide prescriptive framed shear wall designs that may be incorporated into the building design to resist lateral loads. Typical nds classifications follow. The members making up the main body of the framework of all roofs are called rafters.

It is a waterproofing layer made of regular felt stacked above the solid. Wood structure attic conversion flat roof make a donation the. The united states still uses imperial units of measurement and framing members are typically spaced sixteen or twenty four inches apart. They do for the roof what the joists do for the floor and what the studs do for the wall.

The rise or height of the roof at its peak is the altitude of the triangle. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Post a question or comment about roof framing support construction specifications practices.