Typical Roof Framing Members

In a rafter.

Typical roof framing members.

They provide the support for the external roofing material. Sep 2 2019 typical roof framing members rafter ridgeboard. It is a waterproofing layer made of regular felt stacked above the solid. The united states still uses imperial units of measurement and framing members are typically spaced sixteen or twenty four inches apart.

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

Classified by the species of wood as well as by the nominal size of a member. Rafters are sloped beams that run from the roof s ridge to the eaves. Inspectapedia tolerates no conflicts of interest. Understanding residential timber as1684 framed construction timber framing using as 1684 2 span tables.

Ridge beams are long rectangular rigid pieces of wood metal or stone which are placed horizontally along the ridge of the roof. And the line length measurement from the roof peak to the building wall is the hypotenuse. Most wood used in light frame residential construction takes the form of. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load.

They do for the roof what the joists do for the floor and what the studs do for the wall. The irc and ibc provide prescriptive framed shear wall designs that may be incorporated into the building design to resist lateral loads. In the uk a concrete tiled roof would normally have rafters at 600 mm 24 in centers roof battens at 300 mm 12 in centers and ceiling joists at 400 mm 16 in centers. Rafters are inclined members spaced from 16 to 48 inches apart.

The run or half the building span is the base of the triangle. Both use framing members such as dimensional lumber engineered lumber or light gauge c shaped steel members surfaced with structural sheathing typically plywood or osb. The rise or height of the roof at its peak is the altitude of the triangle. Wood structure attic conversion flat roof make a donation the.

Post a question or comment about roof framing support construction specifications practices. Common rafter valley rafter valley jack rafter hip rafter hip jack rafter cripple jack rafter dormer rafter. Typical nds classifications follow. The diagram above depicts the cross section of a typical prescriptive roof consisting of the rafters a ridge board ceiling joists and collar ties.

The members making up the main body of the framework of all roofs are called rafters. Using span tables as1684 2. Is prescribed as are the connections of these members.