Typical Roof Framing Members

The rise or height of the roof at its peak is the altitude of the triangle.

Typical roof framing members.

Understanding residential timber as1684 framed construction timber framing using as 1684 2 span tables. Gable a gable roof has a ridge at the center and slopes in two directions. The united states still uses imperial units of measurement and framing members are typically spaced sixteen or twenty four inches apart. All roof framing tables are organized by maximum snow load.

Most wood used in light frame residential construction takes the form of. Typical nds classifications follow. Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. And the line length measurement from the roof peak to the building wall is the hypotenuse.

A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. In a rafter. 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. Bending for a roof floor or wall surface.

Common rafter valley rafter valley jack rafter hip rafter hip jack rafter cripple jack rafter dormer rafter. An example of each is shown in figure 2 1. Is prescribed as are the connections of these members. They provide the support for the external roofing material.

The loads acting on a framing member or. Wood structure attic conversion flat roof make a donation the. Inspectapedia tolerates no conflicts of interest. Common types of roofs and basic framing terms.

Ridge beams are long rectangular rigid pieces of wood metal or stone which are placed horizontally along the ridge of the roof. Classified by the species of wood as well as by the nominal size of a member. 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. In most regions the first thing to consider before sizing the wood framing members for a roof is the maximum snow load that the roof will have to bear.

Using span tables as1684 2. It is the form most commonly used by. Collar ties rafter ties structural ridge beams. It is a waterproofing layer made of regular felt stacked above the solid.

The run or half the building span is the base of the triangle. Rafters are sloped beams that run from the roof s ridge to the eaves. Initially we will discuss the framing of gable roofs so that we can learn the basics of how to size a roof rafter beam or joist. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

The diagram above depicts the cross section of a typical prescriptive roof consisting of the rafters a ridge board ceiling joists and collar ties.