Roofing Framing Details

Partially these will depend on the style of roof you ve selected but you ll also have some wiggle room depending on the design elements of the house.

Roofing framing details.

The framing style of the roof refers to the actual components of each roofing truss and the design of the structural foundation of that roof. Roof framing can be simple or complex depending on the roof. The function of each component is. The rise or height of the roof at its peak is the altitude of the triangle.

Needed to tie the roof together where the rafters are framed at an angle to each other. Nearly all roofs are framed using one of two methods. The roof sheathing consisted of inch thick wide pine boards nailed to the purlins and thick enough to resist much sagging. Rafters act more like the top chord of a roof truss than as a roof joist.

Standard stick framing or the newer truss framing. The run or half the building span is the base of the triangle. Include roof pitch roof geometry slope length and climatic factors such as heavy snowfall or rainfall. And the line length measurement from the roof peak to the building wall is the hypotenuse.

The original roof was built using purlins beams extending between gable ends. The rafters carry the applied loads to the exterior walls. Whenever possible begin trim installation at the downwind end of the roof farthest away from the source of prevailing winds to al low flashing laps to face away from wind driven rain. Refer to the details.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Below is a sketch of the original roof wall structural details for this building.