Wood Flat Roof Framing Details

Conventional light frame wood structures may be built without the need for engineering analysis of each component.

Wood flat roof framing details. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs. You can do this with a foam layer that exactly fits your roof. This is known as prescriptive framing. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape.

Some roofs actually slope in several directions ensuring optimal water runoff. The provisions for prescriptive roof construction are found in chapter 8 of the irc and in section 2308 of the ibc. Details for conventional wood frame construction the first approach to achieving a strong durable struc ture involving economical use of materials is to follow a. Slab on grade construction where stucco is applied over sheathing provide 2 layers grade d paper under lath n 2x4 stud wall 16 oc df stud grade.

A literature review was conducted and supplemented with new research on the performance of conventional roof systems and components including ceiling joist to rafter connections and roof framing to wall connections. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. Flat roofs are hard to replace. 2x ceiling joists 2x solid blocking w approved framing anchor ea.

The focus of this project was on connections used with conventional light frame wood roof construction. The run or half the building span is the base of the triangle. When framing a flat roof you will need to create a slight incline. This could mean flat roofs may not raise the same red flags they used to.

Within limitations which include among others building size roof. The rise or height of the roof at its peak is the altitude of the triangle. Of course you don t need to live in a modern house to deal with a flat roof. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.

Flat roofs are always built at a slight incline at least 1 8 inch per foot. Panel w 8d 6 6 12 oc common nails 2x roof r w r 30 batt. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. This will help you create a flat roof framing plan.

And the line length measurement from the roof peak to the building wall is the hypotenuse.