Wood Flat Roof Framing Details

Flat roofs are always built at a slight incline at least 1 8 inch per foot.

Wood flat roof framing details.

The first flat roofs in central europe wood cement roofs and early reinforced concrete. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. You can do this with a foam layer that exactly fits your roof. Few if any materials can compete with wood framing in the construction of houses.

The modern conventional wood frame house with wood or wood product covering materials is economical long lasting and can be constructed in any location. This is known as prescriptive framing. And the line length measurement from the roof peak to the building wall is the hypotenuse. 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.

The evolution of the flat roof roofs of earth and loam archetypal forms renaissance and baroque. Gable a gable roof has a ridge at the center and slopes in two directions. The first approach to achieving a strong durable struc ture involving economical use of materials is to follow a basic modular plan for layout and attachment of framing members. 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. Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters. Wood construction data 1. Common types of roofs and basic framing terms.

Conventional light frame wood structures may be built without the need for engineering analysis of each component. It is the form most commonly used by. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. When framing a flat roof you will need to create a slight incline.

Within limitations which include among others building size roof pitch and design loads the allowed span for conventional rafters can. The rise or height of the roof at its peak is the altitude of the triangle. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. From there the flat roof system you choose will determine the materials you apply.

The run or half the building span is the base of the triangle. Some roofs actually slope in several directions ensuring optimal water runoff. 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. An example of each is shown in figure 2 1.