Flat Roof Framing Plan Details

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.

Flat roof framing plan details.

The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. Some basic roof styles include. Above all the major benefit is being simple in construction process. Parts of a roof a ridge board is a horizontal member of the roof frame.

Looked at from the birds eye view. Skillion shed style roof framing the skillion and shed style roofs are framed with a single slope 2 4 or 2 6 or thicker rafters spanning from the low wall to the high wall. Gable roof framing plan. From there the flat roof system you choose will determine the materials you apply.

Roof frame plan roof frame plan details the rafters and the spacing of the roof. The point at which all the rafters are. A frames are tall symmetrical frames requiring only one type of rafter to be constructed. It will be a genuine idea to consider the modern flat roof house plans for various positive reasons.

The strengths of modern flat roof house plans. The run or half the building span is the base of the triangle. Unit of run is a fixed unit of measure always 12 inches for the common rafter. And the line length measurement from the roof peak to the building wall is the hypotenuse.

If you plan to have eaves to protect the shed walls make sure you add the extra length when measuring the rafters. Refer to the figure as you study the terms discussed in the next paragraphs. When framing a flat roof you will need to create a slight incline. Some roofs actually slope in several directions ensuring optimal water runoff.

Features associated with basic roof framing terms are shown in figure 2 2. Waterproof membrane to prevent water penetrating the structure and interior of the building roof deck providing the base for the waterproof membrane and in some cases the insulation. Get along with the benefits of flat roof design. On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases.

A flat roof usually consists of the following. The rise or height of the roof at its peak is the altitude of the triangle. Span is the horizontal distance between the outside top plates or the base of two abutting right triangles. This will help you create a flat roof framing plan.

A gable is an extended section of roof that extends from one wall. Flat roofs are always built at a slight incline at least 1 8 inch per foot.