Flat Roof Rafter Detail

Notice that the hip rafter forms what amounts to a descending ridge a single line that starts at the top of the roof and descends to the wall top plate at a wall corner.

Flat roof rafter detail. Asphalt shingle can be installed on a pitch of 2 over 12 or greater. The size of rafters for a flat roof depends on the horizontal span of the building the type and grade of timber used and the load on the roof. A roof dormer may be gabled as in our sketch above or it may be a low slope or flat roof. That will help you remember certain factors and details to build the best possible flat roof.

They are nailed securely to exterior wall plates and to each other. Plywood or osb is the most common materials used for the roof sheathing. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. Main features flat roof design detail first off the flat roof design detail is an extremely basic direct and utilitarian design every single current trademark.

A rafter that runs diagonally between the roof ridge and the top of the wall plate forming a hipped roof. Definition of hip rafter. In our rafter type sketch above the hip rafters are drawn in blue. The flat roof design detail can go up against different style that when nitty gritty right can ooze a cutting edge feel.

It must meet the local codes for thickness at least 3 8 which is also based on the rafter or truss spacing.