Flat Roof Rafter Detail

I joist construction details.

Flat roof rafter detail.

A rafter that runs diagonally between the roof ridge and the top of the wall plate forming a hipped roof. Of course you don t need to live in a modern house to deal with a flat roof. Notice that the hip rafter forms what. Main features flat roof design detail.

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. Another common design in the northeast is the saltbox which is a gable roof with one longer side. Other roof protrustions sothat notiiing obstructs tiieflow ofair from eave to ridge. 1b apa rim board one.

Recommended construction details for performance rated i joists in floor and roof applications. For concentrated vertical load transfer capacity see 1d. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Such as joist header or rafter.

That will help you remember certain factors and details to build the best possible flat roof. In our rafter type sketch above the hip rafters are drawn in blue. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. These days cut ups or roofs with a lot of valleys dormers and other features are increasingly popular.

Definition of hip rafter. It is not ideal for snow or heavy rain but modern materials and proper drainage have helped. In many cases with purchased house plans the details of the roof construction including rafter design are included. Think of a flattened hip roof.

Cold roof insulation between rafters wnapor barrier on warm side below orw sheatiiing roofing roofing 2 x 8 sleepers notched for vent aligned wi rafters flashing over rooang fascia sheatiiing 2 x 4 sleepers aligned w rafters provide. A roof dormer may be gabled as in our sketch above or it may be a low slope or flat roof. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses.

If you build a flat roof try to have it slope in multiple directions to drains or gutters. A flat roof has a slope of 1 8 per foot to 2 12. In addition to floor and roof framing details this guide includes recommendations for cantilevers.