Flat Roof Rafter Detail

For concentrated vertical load transfer capacity see 1d.

Flat roof rafter detail.

These days cut ups or roofs with a lot of valleys dormers and other features are increasingly popular. A flat roof has a slope of 1 8 per foot to 2 12. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs. A roof dormer may be gabled as in our sketch above or it may be a low slope or flat roof.

Notice that the hip rafter forms what. In addition to floor and roof framing details this guide includes recommendations for cantilevers. 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. It is not ideal for snow or heavy rain but modern materials and proper drainage have helped.

Other roof protrustions sothat notiiing obstructs tiieflow ofair from eave to ridge. 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. Think of a flattened hip roof.

In many cases with purchased house plans the details of the roof construction including rafter design are included. 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. 1b apa rim board one. Definition of hip rafter.

That will help you remember certain factors and details to build the best possible flat roof. Recommended construction details for performance rated i joists in floor and roof applications. Main features flat roof design detail. In our rafter type sketch above the hip rafters are drawn in blue.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. I joist construction details. First off the flat roof design detail is an extremely basic direct and utilitarian design every single current trademark. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.

The flat roof design detail can go up against different style that when nitty gritty right can ooze a cutting edge feel. Such as joist header or rafter. Another common design in the northeast is the saltbox which is a gable roof with one longer side.