Wood Flat Roof Framing Plan

Continuing on from part 3.

Wood flat roof framing plan.

Here we have a wood framed gable roof. Framing a roof is the last step in framing new construction. Chapter 5 design of light wood framing inches by 9 25 inches and a 1x4 is 3 4 inch by 3 5 inches. It is not ideal for snow or heavy rain but modern materials and proper drainage have helped.

Of course you don t need to live in a modern house to deal with a flat roof. If you build a flat roof try to have it slope in multiple directions to drains or gutters. Wood lumber standard ps 20 provide for framing lumber surfaced to standard sizes at the unseasoned condition s grn at 19 percent maximum moisture content s dry. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.

Let s consider a basic gable wood roof framing design. This will help you create a flat roof framing plan. Flat roofs are always built at a slight incline at least 1 8 inch per foot. In the case of truss framing you will use pre made triangular shaped wood pieces to build the roof frame.

While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below. The point at which all the rafters are attached to. Thus at the very outset you must make a decision of whether you want to go with the traditional more labor intensive stick framing process or whether you d prefer to use the newer less labor intensive truss framing process. Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

A flat roof has a slope of 1 8 per foot to 2 12. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. Transfers the load of the roof through the raftersto walls below. When framing a flat roof you will need to create a slight incline.

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. Think of a flattened hip roof. Some roofs actually slope in several directions ensuring optimal water runoff.