House Long Span Roof Design

Let s consider a basic gable wood roof framing design.

House long span roof design.

Here we have a wood framed gable roof. Also different architectural styles will use the same type of roof. One way is to design the roof to have a parapet wall covering the roof edge. The intent is to create a uniform edge on the outside but a varying profile on the inside along the sloping roof.

Near the top is a very steep pitch and near the upper walls of the home are a lower pitch though still fairly steep. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. Long span roofs can create flexible column free internal spaces and can reduce substructure costs and construction times. This house will have a gable roof and a 16 center area with a cathedral ceiling over the living and dining room areas the roof pitch will be 5 12 with a cathedral ceiling at a 2 5 12 slope the overhang will be 2 around the whole house.

Long span roofs are generally defined as those that exceed 12 m in span. Continuing on from part 3. It may consist of a flat roof on top but the main design element is the multi pitch sloped in what is essentially a hip roof on top of another hip frame. Floor beam span tables of residential structural design we will now look at roof rafter and beam design.