House Long Span Roof Design

Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

House long span roof design. Long span roofs can create flexible column free internal spaces and can reduce substructure costs and construction times. Intricate roofs have many parts that incorporate several of the basic roof designs such as a gable roof sitting atop a gambrel or variations of the gable valley roof design using one or a variety of different types of roof trusses also see our very detailed diagrams showing the different parts of a roof truss. Here we have a wood framed gable 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.

Let s consider pricing for a simple structure a 26 x40 gable style house. 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. Another is to create a custom gravel stop drip edge flashing piece that changes profile along the length of the roof to compensate for the change in pitch. 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. Let s consider a basic gable wood roof framing design. 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.