Gambrel Roof Structural Analysis

Theoretical calculation 24 b.

Gambrel roof structural analysis.

A gambrel roof is a two sided symmetrical roof that has two slopes on each side. Its double or sometimes triple slopes on each side of a peak provide more space inside the roof which is attractive to homeowners too. A gable roof has only two rafter or truss chord angles a top cut at the peak and a bottom cut at the walls. A gambrel style is often called a barn roof.

Besides its unique appearance a gambrel roof also serves to maximize the usable floor space in the attic area. We had an open gambrel roof in a shed we built with a loft at our old house and it was the gussets that were more important because they hold the angle of the gambrel. Wind pressuredistribution 23 a. We had to size the plate and put in the right number of fasteners as well as size the rafters.

A gambrel roof is a popular roof style on many contemporary barns and sheds. Advantages ofthe three rafter gambrel e3 3. A gambrel roof is a symmetrical two sided roof in which each side has two slopes one steeper and one shallower. In this video i will find the compression tension and magnitude of each member and the f.

A contractor will take it to an engineer anyway. Wind pressuredistribution diagram 25 4. Think of a typical barn roof the most common gambrel roof most people see. Comparative costs 23 d.

To calculate a gambrel roof. Dutch roof was the popular term for a gambrel roof in the eighteenth century in england and north america. Area under roof si b material inframing el c. A traditionally framed gambrel top left requires a complicated structural analysis and extensive labor intensive reinforcing with metal hardware at each connection in order to direct uplift forces through the complex multiple load paths that exist in the frame all of which add considerable time and expense.

Dead loadson bamroof 28 b analysis ofthe. The lower slope is steeper and the upper slope is positioned at a shallow angle. If you plan on building and installing your own gambrel roof you ll have to draw out plans first to determine the proper dimensions.