Cantilever Roof Overhang Design

Many building departments limit joist cantilevers to 24 maximum.

Cantilever roof overhang design.

Nov 17 2015 explore kelly tewson s board cantilevered roof on pinterest. You must use at least five framing nails to attach the rim joist to the ends of your joists. They are essential for framing and shading windows reducing splashback and getting rain to fall far enough away from the foundation. Roof overhangs might look relatively routine but there is a lot of design thinking that goes into creating the optimal dimensions for each one.

In the photo above it appears that the cantilevered outlooker method was used and that there was a failure of the outlooker connections at the gable end and the first full truss. The distance your joists can safely cantilever or overhang a drop beam is determined by the size of the joists the wood type and grade of the lumber and the spacing between joists.