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Cantilever Roof Design

How To Build Over A Roof That Is Too Old To Carry A New Load:

On a recent project, we added a large master bedroom and bath addition to a 1940's Beaverton bungalow.

As in many additions, the new roof attachment to the old roof, presented the particular problem of not making the addition look like a tack on. The solution was building an all inclusive new roof over the entire structure including the new addition. In order not to have to remove all the existing roof and framing structure, because it would not carry the new roof load on the existing roof, a cantilever truss was designed. This allowed no load to be put on the existing roof structure. The existing roof, as so many of the time period, used 2x4 members, which would never carry even the existing load under todays codes.


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