I've cut hundreds of irregular hip and valley roofs during my 35-year carpentry career. Although I use a framing square for drawing and layout, I rarely use the rafter table imprinted on it because it only applies to regular plans and pitches and a calculator is faster. So when veteran timber-framer Steve Chappell recently introduced the Chappell Master Framer square, I was pleased to try one out to see if its unique decimal scales and patented rafter tables might change my approach.Heirloom BuildThe Chappell square ($118 at chappellsquare.com) is made in the U.S. of 304 stainless steel, with deeply etched...

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