Roof framing geometry is empirical-type knowledge. This is part 1 in Apprentice Carpentry Roof Framing Geometry for the Americans and maybe the Canadians. Yes, I used a framing square to mark and layout the rafters, but if anyone had asked me to draw out the roof framing geometry of the roofs I was cutting, I would have said no I can't draw out the roof framing geometry to the roofs that I've cut. Graphical Rafter Calculator is a powerful and user-friendly rafter calculator for roofing and roof design, useful for fast calculations and design for. Here are some steps to build a barge rafter for your roof: Make a pair of 2x4s, with the pitch angle on one end and square on the other, and cut them to the same length. In a hurry Browse our pre-made printable worksheets library with a variety of. By the time I completed my 4 years of the Union Carpentry apprenticeship program I had already cut and stacked (framed) about 100+ track home roofs, but I didn't know anything about roof framing geometry. Roof Framing questions for your custom printable tests and worksheets. If we sent American apprentices to these carpentry compensation, not only would they not medal they would most likely embarrass themselves. A traditional purlin strictly by definition is a horizontal structural member in a roof. France?,Switzerland, AustriaĪnd Germany have specialized training for their apprentices for these apprentice competitions and are light years ahead of the United States of America apprentice program in roof framing construction and geometry. Below we give the locations and functions of various roof framing members, rafter types, collar ties, rafter ties, ceiling joists, and structural ridge beams. Many common, or general purpose, rafters make up each roof. The common rafters form the sloped sides of the triangle on a traditional gable roof, which has a triangular shape. These Google SketchUp roof framing models made me realize how poor the American Union Apprentice program is compared to the apprentice programs in Europe. Rafters are part of a basic wood framing system and are made of wood lumber. From past carpentry competitions in the UK. Mark the first plumb line near the end of the rafter to locate the ridge cut. Clamp stair gauges to the framing square to align rise and run measurements with the rafter’s top edge. Training the better apprentices for carpentry competitions in the UK, sent me a couple of Google SketchUp models the other day. The simplest method is to step off the layout in 1-ft. Tony McGartland, who teaches carpentry at a college in N.Ireland and who is also responsible for

Rafter framing