Title: A Rudimentary Treatise on the Principles of Construction in the Carpentry and Joinery of Roofs
Description: Book digitized by Google and uploaded to the Internet Archive by user tpb.
Subjects: strain, roof, rafters, beam, construction, weight, roofs, strength, rafter, horizontal, relative strength, public domain, middle point, sir christopher, horizontal thrust, principal rafters, fixed points, absolute strength, square inch, google book, Joinery, Carpentry