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Basic carpentry skills are necessary to be able to complete home renovation, home building and other construction projects. A carpenter or home renovator needs to be able to layout a building site; determine the elevations of site excavations, and concrete footings and other components; build concrete footing and wall forms; frame and sheath floors, walls and roofs; and build stairs. This site provides that information and a way to incorporate the perfect rectangle, named the Golden Section, into building projects.