Translations:AY Honors/Carpentry/Answer Key/111/en
From Pathfinder Wiki
A conventional roof is made from rafters which are beams that run from the roof's ridge to the ceiling joists. A truss is an engineered, pre-built structure consisting of triangles. Trusses are lighter, stronger, and cheaper than rafters, but they form a web of lumber inside the roof rendering the attic space unusable. Rafters are positioned in line with the studs in a wall and are fastened to both the top plate and the ceiling joists. A pair of rafters (joined to the opposite sides of the ridge board) are sometimes tied together with a collar beam which is a horizontal member.
