Gable roof
Videos
A gable roof is a roof consisting of two sections whose upper horizontal edges meet to form its ridge. The most common roof shape in cold or temperate climates, it is constructed of rafters, roof trus
A form of gable roof (Käsbissendach) on the tower of the church in Hopfen am See, Bavaria
Purlin
Videos
A purlin is a longitudinal, horizontal, structural member in a roof. In traditional timber framing there are three basic types of purlin: purlin plate, principal purlin, and common purlin.
Gable roof
…upper horizontal edges meet to form its ridge. The most common roof shape in cold or temperate climates, it is constructed of rafters, roof trusses or purlins. The pitch of a gable roof can vary greatly. The gable roof is so common because of the simple design of the roof timbers and the rectangular shape of…
A view of a roof using common purlin framing. The purlins are marked in red. This view is from the inside of the building, below the roof. The rafters are the beams of wood angled upward from the ground. They meet at the top of the gable at a ridge beam (also ridge purlin or roof-tree), which has extra bracing to attach it to the rafters. The purlins are the large beams perpendicular to the rafters; from this shot, it appears that there are three purlins on either side of the roof. The sheathing boards are sometimes called the
Roll-formed metal roof purlins, also called roof battens. They are cropped to the angle of the purlin top cuts and can be lapped for joining.
Metal purlins or roof battens screwed to roof gang-nail-type trusses
Hardwood purlins fixed to steel supports on a skillion roof and main roof. House under construction, tropical North Australia.