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2. Rafter - Wikipedia

   en.wikipedia.org/wiki/Rafter

   Common rafters without collar beams form most of this roof. There is not always a ridge board or beam where the rafter tops meet. Under the midsections of the rafters are purlins which support the common rafters and are supported by principal rafters. This roof ends in an octagonal hip. A double roof (using a Norman truss), common rafters supported by principal rafters (top chords in this case ...

3. Timber roof truss - Wikipedia

   en.wikipedia.org/wiki/Timber_roof_truss

   Two king post trusses linked to support a roof. Key: 1: ridge beam, 2: purlins, 3: common rafters. This is an example of a "double roof" with principal rafters and common rafters. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof. Trusses usually occur at regular intervals, linked by longitudinal timbers such as ...

4. Domestic roof construction - Wikipedia

   en.wikipedia.org/wiki/Domestic_roof_construction

   A simple rafter roof consists of rafters that the rafter foot rest on horizontal wall plates on top of each wall. [3] The top ends of the rafters often meet at a ridge beam, but may butt directly to another rafter to form a pair of rafters called a couple. Depending on the roof covering material, either horizontal laths, battens, or purlins are fixed to the rafters; or boards, plywood, or ...

5. Birdsmouth joint - Wikipedia

   en.wikipedia.org/wiki/Birdsmouth_joint

   In light frame construction, a birdsmouth joint or bird's beak cut is a woodworking joint that is generally used to connect a roof rafter to the top plate of a supporting wall. [1] It is an indentation cut into the rafter which consists of a "seat cut" (the face of which rests on the top plate) and a "heel cut" or "plumb cut" (the face of which ...

6. Purlin - Wikipedia

   en.wikipedia.org/wiki/Purlin

   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, 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 ...

7. Gable roof - Wikipedia

   en.wikipedia.org/wiki/Gable_roof

   Gable roof. A gable roof[1] 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 trusses or purlins. The pitch of a gable roof can vary greatly.