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2. Reciprocal frame - Wikipedia

   en.wikipedia.org/wiki/Reciprocal_frame

   The first rafter is fitted between the wall and the temporary central support and then further rafters are added, each resting on the last. The final rafter fits on top of the previous rafter and under the very first one. The rafters are then tied before the temporary support is removed.

3. Birdsmouth joint - Wikipedia

   en.wikipedia.org/wiki/Birdsmouth_joint

   A birds-mouth joint in a rafter, set upon a double top plate. Shown are the two cuts of the joint: the seat cut and the heel cut. 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]

4. Rafter - Wikipedia

   en.wikipedia.org/wiki/Rafter

   Compass rafter: A rafter curved or bowed on the top (the top surface of a rafter is called its "back") or both the top and bottom surfaces. Curb rafter: The upper rafters in a curb (kerb, gambrel, Mansard roof) roof. Hip rafter (angle rafter): The rafter in the corners of a hip roof. The foot of a hip rafter lands on a dragon beam.

5. List of roof shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_roof_shapes

   Catenary: An arched roof in the form of a catenary curve. Arched roof, bow roof, [11] Gothic, Gothic arch, and ship's bottom roof. Historically also called a compass roof. [12] [13] Circular Bell roof (bell-shaped, ogee, Philibert de l'Orme roof): A bell-shaped roof. Compare with bell-cast eaves. Domed; Onion dome or rather an imperial roof ...

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.

7. Timber roof truss - Wikipedia

   en.wikipedia.org/wiki/Timber_roof_truss

   Pairs of opposing rafters were thus initially tied together by a horizontal tie beam, to form coupled rafters. But such roofs were structurally weak, and lacking any longitudinal support, they were prone to racking, a collapse resulting from horizontal movement. Timber roof trusses were a later, medieval development. [2] A roof truss is cross ...

8. Truss - Wikipedia

   en.wikipedia.org/wiki/Truss

   Planar roof trusses The roof trusses of the Basilica di Santa Croce in Florence The simplest form of a truss is one single triangle. This type of truss is seen in a framed roof consisting of rafters and a ceiling joist , [ 13 ] and in other mechanical structures such as bicycles and aircraft.

9. Domestic roof construction - Wikipedia

   en.wikipedia.org/wiki/Domestic_roof_construction

   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 oriented strand board form the roof deck (also called the sheeting or ...