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2. Roof pitch - Wikipedia

   en.wikipedia.org/wiki/Roof_pitch

   A flat roof includes pitches as low as 1 ⁄ 2:12 to 2:12 (1 in 24 to 1 in 6), which are barely capable of properly shedding water. Such low-slope roofs (up to 4:12 (1 in 3)) require special materials and techniques to avoid leaks. [4] Conventional describes pitches from 4:12 (1 in 3) to 9:12 (3 in 4). [4]

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.

4. List of roof shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_roof_shapes

   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; Bochka roof; Conical roof or cone roof; Hyperbolic Saddle

5. Nearly automatic truss factory keeps Alpha Building Center ...

   www.aol.com/nearly-automatic-truss-factory-keeps...

   Nov. 4—SHIPSHEWANA — In an effort to keep up with the needs of area construction companies, Alpha Building Center in Shipshewana has constructed a new near-fully automated truss facility.

6. Truss - Wikipedia

   en.wikipedia.org/wiki/Truss

   This type of truss is seen in a framed roof consisting of rafters and a ceiling joist, [14] and in other mechanical structures such as bicycles and aircraft. Because of the stability of this shape and the methods of analysis used to calculate the forces within it, a truss composed entirely of triangles is known as a simple truss. [ 15 ]

7. Open web steel joist - Wikipedia

   en.wikipedia.org/wiki/Open_web_steel_joist

   The main function of an OWSJ is to provide direct support for roof or floor deck and to transfer the load imposed on the deck to the structural frame i.e. beam and column. In order to accurately design an OWSJ, engineers consider the joist span between bearing points, joist spacing, slope, live loads , dead loads , collateral loads, seismic ...