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2. 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.

3. Hammerbeam roof - Wikipedia

   en.wikipedia.org/wiki/Hammerbeam_roof

   A hammer-beam is a form of timber roof truss, allowing a hammerbeam roof to span greater than the length of any individual piece of timber.In place of a normal tie beam spanning the entire width of the roof, short beams – the hammer beams – are supported by curved braces from the wall, and hammer posts or arch-braces are built on top to support the rafters and typically a collar beam.

4. Purlin - Wikipedia

   en.wikipedia.org/wiki/Purlin

   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 that there are three purlins on either side of the roof.

5. 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 ...

6. File:SteelDetail(2D-Truss).pdf - Wikipedia

   en.wikipedia.org/wiki/File:SteelDetail(2D-Truss).pdf

   English: Detail of a steel truss, like it is build nowadays, it uses welds and bolds due to the fact it is at site joint, where two parts get connected at site (see Plan of the tuss). It is a part of a Plan (File:Det JoKa008-Model.pdf), which shows three details of a truss (File:Fachwerkplan.pdf)

7. File:T-S diagram.pdf - Wikipedia

   en.wikipedia.org/wiki/File:T-S_diagram.pdf

   This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.

8. Pole building framing - Wikipedia

   en.wikipedia.org/wiki/Pole_building_framing

   The roof structure is frequently a truss roof supporting purlins or laths, or built using common rafters. Wide buildings with common rafters need interior rows of posts. Sometimes rafters may be attached directly to the poles. The roof pitch of pole buildings is usually low and the roof form is usually gable or lean-to.

9. Cremona diagram - Wikipedia

   en.wikipedia.org/wiki/Cremona_diagram

   The same steps can be taken for joints D, H and E resulting in the complete Cremona diagram where the internal forces in all members are known. In a next phase the forces caused by wind must be considered. Wind will cause pressure on the upwind side of a roof (and truss) and suction on the downwind side. This will translate to asymmetrical ...