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2. Timber roof truss - Wikipedia

   en.wikipedia.org/wiki/Timber_roof_truss

   Closed/open distinction is used in two ways to describe truss roofs. Closed truss: A truss with a tie beam; or; Roof framing with a ceiling so the framing is not visible. Open truss: A truss with an interrupted tie beam or scissor truss which allow a vaulted ceiling area; or; Roof framing open to view, not hidden by a ceiling. [4]

3. American historic carpentry - Wikipedia

   en.wikipedia.org/wiki/American_historic_carpentry

   A variation of a plank framed truss with metal plate connectors on a pole barn. Plank framed truss was the name for roof trusses made with planks rather than timber roof trusses. In the 20th century, it was typical for carpenters to make their own trusses by nailing planks together with wood plates at the joints.

4. 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.

5. Truss - Wikipedia

   en.wikipedia.org/wiki/Truss

   For more truss types, see truss types used in bridges. A large timber Howe truss in a commercial building. There are two basic types of truss: The pitched truss, or common truss, is characterized by its triangular shape. It is most often used for roof construction. Some common trusses are named according to their "web configuration".

6. Rafter - Wikipedia

   en.wikipedia.org/wiki/Rafter

   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) and an unusual extra layer of common rafters on the lower half to form a gallerie. Note how the rafter poles for the gallerie tie-in. The Bequet-Ribault House was built c. 1793 near Ste. Geneviève ...

7. Covered bridge - Wikipedia

   en.wikipedia.org/wiki/Covered_bridge

   A few two-lane bridges were built, having a third, central truss. [5] Many different truss designs were used. One of the most popular designs was the Burr Truss, patented in 1817, which used an arch to bear the load, while the trusses kept the bridge rigid. Other designs included the King, Queen, Lattice, and Howe trusses.