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2. Timber roof truss - Wikipedia

   en.wikipedia.org/wiki/Timber_roof_truss

   Timber roof truss example. The top members of a truss are known generically as the top chord, bottom members as the bottom chord, and the interior members as webs.In historic carpentry the top chords are often called rafters, and the bottom chord is often referred to as a tie beam.

3. Truss - Wikipedia

   en.wikipedia.org/wiki/Truss

   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. 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. [14]

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. Howe truss - Wikipedia

   en.wikipedia.org/wiki/Howe_truss

   Howe truss bridges may be all wood, a combination of wood and iron, or all iron. [11] Whichever design is used, wooden timbers should have square ends without mortise and tenons. [12] The design of an all-metal Howe truss follows that of the wooden truss. [1]

6. Fink truss - Wikipedia

   en.wikipedia.org/wiki/Fink_truss

   Interior of a barn with a Fink truss, with the characteristic W shape. Fink design trusses are used today for pedestrian bridges and as roof trusses in building construction in an inverted (upside down) form where the lower chord is present and a central upward projecting vertical member and attached diagonals provide the bases for roofing. [9]

7. Timber framing - Wikipedia

   en.wikipedia.org/wiki/Timber_framing

   Timber design or wood design is a subcategory of structural engineering that focuses on the engineering of wood structures. Timber is classified by tree species (e.g., southern pine, douglas fir, etc.) and its strength is graded using numerous coefficients that correspond to the number of knots, the moisture content, the temperature, the grain ...