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2. I-joist - Wikipedia

   en.wikipedia.org/wiki/I-joist

   Invented in 1969, the I-joist is an engineered wood product that has great strength in relation to its size and weight. The biggest notable difference from dimensional lumber is that the I-joist carries heavy loads with less lumber than a dimensional solid wood joist. [1] As of 2005, approximately 50% of all wood light framed floors used I-joists.

3. Framing (construction) - Wikipedia

   en.wikipedia.org/wiki/Framing_(construction)

   Engineered components are commonly used to form floor, ceiling and roof structures in place of solid wood. I-joists (closed-web trusses) are often made from laminated woods, most often chipped poplar wood, in panels as thin as 1 cm (0.39 in), glued between horizontally laminated members of less than 4 cm by 4 cm (two-by-twos), to span distances ...

4. 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.

5. Timber framing - Wikipedia

   en.wikipedia.org/wiki/Timber_framing

   Timber-framed structures differ from conventional wood-framed buildings in several ways. Timber framing uses fewer, larger wooden members, commonly timbers in the range of 15 to 30 cm (6 to 12 in), while common wood framing uses many more timbers with dimensions usually in the 5- to 25-cm (2- to 10-in) range.

6. Lookout (architecture) - Wikipedia

   en.wikipedia.org/wiki/Lookout_(architecture)

   A lookout, [1] lookout rafter or roof outlooker [2] is a wooden joist that extends in cantilever out from the exterior wall (or wall plate) of a building, supporting the roof sheathing and providing a nailing surface for the fascia boards. When not exposed it serves to fasten the finish materials of the eaves.

7. Parallel-strand lumber - Wikipedia

   en.wikipedia.org/wiki/Parallel-strand_lumber

   [citation needed] PSL can be made from any wood species, but Douglas fir, southern pine, western hemlock, and yellow poplar are commonly chosen [9] because of their superior strength. The product is manufactured as a 12-by-12-inch (300 mm × 300 mm) or 12-by-18-inch (300 mm × 460 mm) billet in a rectangular cross-section, which is then ...

8. File:The Southern Pine Lumber Company sawmills near Diboll ...

   en.wikipedia.org/wiki/File:The_Southern_Pine...

   English: Photograph of nine cars of hardwood timber on a switch near the Southern Pine Lumber Company sawmills, which are shown in the background. Published in the "American Lumberman" in 1907.This photograph is part of the collection entitled: American Lumberman: Photographs of Southern Pine Lumber Company and was provided by The History Center to The Portal to Texas History, a digital ...

9. American historic carpentry - Wikipedia

   en.wikipedia.org/wiki/American_historic_carpentry

   The joists are eliminated by the use of heavy planks saving time and strength of the timbers because the joists notches were eliminated. The beams are spaced 4 feet (1.2 m) to 18 feet (5.5 m) apart and the planks are 2 inches (5.1 cm) or more thick possibly with another layer of 1 inch (2.5 cm) on the top as the finished flooring could span ...