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Engineered lumber can be cut to length and installed much like sawn lumber; the flitch requires shop fabrication and/or field bolting. This, coupled with a much increased self-weight of the beam (11.4 pounds (5.2 kg) for engineered wood vs. 25.2 pounds (11.4 kg) for a flitch beam), decreases the viability of the system.
The longest plank in the world (2002) is in Poland (near Szymbark) and measures 36.83 metres (about 120 ft 10 in) long. Individual pieces of lumber exhibit a wide range in quality and appearance with respect to knots, slope of grain, shakes and other natural characteristics. Therefore, they vary considerably in strength, utility, and value.
In engineering, span is the distance between two adjacent structural supports (e.g., two piers) of a structural member (e.g., a beam). Span is measured in the horizontal direction either between the faces of the supports (clear span) or between the centers of the bearing surfaces (effective span): [1] A span can be closed by a solid beam or by ...
In modern wood construction, sills usually come in sizes of 2×4, 2×6, 2×8, and 2×10. In stick framing, the sill is made of treated lumber, and is anchored to the foundation wall, often with J-bolts, to keep the building from coming off the foundation during a severe storm or earthquake. Building codes require that the bottom of the sill ...
The following is a list of spans, either used for overhead line crossings of rivers, sea straits or valleys, as antenna or for aerial tramways. This list is incomplete ; you can help by adding missing items .
Only with the discovery of electricity and radio communication did people have a reason for tying a wire between two poles, thus creating the simplest form of long spans. The span of the Pantheon, Rome, is not 43.3 m because there is a hole at the top of 9.1 m, so the span has been reduced with the size of the hole to 34.2 m. The span of any ...