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In solid mechanics, it is common to analyze the properties of beams with constant cross section. Saint-Venant's theorem states that the simply connected cross section with maximal torsional rigidity is a circle. [1] It is named after the French mathematician Adhémar Jean Claude Barré de Saint-Venant.
A symphony bridge would have two pylons, which would be circular in hollow cross-section. The center of the bridge would be supported by a central cable (unlike the conventional two side cables of a suspension bridge) connected to the deck via hangers connected to the crossbeams. The cross-beams and hangers are triangular in form.
Historically a beam is a squared timber, but may also be made of metal, stone, or a combination of wood and metal [1] such as a flitch beam.Beams primarily carry vertical gravitational forces, but they are also used to carry horizontal loads such as those due to earthquake or wind, or in tension to resist rafter thrust or compression (collar beam).
Shen Kuo singled out, among other passages, a scene in which Yu Hao gives advice to another artisan-architect about slanting struts in order to brace a pagoda against the wind, and a passage in which Yu Hao describes the three sections of a building, the area above the crossbeams, the area above ground, and the foundation, and then proceeds to ...
One page that is dedicated to celebrating photography from history is Old-Time Photos on Facebook. This account shares digitized versions of photos from the late 1800s all the way up to the 1980s.
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Cross bracing between joists or rafters strengthens the members by preventing sideways deflection. This bracing is known by many names such as herringbone strutting, blocking, bridging, and dwanging. This bracing is known by many names such as herringbone strutting, blocking, bridging, and dwanging.