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In rock climbing, an overhang is a type of route that leans back at an angle of over 90 degrees for part or all of the climb, and at its most severe can be a horizontal roof. Overhang (and roof) climbs have existed throughout climbing, originally in aid climbing where mechanical devices were used to first scale them.
Roof pitch is the steepness of a roof expressed as a ratio of inch(es) rise per horizontal foot (or their metric equivalent), or as the angle in degrees its surface deviates from the horizontal. A flat roof has a pitch of zero in either instance; all other roofs are pitched .
Gambrel roof A cross-sectional diagram of a mansard roof, which is a hipped gambrel roof. A gambrel or gambrel roof is a usually symmetrical two-sided roof with two slopes on each side. The upper slope is positioned at a shallow angle, while the lower slope is steep.
A piece added at the foot to create an overhang or change the roof pitch is called a sprocket, or coyau in French. The projecting piece on the gable of a building forming an overhang is called a lookout. A rafter can be reinforced with a strut, principal purlin, collar beam, or, rarely, an auxiliary rafter (see below). Rafter types include:
Bonnet roof: A reversed gambrel or Mansard roof with the lower portion at a lower pitch than the upper portion. Monitor roof: A roof with a monitor; 'a raised structure running part or all of the way along the ridge of a double-pitched roof, with its own roof running parallel with the main roof.' Butterfly roof (V-roof, [8] London roof [9]): A ...
Overhangs on two sides of Pennsylvania Dutch barns protect doors, windows, and other lower-level structures. Overhangs on all four sides of barns and larger, older farmhouses are common in Swiss architecture. An overhanging eave is the edge of a roof, protruding outwards from the side of the building, generally to provide weather protection.
The gable end roof is a poor design for hurricane or tornado-prone regions. Winds blowing against the gable end can exert tremendous pressure, both on the gable and on the roof edges where they overhang it, causing the roof to peel off and the gable to cave in. [4] [5]
Market overhang, a concept in marketing; Monetary overhang, a phenomenon where people have money holdings due to the lack of ability to spend them; Overhang seat, a constituency seat in excess of a party's entitlement; Overhang (architecture), a protruding structure that may provide protection for lower levels, such as overhanging eaves