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A portal frame steel building under construction. Portal frame is a construction technique where vertical supports are connected to horizontal beams or trusses via fixed joints with designed-in moment-resisting capacity. [1] The result is wide spans and open floors. Portal frame structures can be constructed using a variety of materials and ...
A bent in American English is a transverse rigid frame (or similar structures such as three-hinged arches).Historically, bents were a common way of making a timber frame; they are still often used for such, and are also seen in small steel-frame buildings, where the term portal frame is more commonly used.
A portal is an opening in a wall of a building, gate or fortification, especially a grand entrance to an important structure. [ 1 ] [ page needed ] Doors, metal gates , or portcullis in the opening can be used to control entry or exit.
Building length: 3 m (10' +/-) to 10 m (32' +/-) is common. Length is primarily limited by the ability of the load path to transfer loads to a vertical brace system (e.g. gable endwall). Building length can be extended with added discrete brace systems (e.g. roof level horizontal brace, portal frame, diagonal brace, interior partition shear wall).
The Boat Shed (Number 78) at Sheerness Naval Dockyards, built 1856–60, is constructed entirely of a cast and wrought iron members, braced as portal frames, with extensive window and timber infill panels forming the external walls. Though not entirely of cast iron, it is the earliest large metal framed building still standing, and a pioneer in ...
Channel or C section girts bolted to plate cleats welded to a portal column in an industrial building. In architecture or structural engineering, a girt, also known as a sheeting rail, is a horizontal structural member in a framed wall. Girts provide lateral support to the wall panel, primarily to resist wind loads. [citation needed]
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This building used the steel-frame method, innovated in Chicago. It was originally built with 10 stories, an enormous height in the 1800s, to a height of 138 feet (42 m). It was later expanded to 12 stories with a height of 180 feet (55 m). The building was demolished in 1931.