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Gothic-arch design guide. The Gothic arch originated in Michigan in the late 19th-century; [3] the first occurrence may have been in Isabella County in 1885. [4] Arches were cut from boards nailed together. These early arches were not sufficiently sturdy, but did allow for structures free of heavy timbers.
A hammer-beam is a form of timber roof truss, allowing a hammerbeam roof to span greater than the length of any individual piece of timber.In place of a normal tie beam spanning the entire width of the roof, short beams – the hammer beams – are supported by curved braces from the wall, and hammer posts or arch-braces are built on top to support the rafters and typically a collar beam.
Barrel, barrel-arched (cradle, wagon): A round roof like a barrel (tunnel) vault. Catenary: An arched roof in the form of a catenary curve. Arched roof, bow roof, [11] Gothic, Gothic arch, and ship's bottom roof. Historically also called a compass roof. [12] [13] Circular Bell roof (bell-shaped, ogee, Philibert de l'Orme roof): A bell-shaped roof.
A single arch-braced truss. Key: 1: principal rafters, 2: collar beam, 3: arch braces. Lacking a tie beam, [11] the arch-braced (arched brace) [12] truss gives a more open look to the interior of the roof. The principal rafters are linked by a collar beam supported by a pair of arch braces, which stiffen the structure and help to transmit the ...
The first rafter is fitted between the wall and the temporary central support and then further rafters are added, each resting on the last. The final rafter fits on top of the previous rafter and under the very first one. The rafters are then tied before the temporary support is removed.
Jack rafter, cripple rafter, cripple-jack rafter: A shortened rafter such as landing on a hip rafter or interrupted by a dormer. Arched rafter: Of segmental form in an arched roof. Knee (crook, kneeling, cranked) rafter: A rafter with a bend typically a few feet from the foot used to gain attic space like adding a kneewall. Rare in America.
INTERIOR VIEW SOUTH TOWARD MOVEABLE FIELD LEVEL SEATS. - Houston Astrodome, 8400 Kirby Drive, Houston, Harris County, TX HAER TX-108-9. The Lamella roof (also sometimes called the "Zollinger roof" for its inventor Friedrich Zollinger, a municipal building surveyor from Merseburg in the German state of Saxony-Anhalt [1]) is a construction type where the roof is supported by an arched network of ...
A more recent design is the installation of a roof deck with foil-backed foam along with a second deck that is air-gapped away from the foil-backed foam to allow air to flow vertically to a ventilation outlet at the peak of the roof—it is a double-deck design with an air gap. This design improves efficiency. [13]