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The Southern Pacific Railroad bridge in Tempe, Arizona is a 393 meter (1,291 foot) long truss bridge built in 1912. [ 22 ] [ 23 ] The structure is composed of nine Pratt truss spans of varying lengths.
The Romans substituted bronze for wood in the roof truss(s) of the Pantheon's portico which was commissioned between 27 BC and 14 AD. The bronze trusses were unique but in 1625 Pope Urban VIII had the trusses replaced with wood and melted the bronze down for other uses. The Romans also made bronze roof tiles.
A grid of lightweight bridging trusses and main trusses supported the floors. The trusses had a span of 60 feet (18 m) in the long-span areas and 35 feet (11 m) in the short span area. [113] The trusses connected to the perimeter at alternate columns, and were on 6-foot-8-inch (2.03 m) centers.
Most buildings in classical Greece were covered by traditional prop-and-lintel constructions, which often required interior colonnades for support. In Sicily , truss roofs are believed to have appeared as early as 550 BC. [ 1 ]
Pyramids were the most common major structures built by ancient civilizations because it is a ... Wilhelm Ritter formulated the truss theory for the shear design of ...
500s – Hagia Sophia built in its present form. Oldest known surviving roof truss in Saint Catherine's Monastery. 495–504 – Basilica of Sant'Apollinare Nuovo, Ravenna. [3] 470 – Basilica of St. Martin, Tours. [3] 432–40 – Santa Maria Maggiore [3] and Santa Sabina in Rome. [3]
Two king post trusses linked to support a roof. Key:1: ridge beam, 2: purlins, 3: common rafters. This is an example of a "double roof" with principal rafters and common rafters. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof.
The trusses connected to the perimeter at alternate columns and were on 6 foot 8 inch (2.03 m) centers. The top chords of the trusses were bolted to seats welded to the spandrels on the exterior side and a channel welded to the core columns on the interior side.