TOMORROW'S ROADS TODAY - Maryland State Highway ...
TOMORROW'S ROADS TODAY - Maryland State Highway ...
TOMORROW'S ROADS TODAY - Maryland State Highway ...
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55<br />
Steel Deck Truss - similar to Steel Deck Arch except traffic loads are transmitted from trusses<br />
directly to abutments/piers via bearings, in lieu of arch foundations<br />
Steel Deck Truss (SHA Bridge No. 0604900, MD 26 over Liberty Reservoir, Carroll County,<br />
MD)<br />
Multiple Rolled Beams or Multiple Fabricated Girders (also Stringer Multi-Beam/Girder,<br />
formerly called Metal Girder Bridge) – rolled beams or fabricated girders that support the deck<br />
of the bridge, all supported by the abutments and piers. A rolled I or T Beam is formed as one<br />
piece that is extruded from its form, while a fabricated girder consists of flat metal sheets that are<br />
welded or riveted together to form a longer/wider/deeper beam.<br />
Multiple Fabricated Girders/Stringer Multi-Beam/Girder (SHA Bridge No. 0210100, MD 2 over<br />
US 50, Annapolis, MD). This is an example of multiple girders welded together.<br />
Metal or Concrete Box Beams -- trapezoidal or rectangular sections that support the deck of the<br />
bridge and provide greater stability. The concrete box beam bridges could be constructed in<br />
areas where there was no traffic passing through the construction site, generally over water<br />
where flooding could be an issue. Metal box beam bridges are generally reserved for highway<br />
flyover ramps.