TOMORROW'S ROADS TODAY - Maryland State Highway ...

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Concrete Encased Steel Beam, SHA Bridge No. 0205000, MD 176 over Piney Run, Anne
Arundel County, MD
Floorbeam/Girder System -- The concrete deck is supported by a steel flooring system consisting
of longitudinal stringers (rolled beams), transverse floorbeams (rolled beams or fabricated
girders) and two main fabricated girders supported on abutments/piers.
Movable – Bascule – a type of movable bridge where one or two leaves of the bridge deck are
raised to allow passage of a boat through the bridge -- generally used on rivers where there is an
active water passage. SHA Bridge No. 0336500 (MD 157 over Bear Creek, Baltimore County),
No. 1700600 (MD 18B over Kent Island Narrows, Queen Anne’s County) and No. 2202800 (US
50 Business over North Branch of Wicomico River, Salisbury, Wicomico County) are all
examples of bascule span bridges built between 1948 and 1965.
Movable – Swing – a type of movable bridge where the span that crosses the water channel will
swing around to allow passage of a boat through the bridge. SHA Bridge No. 0400800, MD 231
over the Patuxent River, St. Benedict, Charles and Calvert Counties is an example of a swing
span bridge built in 1950/1951.
Concrete Rigid Frame – a monolithic bridge in which the superstructure and the substructure are
of one continuous fabric, generally built of reinforced concrete or fabricated structural steel.
Concrete Rigid Frame (SHA Bridge No. 1010800, US 15 over Midland Railroad, Frederick
County, MD)
Concrete Tee Beam - monolithic concrete deck and concrete girders acting compositely and
supported on abutments/piers.