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historic context of maryland highway bridges built between 1948 ...

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Maryland Bridges by Type and Year (<strong>1948</strong>-1960)Appendix BMaryland Bridges By Type And YearTYPE/YEAR <strong>1948</strong> 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 TOTALTimber beam (includesStringer/Multibeam or Girder) 1 4 8 5 2 1 1 1 1 3 27Timber Slab 1 1 1 3Stone Arch 2 2 4Metal Thru Truss 1 1Metal Deck Truss 1 1 2Movable Swing 1 1Movable Single Leaf Bascule 0Movable Double Leaf Bascule 1 1 1 3Metal Rolled Girder (Girder andFloorbeam System) 1 1 1 1 4Metal Rolled Girder ConcreteEncased (includes Stringer/Multibeam or Girder) 5 18 54 10 15 20 28 56 12 96 49 47 34 444Metal Plate Girder 1 1 3 1 2 1 1 1 11Metal Plate Girder Concrete Encased 1 1Metal Thru Arch 1 1 2Metal Deck Arch 1 1Concrete Arch 2 2Concrete Slab 6 1 3 1 2 1 2 1 6 5 28Concrete Beam (includes Tee Beam) 2 3 1 1 3 1 1 1 1 14Concrete Rigid Frame 1 2 1 1 2 2 1 5 3 2 20Concrete Box Beam or Girder 1 1 2 5 3 6 18TOTAL 9 27 80 20 23 28 34 68 15 104 62 62 54 586\15-SEP-11\\ B-1

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