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

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88 Welded Bridge Structure - A structure whose metal elements are connected by welds. Welded Joint - A joint in which the assembled elements and members are united through fusion of metal. Wheel Guard - A raised curb along the outside edge of traffic lanes to safeguard constructions outside the roadway limit from collision with vehicles. Wheel Load - The load carried by and transmitted to the supporting structure by one wheel of a traffic vehicle, a movable bridge or other motive equipment or device. Wichert Truss - The Wichert Truss, designed by E.M. Wichert of Pittsburg, PA, in 1930, is a cantilever spandrel-braced deck arch that is not a "true arch" bridge. The curved lower chord gives the bridge the form of an arch, but it does not rely on arch action to carry the load. The open diamond panel above each pier is the easily recognized mark of this truss type; without a vertical truss member in this hinged location. Wire Rope - Steel cable. Working Stress- The unit stress in a member under service or design load. X-Bracing - A form of additional supports for the piling of a bridge. The timbers are placed in a “crisscross” pattern joining the supporting piling. Yield - Permanent deformation that a metal piece takes when it is stressed beyond the elastic limit. Yield Stress - The stress at which noticeable, suddenly increased deformation occurs under slowly increasing load. References: CALTRANS | Caltech | Historic Bridges of Iowa | Indiana DOT | Texas DOT Bridge Design Manual | Washington <strong>State</strong> DOT Tacoma Narrows Bridge Glossary University of Iowa Libraries Litchtenberger Engineering Library Glossary Source: http://www.dot.state.oh.us/DIVISIONS/COMMUNICATIONS/BRIDGINGTHEGAP/Pages/BridgeTermDefini tions.aspx downloaded 4/14/2010. Used with permission.
Appendix D: SHA Bridges Included in 1948-1965 Historic <strong>Highway</strong> Bridge Study Eligibility Description Bridge No. Year Built County Material Type MD 36 over BRADDOCK RUN 0100100 1957 Allegany Steel Stringer/Multi-beam or Girder MD 36 over JENNINGS RUN 0100400 1957 Allegany Steel Stringer/Multi-beam or Girder US 40 ALT over BRADDOCK RUN 0102700 1948 Allegany Concrete Rigid Frame MD 144 over TOWN CREEK 0103400 1957 Allegany Steel Continuous Stringer/Multi-beam or Girder MD 51 over EVITTS CREEK 0104400 1957 Allegany Prestressed (Pretensioned) Concrete Box Beam or Girders - Multiple VICTORY POST DRIVE over GEORGES CREEK 0105500 1950 Allegany Steel Girder and Floorbeam System US 220 over MD 135A 0105900 1952 Allegany Steel Continuous Stringer/Multi-beam or Girder NE US 220 over N POTOMAC RIVER, MD 135 0106000 1951 Allegany Steel Continuous Stringer/Multi-beam or Girder E MD 942 over N BRANCH POTOMAC RIVER 0106600 1953 Allegany Steel Arch - Through MD 36 over NORTH BRANCH 0107800 1960 Allegany Steel Stringer/Multi-beam or Girder WINDY RIDGE DRIVE over JENNINGS RUN 0107900 1959 Allegany Steel Stringer/Multi-beam or Girder MD 952 over IS 68 0108100 1962 Allegany Steel Continuous Stringer/Multi-beam or Girder MD 135 over GEORGES CREEK 0108200 1963 Allegany Steel Stringer/Multi-beam or Girder MD 51 over CSX TRANS., WINEOW ST 0109200 1965 Allegany Steel Stringer/Multi-beam or Girder MD 2 RAMP '8' over BOULTERS WAY 0200800 1953 Anne Arundel Steel Continuous Stringer/Multi-beam or Girder US 50 RAMP '6' over BOULTERS WAY 0200900 1953 Anne Arundel Steel Continuous Stringer/Multi-beam or Girder MD 295 NBR over PATAPSCO RIVER 0201101 1949 Anne Arundel Steel Stringer/Multi-beam or Girder MD 295 SBR over PATAPSCO RIVER 0201102 1949 Anne Arundel Steel Stringer/Multi-beam or Girder NE MD 168 over MD 295 NBR 0201200 1949 Anne Arundel Steel Stringer/Multi-beam or Girder NE HAMMONDS FERRY RD over MD 295 NBR 0201300 1949 Anne Arundel Steel Stringer/Multi-beam or Girder WEST NURSERY ROAD over MD 295 NBR 0201400 1949 Anne Arundel Steel Stringer/Multi-beam or Girder
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"TOIORROW'S ROADS TODAY" EXPRESSWAY
Page 3 and 4:
3 SHA identified 286 highway bridge
Page 5 and 6:
5 Table of Figures Figure 1: US 40
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7 Until 1941, Maryland did not have
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9 plate metal girder bridges. The n
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11 Epigraph “Tomorrow’s Roads T
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13 after 1965. Those developments h
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15 Figure 1: US 40 over the Patapsc
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17 State Struggles The SRC also pro
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19 As the SRC finalized the bridges
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21 This central shore location was
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23 William Preston Lane, Jr. and th
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25 The BPR and National Park Servic
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27 project. The highway bonds sold
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29 highways that connected county s
Page 31 and 32:
31 Figure 10: I-695 at Dulaney Vall
Page 33 and 34:
33 Figure 12: Atomic Energy Commiss
Page 35 and 36:
35 Federal Aid Highway Act of 1956
Page 37 and 38: 37 Maryland continued to apply for
Page 39 and 40: 39 SRC expanded the road to a four-
Page 41 and 42: 41 completion of the two interchang
Page 43 and 44: 43 Figure 17: Governor Elbert N. Ca
Page 45 and 46: 45 Each of these bridges provides u
Page 47 and 48: 47 Bibliography American Associatio
Page 49 and 50: 49 Maryland-National Capital Park a
Page 51 and 52: 51 ____________, Report of the Stat
Page 53 and 54: 53 Appendix A: Results of Field Inv
Page 55 and 56: 55 Steel Deck Truss - similar to St
Page 57 and 58: 57 Concrete Encased Steel Beam, SHA
Page 59 and 60: 59 or Bethlehem Steel types would b
Page 61 and 62: 61 Eligible Bridges The following b
Page 63 and 64: 63 to carry boats. Sometimes carrie
Page 65 and 66: 65 Bridge Condition Ratings - Throu
Page 67 and 68: 67 to the arch below. The first arc
Page 69 and 70: 69 Deck Bridge - A bridge in which
Page 71 and 72: 71 Embankment - Angled grading of t
Page 73 and 74: 73 Girder - A horizontal structure
Page 75 and 76: 75 Headwall - The device placed at
Page 77 and 78: 77 Lag - Crosspieces used to connec
Page 79 and 80: 79 Parapet - A low wall along the o
Page 81 and 82: 81 of multiple members of a truss.
Page 83 and 84: 83 Spandrel - The roughly triangula
Page 85 and 86: 85 Swing Bridge - A movable deck br
Page 87: 87 Unit Stress - The stress per uni
Page 91 and 92: 91 Eligibility Description Bridge N
Page 101 and 102: 101 Eligibility Description Bridge
Page 103: Appendix E: Resume Anne E. Bruder i
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