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

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74 Hanger - A tension member serving to suspend an attached member. Haunch - The enlarged part of a beam near its supported ends that results in increased strength; visible as the curved or angled bottom edge of a beam. Haunched Girder - Typical slab-on-beam bridges have space between the bottom of the slab and the top of the top flanges of beams. This space, referred to as the fillet or haunch, typically consists of unreinforced concrete that increases the dead load of the section but is not normally considered to add strength.
75 Headwall - The device placed at the end of a bridge that comprises a large portion of the abutment. Headwalls are used to retain the road formation soil around and above the abutments and prevent erosion at the abutment. Hinged Arch - A two-hinged arch is supported by a pinned connection at each end. A three-hinged arch also includes a third pinned connection at the crown of the arch near the middle of a span. Compare to fixed arch. Humpback - A description of the sideview of a bridge having relatively steep approach embankments leading to the bridge deck. Impost - The surface that receives the vertical weight at the bottom of an arch. Intrados - The interior arc of an arch. Jersey Barrier - A low, reinforced concrete wall wider at the base, tapering vertically to near mid-height, then continuing straight up to its top. The shape is designed to direct automotive traffic back toward its own lane of travel and prevent crossing of a median or leaving the roadway. Commonly used on new and reconstructed bridges in place of decorative balustrades, railings or parapets.
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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
Page 13 and 14:
13 after 1965. Those developments h
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15 Figure 1: US 40 over the Patapsc
Page 17 and 18:
17 State Struggles The SRC also pro
Page 19 and 20:
19 As the SRC finalized the bridges
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21 This central shore location was
Page 23 and 24: 23 William Preston Lane, Jr. and th
Page 25 and 26: 25 The BPR and National Park Servic
Page 27 and 28: 27 project. The highway bonds sold
Page 29 and 30: 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: 73 Girder - A horizontal structure
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 and 88: 87 Unit Stress - The stress per uni
Page 89 and 90: Appendix D: SHA Bridges Included in
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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TOMORROW'S ROADS TODAY - Maryland State Highway ...

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