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

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56 Concrete Box Beam Bridge (SHA Bridge No. 0802200, MD 225 over Mattawoman Creek, Charles County, MD) Aluminum Box Beam Bridge (SHA Bridge No. 1304600, Old MD 32 over River Road, CSX, and south Branch of Patapsco River, near Sykesville, Carroll County, MD) Concrete Slab – a reinforced concrete bridge has a deck that is constructed as a single unit spanning the space between the supporting abutments/piers. Concrete slab bridge (SHA Bridge No. 1611200, MD 381over Norfolk Southern Railroad, Prince George’s County, MD) --the sections at the piers are haunched or deeper in order to accommodate the stress of the traffic on the deck above. Concrete Encased Steel Beam – steel beams that are used as the support for the deck are encased in concrete. Steel beams are erected, then encased on-site, and supported on abutments/piers.
57 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.
Page 1 and 2:
"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
Page 7 and 8: 7 Until 1941, Maryland did not have
Page 9 and 10: 9 plate metal girder bridges. The n
Page 11 and 12: 11 Epigraph “Tomorrow’s Roads T
Page 13 and 14: 13 after 1965. Those developments h
Page 15 and 16: 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
Page 21 and 22: 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: 55 Steel Deck Truss - similar to St
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 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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