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expensive, high-strength concrete and steel to support the bridge. Because of the high cost of materials and construction of such a span, the design of the arch was revised to a 6.6:1 span-to-rise ratio, making the main arch taller and decreasing its length from 480 ft (150 m) to 400 ft (120 m). This design change was expected to allow for cheaper materials and save over 60,000 pounds (27,000 kg) of steel while keeping the ten-degree incline that makes the bridge unique.
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The bridge surface is composed of two separate decks, a 35 ft (11 m) wide vehicular deck carrying two lanes of eastbound traffic, one lane of westbound traffic, and a 18 ft (5.5 m) wide pedestrian deck on the opposite side of the arch from the vehicular deck and slightly elevated.
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When the former bridge closed, engineers estimated that a replacement would cost approximately $ 19.5 million. However, by 2004, estimates climbed $ 29.5 million. When planners received construction bids in 2006, the lowest was $ 44.1 million. Cost overruns, design changes and inspections added
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The final redesign of the Main street bridge was of the piers. The original design called for two 'V-piers', formed by the convergence of the main arch and the secondary arches on either side. This design proved to be nearly impossible to make structurally sound forcing engineers to simplify the
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The original concept of the Main Street bridge was far more complex and costly than the final design. Initially, the bridge called for a very shallow 10:1 span-to-rise ratio for the main arch, creating significant axial and bending forces. To accommodate the excess forces, the design called for
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The Main Street bridge also calls for thirteen L-struts, which would attach the arch to the bridge deck. Their original design used tapering geometries which were different for each strut. Creating, designing and testing thirteen distinct struts would have been cost-prohibitive, so engineers
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The original Main Street bridge was a
Whipple through truss bridge built in 1890 over the Scioto River. It was lengthened in 1917 using two spans salvaged from a railroad bridge a short distance downstream of the bridge. In the 1930s, it was replaced with a multiple-span,
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simplified the designs to reduce costs. While the aesthetics of the original design changed because of the more uniform strut design, they are similarly appealing and reduce the components' weight by over 400,000 lb (180,000 kg).
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open-spandrel concrete deck arch bridge, built in 1937. After years of degradation due to weather and traffic, the bridge was deemed unfit for use and closed in 2002. The 1937 bridge was part of the
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While the redesign of the original concept altered the deck supports, the actual construction of the decks changed only slightly to accommodate the new design.
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Wanting an iconic structure to replace the old bridge, the city of
Columbus contracted Dr. Spiro Pollalis, professor of design technology and management at the
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piers. To do so they created a 'crescent pier' shape, which removes the two smaller arches on either end and creates a larger pier to provide better support.
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and the fifth in the world to use an inclined single-rib-tied arch superstructure. The final cost for the bridge was $ 60.1 million. It carries Main Street (
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to design the bridge. His design, altered slightly for budget reasons, opened for traffic on July 30, 2010.
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594:"Main Street Dam Removal & Scioto Greenways Feasibility Study"
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660:. Genesis Structures, Inc. November 13, 2007. Archived from
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Open-spandrel deck arch bridges in the United States
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Bridges of the United States
Numbered Highway System
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another $ 10 million to the structure's final cost.
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is a 700 ft (210 m), three-span, inclined
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616:"NBC 4 Digs Into Over-Budget Main Street Bridge"
350:Side view of the bridge looking toward Columbus
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332:Harvard University Graduate School of Design
485:"Main Street bridge's arch makes it unique"
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576:"Main Street Bridge (Old Truss Bridge)"
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325:Columbus Civic Center Historic District
810:Tied arch bridges in the United States
550:"Main Street bridge opened to traffic"
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785:Concrete bridges in the United States
624:. nbc4i. May 20, 2009. Archived from
483:McConnell, Mollie (January 5, 2014).
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655:"The Main Street Bridge Replacement"
805:Steel bridges in the United States
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404:1937 bridge specifications plaque
150:Ohio Department of Transportation
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548:Potthoff, Gina (July 30, 2010).
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428:Railing from the original bridge
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596:. Stantec. 2012. pp. 14–15
491:. The Dispatch Printing Company
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780:Bridges over the Scioto River
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278:. The bridge is the first in
16:Overpass on the Scioto River
452:Binoculars for city viewing
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770:Bridges in Columbus, Ohio
765:Bridges completed in 2010
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729:
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321:Scioto River Bridge Group
310:1937 bridge in foreground
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212:2 eastbound, 1 westbound,
190:about 65 feet (20 m)
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741:Lower Scioto Rail Bridge
692:at Bridges & Tunnels
790:Downtown Columbus, Ohio
63:39.956051°N 83.006596°W
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554:The Columbus Dispatch
489:The Columbus Dispatch
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198:400 feet (120 m)
182:700 feet (210 m)
68:39.956051; -83.006596
800:Road bridges in Ohio
520:DowntownColumbus.com
516:"Main Street Bridge"
628:on January 29, 2013
59: /
731:Main Street Bridge
720:Rich Street Bridge
690:Main Street Bridge
464:Nighttime lighting
440:Pedestrian walkway
416:Historical plaques
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288:Ohio State Route 3
260:Main Street Bridge
224:Construction start
25:Main Street Bridge
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701:Crossings of the
667:on March 28, 2012
292:Downtown Columbus
290:) northwest from
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174:inclined arch
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703:Scioto River
671:November 13,
669:. Retrieved
662:the original
630:. Retrieved
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495:December 14,
493:. Retrieved
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276:Scioto River
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214:1 pedestrian
195:Longest span
179:Total length
130:Scioto River
18:
364:Bridge deck
296:Franklinton
66: /
41:Coordinates
759:Categories
737:Downstream
470:References
93:US 62
54:83°00′24″W
51:39°57′22″N
274:over the
235:July 2010
157:ID number
97:SR 3
716:Upstream
373:L-struts
317:art-deco
264:Columbus
248:Location
95: /
621:WCMH-TV
391:Gallery
302:History
219:History
161:2503220
126:Crosses
79:Carries
632:May 1,
560:May 1,
530:May 1,
342:Design
240:Opened
171:Design
136:Locale
665:(PDF)
658:(PDF)
382:Piers
294:into
208:lanes
187:Width
673:2007
634:2012
602:2022
562:2012
532:2012
497:2014
355:Arch
286:and
268:Ohio
258:The
227:2006
262:in
206:of
204:No.
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120:9
116:6
112:3
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
