File:Detail of typical beam - lateral bracing bolted connection. View to northeast. - 86th Street Overpass, Spanning Interstate 35 and 80 at Northwest Eighty-sixth Street, Urbandale, Polk HAER IA-42-15.tif

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Summary[edit]

Detail of typical beam - lateral bracing bolted connection. View to northeast. - 86th Street Overpass, Spanning Interstate 35 and 80 at Northwest Eighty-sixth Street, Urbandale, Polk County, IA
Photographer

Related names:

Ashton, Edward L
Pullman Standard Car Manufacturing Company
Wegman-French, Lysa, transmitter
Title
Detail of typical beam - lateral bracing bolted connection. View to northeast. - 86th Street Overpass, Spanning Interstate 35 and 80 at Northwest Eighty-sixth Street, Urbandale, Polk County, IA
Depicted place Iowa; Polk County; Urbandale
Date Documentation compiled after 1968
Dimensions 4 x 5 in.
Current location
Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA http://hdl.loc.gov/loc.pnp/pp.print
Accession number
HAER IA-42-15
Credit line
This file comes from the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER) or Historic American Landscapes Survey (HALS). These are programs of the National Park Service established for the purpose of documenting historic places. Records consist of measured drawings, archival photographs, and written reports.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

Notes
  • Significance: Built as part of the earliest construction on America's interstate highway system, the 86th Street Overpass represents a formative exercise in welded aluminum construction. It was designed by noted Iowa engineer Ned Ashton, under contract with the Iowa State Highway Commission, as an alternative to steel for bridge construction. The bridge's serendipitous merger of structural aluminum and electric arc welding was unprecedented. Never before had one structure combined such novel materials and techniques as this 220-foot-long overpass in Urbandale. Aluminum soon fell into disfavor among structural engineers, however, rendering the 86th Street Overpass an engineering anomaly. The lightweight metal may never have caught on for bridge construction, but the 86th Street Overpass remains an important milestone in civil engineering history: the first welded aluminum bridge in the world.
  • Unprocessed Field note material exists for this structure: N956
  • Survey number: HAER IA-42
  • Building/structure dates: 1958 Initial Construction
Source https://www.loc.gov/pictures/item/ia0410.photos.195831p
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.
Object location41° 37′ 36.01″ N, 93° 42′ 42.98″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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current10:30, 14 July 2014Thumbnail for version as of 10:30, 14 July 20144,263 × 5,400 (21.96 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 11 July 2014 (1001:1200)

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