File:End panels of north truss at west end, showing complex bracing configuration - Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worcester County, MA HAER MASS,14-LANC.V,1-10.tif

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End panels of north truss at west end, showing complex bracing configuration - Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worcester County, MA
Title
End panels of north truss at west end, showing complex bracing configuration - Atherton Bridge, Spanning Nashua River on Bolton Road, Lancaster, Worcester County, MA
Description
J.H. Cofrode and Company; Phoenix Iron Company; Post, Simeon S; Wilder, Charles L; Thissle, Joshua; Thayer, Nathaniel; Hawley, Monica E, transmitter; Jackson, Donald C, transmitter; Massachusetts Department of Public Works, sponsor; Massachusetts Historical Commission, sponsor; Garvey, Jane F, sponsor; Turner, George R, sponsor; Roper, Stephen J, sponsor; Kapsch, Robert J, sponsor; Fitzgerald, Elsa, sponsor; Delony, Eric, project manager; Lowe, Jet, photographer; Stupich, Martin, photographer; Jackson, Donald C, historian; Hawley, Monica E, historian; Harshbarger, Patrick, historian; Schodek, Daniel L, delineator; Reese, Patricia, delineator; Kleinschmidt, Gary C, delineator; Payne, Chris, delineator; Fleisig, Morgan, delineator; Rowan, Mark C, delineator; Sosef, Rudolph, delineator; Bennett, Lola, historian; Healy, John, historian
Depicted place Massachusetts; Worcester County; Lancaster
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 MASS,14-LANC.V,1-10
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: The Atherton Bridge is an example of a hybrid pony-truss that bears a similarity to the Post truss. The bridge is 72 feet long, 18 1/2 feet wide, and is comprised of eight panels. It rests on granite abutments and was, at the time of its construction, the only iron bridge in Lancaster. Characteristics of the Post truss incorporated into the Atherton Bridge include compression members which incline towards the middle of the bridge, and tension rods which incline outwards. These tension rods and compression members extend over one panel except at the ends, where they extend over two. The compression members are formed of "Phoenix Columns," patented by the Phoenix Iron Company of Pennsylvania. The top chord consists of riveted compression members. The web members are joined to the top chord by pin connections while the web connections are joined to the bottom chord with screw connections. The bridge's wood and steel floor beams rest directly on the bottom chords of the truss. The floor beams support a wood plank deck. This structure retains an enormous amount of historical integrity. It is listed on the National Register of Historic Places. The Atherton Bridge is an unique variation on the metal truss designed by Simeon S. Post in the 1860s, and one of only a small number of Post-type bridges known to survive nationally. The Post truss enjoyed a brief period of popularity in the late 1860s and early 1970s and was used widely by railways for long-span river crossings. The Atherton Bridge is unique in that the web configuration resembles a Post truss, but the bridge does not incorporate Post's patented joints. The builders of the bridge, J.H. Cofrode and Company of Philadelphia, probably adapted the Post form for use in small highway bridges. The Atherton Bridge is locally significant as the first iron bridge erected in Lancaster. Although it has sustained structural damage from overloading, the bridge has not been significantly altered.
  • Unprocessed Field note material exists for this structure: FN-11
  • Survey number: HAER MA-17
  • Building/structure dates: 1870 Initial Construction
  • Building/structure dates: 1975 Subsequent Work
Source https://www.loc.gov/pictures/item/ma1171.photos.077122p
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 location42° 27′ 20.02″ N, 71° 40′ 25″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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current18:24, 21 July 2014Thumbnail for version as of 18:24, 21 July 20145,000 × 3,982 (18.99 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 20 July 2014 (1401:1600)

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