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| Keywords: Beaver rail bridge HAER PA,4-BEAV,1-1.png Beaver Bridge Ohio River Pittsburgh Lake Erie Railroad Ohio River Bridge Spanning Ohio River West of Beaver River Beaver Beaver PA Overview of east elevation looking SW Building/structure dates 1908 initial construction The bridge is significant for its relatively long and heavy cantilever truss planned shortly before the Quebec cantilever bridge collapse of 1907 Rather than select a different design the railroad proceeded implementing design checks and strict quality control procedures Despite a conservative overall design the bridge includes a number of innovative structural details The substructure is also significant for its early use of concrete pier caissons Call Number HAER PA 4-BEAV 1- Repository Library of Congress Prints and Photographss Division Washington D C 20540 USA 5 × 7 in Survey number HAER PA-510 LOC-image hhh pa3716 http //www loc gov/pictures/item/PA3716/ †’ http //lcweb2 loc gov/cgi-bin/displayPhoto pl path /pnp/habshaer/pa/pa3700/pa3716/photos topImages 361923pr jpg topLinks 361923pv jpg 361923pu tif title HAER 20PA 4-BEAV 1-1 displayProfile 0 †’ http //lcweb2 loc gov/pnp/habshaer/pa/pa3700/pa3716/photos/361923pu tif spring 1999 creator Jet Lowe Historic American Engineering Record Library of Congress File Beaver rail bridge HAER PA 4-BEAV 1-1 crop jpg 40 6979 -80 2873 region US_scale 20000_heading SW cropped scaled down due to current 12 5 Mpx limit Saibo see file history PA3716 Beaver Bridge Ohio River Black and white photographs of the United States Jet Lowe | ||||
