Roebling Bridge Stone n Wood
by Randall Branham
Title
Roebling Bridge Stone n Wood
Artist
Randall Branham
Medium
Photograph - Photography /photo Art
Description
This is photoart texture and image overlay.The John Roebling Bridge in Cincinnati is made of Stone ,but is built on a foundation of waterlogged Timbers. Waterlogged timbers kept under water will not rot as long as no oxygen gets to them.The digging of the foundation of the Covington tower commenced in September 1856 and went smoothly. A foundation was set consisting of 13 layers of oak beams, each layer set perpendicular to the one beneath it, bolted with iron hardware, and finally all cemented into place. On the Cincinnati side, work was delayed from the start. The construction crews could not pump water out of the excavating pit fast enough. They were attempting to dig to bedrock in the middle of a flowing river. After months of a virtual stand-still, Roebling decided against buying costly machinery or bigger engines for his pumps and, quite last minute, designed his own square positive displacement pumps from three-inch (76 mm) pine planks. He built them locally in about forty-eight hours and ran them off of one of Amos Shinkles� tugboats, the Champion No.1. The homemade pumps displaced forty gallons of mud and clay in each cycle.
Uploaded
February 13th, 2014
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Viewed 180 Times - Last Visitor from Cambridge, MA on 04/19/2024 at 3:50 PM
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