Description
Excerpt from Final Report of John A. Roebling, Civil Engineer, to the Presidents and Directors of the Niagara Falls Suspension and Niagara Falls International Bridge Companies: May 1, 1855
The aggregate section of the upper links of the four chains is 372 square inches, and their ultimate strength at 32 tons, equal to I tons. The strain upon the lowest link is at least diminished one-third, which leaves 7936 tons. This pressure on the New York Side is resisted by a sheet of solid rock of no less ex tent than 100 ft. Long, 70 ft. Wide, and 20 ft. Deep. Thisrock weighs about 160 lbs. Per cubic foot. Now assuming only 200 lbs. Of resistance in the solid rock, we have a mass Of cubic ''feet, opposing a force of tons, without taking into account the weight of the superincumbent masonry and embank ment. Admitting that the rock was full of, fissures and seams, which is not the case, the entire safety of the anchorage is evident.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
The aggregate section of the upper links of the four chains is 372 square inches, and their ultimate strength at 32 tons, equal to I tons. The strain upon the lowest link is at least diminished one-third, which leaves 7936 tons. This pressure on the New York Side is resisted by a sheet of solid rock of no less ex tent than 100 ft. Long, 70 ft. Wide, and 20 ft. Deep. Thisrock weighs about 160 lbs. Per cubic foot. Now assuming only 200 lbs. Of resistance in the solid rock, we have a mass Of cubic ''feet, opposing a force of tons, without taking into account the weight of the superincumbent masonry and embank ment. Admitting that the rock was full of, fissures and seams, which is not the case, the entire safety of the anchorage is evident.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Details
Publisher - Forgotten Books
Language - English
Hardback
Contributors
Author
John A. Roebling
Published Date -
ISBN - 9780265964019
Dimensions - 22.9 x 15.2 x 0.3 cm
Page Count - 49
Paperback
Contributors
Author
John A. Roebling
Published Date -
ISBN - 9781527847491
Dimensions - 22.9 x 15.2 x 0.3 cm
Page Count - 51
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.