The Progress of the Century
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In our eReader you can find the full English version of the book. Read The Progress of the Century Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Progress of the Century
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The open-hearth process is now generally used. This new chemical met- al, for such it is, is fifty per cent, stronger than iron, and can be tied in a knot when cold.
The effect of improved devices and the use of steel is shown by the weights of the 400-foot Ohio River iron bridge, built in 1870, and a bridge at the same place, built in 1886.
The bridge of 1870 was of iron, had panels twelve feet long, and its height was forty-five feet, and span 400 feet.
The bridge of 1886 was of steel, had pa...nels thirty feet long, and its height was eighty feet. Its span was 550 feet. The weights of the two were nearly alike.
The cantilever design, which is a revival of a very ancient type, came into use. The great Forth Bridge, in Scotland, 1600-foot span, is of this style, as are the 500-foot spans at Poughkeepsie, and now a new one is being designed to cross the St. Lawrence near Quebec, of 1800-foot span.
This is probably near the economic limit of cantilever construction, but the suspension bridge can be extended much farther, as it carries no dead weight of compres- sion members.
What to read after The Progress of the Century?
You can find similar books in the "Read Also" column, or choose other free books by Wallace, Alfred Russel, 1823-1913 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The open-hearth process is now generally used. This new chemical met- al, for such it is, is fifty per cent, stronger than iron, and can be tied in a knot when cold.
The effect of improved devices and the use of steel is shown by the weights of the 400-foot Ohio River iron bridge, built in 1870, and a bridge at the same place, built in 1886.
The bridge of 1870 was of iron, had panels twelve feet long, and its height was forty-five feet, and span 400 feet.
The bridge of 1886 was of steel, had pa...nels thirty feet long, and its height was eighty feet. Its span was 550 feet. The weights of the two were nearly alike.
The cantilever design, which is a revival of a very ancient type, came into use. The great Forth Bridge, in Scotland, 1600-foot span, is of this style, as are the 500-foot spans at Poughkeepsie, and now a new one is being designed to cross the St. Lawrence near Quebec, of 1800-foot span.
This is probably near the economic limit of cantilever construction, but the suspension bridge can be extended much farther, as it carries no dead weight of compres- sion members.
What to read after The Progress of the Century?
You can find similar books in the "Read Also" column, or choose other free books by Wallace, Alfred Russel, 1823-1913 to read onlineMoreLess
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