File:Image from page 21 of "City roads and pavements suited to cities of moderate size." (1902).jpg

English: Caption:

Ancient Roman Road.

Identifier: cityroadspavemen00juds Title: City roads and pavements suited to cities of moderate size. Year: 1902 (1900s) Authors: Judson, William Pierson, 1849-1925 Subjects: Streets Pavements Roads Publisher: New York : The Engineering news publishing company Contributing Library: The Library of Congress Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image: ne andone-half inches on each wheel; the four wheels thusstanding upon a total surface of twcK^e squai-e inches,with a total pressure of 5,200 pounds, or 433 pounds persquare inch, and this is applied with a rolling pressurew^hich is most destructive. COMPARISON WITH PRESSURE OF STRUCTURES. The degree of pressure which this puts upon anypavement will be best appreciated bv comparing it withthe pressures per square inch upon the clay, sand, orearth underlying the foundations of some well-knowngreat structures. The Cleveland viaduct 14 to 23 lbs. per sq. in. The 1894 London tower bridge 21 The sixteen-story office buildings of Chicago 21 The Memphis bridge piers ... 22 The Albany capitol 28 The Brooklyn bridge anchorage 56 The earth supporting these structures is, of course,compressed to the greatest degree in its natural forma-tion, but the average pressure of these structures is lessthan one-sixteenth of the pressure concentrated on anordinary wagon wheel. 15 CITY ROADS AND PAVEMENTS.

Text Appearing After Image: Ancient Roman Road,

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