Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 494
ints of the blocks. Asphalt Pavement with Concrete Foundation (Fig. 1124).—The subsoil orother matter shall be excavated and removed to the depth of 9 inches below thetop line of the proposed Trinidad asphalt pavement, which shall have a crownnot to exceed the rate of 5 inches on a roadway of 30… … ^ BINDER6C0N CRETE Fig. 1124. the entire road-bed to be thoroughly rolled with a heavy roller. Upon thefoundation thus prepared shall be laid a bed of hydraulic cement concrete, 6inches in thickness, which, if necessary, must be protected from the action ofthe sun and wind until set. Upon this…
Mechanical drawing
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