This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 Excerpt: ...as it may be made more even. It will therefore offer less resistance to traction, and be less severe upon vehicles and animals. The fragments of stone are such as can usually be selected, or produced with very little labor from the refuse of a stone quarry. The dimensions may vary from 3 to 6 inches in breadth and G to ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 Excerpt: ...as it may be made more even. It will therefore offer less resistance to traction, and be less severe upon vehicles and animals. The fragments of stone are such as can usually be selected, or produced with very little labor from the refuse of a stone quarry. The dimensions may vary from 3 to 6 inches in breadth and G to 12 inches in length, while the depth, to prevent their tilting up, should not be less than 5 or 6 inches. They are laid like cobble stones, in a form of sand or gravel, each stone being carefully adjusted to its place, so that when it has been properly rammed its top face will coincide with the required surface of the pavement. Continuous joints in the direction of the draught should be avoided, in order to guard against the tendency to wear into rute. To this end the long stones should not be set with their largest dimensions parallel to the sidewalks. A rubble stone pavement laid in the manner above indicated, forms a good foundation for a pavement of stone blocks, and they may be laid upon a layer of sand or gravel about one inch thick, or in a bed of cement mortar, preferably the latter, although attended with some extra expense. Concrete Foundations, Foundations of concrete, for street pavements, may be laid by the same method, and the concrete should be made after the same formula already laid down for roads, except that they should generally be somewhat thicker, to enable them to withstand the heavy traffic which passes over them in most cities and large towns. Upon firm and nearly incompressible soils, a thickness of 6 to 7 inches properly rammed in one or two layers, will ordinarily suffice, but in soils of a spongy, elastic nature, or largely composed of clay, a thickness of 8 to 9, or even 10 inches, will not be excessive. Though t...
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