Spalding, Frederick P. (Frederick Putnam), 1857-1923
The book A Text-Book On Roads And Pavements was written by author Spalding, Frederick P. (Frederick Putnam), 1857-1923 Here you can read free online of A Text-Book On Roads And Pavements book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Text-Book On Roads And Pavements a good or bad book?
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Wood pavements are commonly constructed of blocks set with the fibres vertical, so that wear comes upon the ends of the fibres and has no tendency to split pieces off from the blocks. Cedar blocks are used in the form of whole sections of the tree, on account of the liability of the wood to split off between the layers when cut to a rectangular shape. They are usually of an approxi- mately cylindrical form, varying from 4 to 9 inches in diameter and 5 to 8 inches in depth. Commonly the whole se...ction is used with the bark removed, giving blocks somewhat irregular in shape. In some cases the WOOD PAVExMENTS. 1 53 blocks are, however, cut to a true cylindrical form, the sapwood as well as the bark being cut away, by passing them through a set of knives which are gauged to turn out cylinders of given size. Several sets of knives are employed, giving blocks of varying sizes, each block being cut sufficiently to eliminate all sapwood with as little waste of good material as possible. The use of sapless blocks increases the life of the pavement by augmenting the resistance of the material both to wear of the traffic and to the disintegrating influences of the atmosphere and moisture.
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