Author: Robert Dale Owen

Publisher:

Published: 2015-07-20

Total Pages: 150

ISBN-13: 9781331881230

Excerpt from A Brief Practical Treatise on the Construction and Management of Plank Roads Laying Out; Passion for straightness great error. Valiant effort of courage and science. Rule as to circuit that maybe profitably made to avoid a hill. Case in point. Increase by divergence small. Divergence from air-line perpendicular as well as horizontal. Northern and southern slopes. Trestle-bridges replacing embankments. How a little forethought may save money. Two examples. Curves. How to run them. Little engineering required; but, when really necessary, bad economy not to employ it; Grades; Traction, what. On level railway; on plank road; on macadamized road; on earth road. Rule of increased traction on ascents. Easy grades more necessary on plank roads than on earth roads. Reason of this. Angle of repose. What should be the maximum grade on plank roads. Grade of 1 in 30 very desirable. Grades on Chittenango and Mount Vernon roads. Comparative draught thence resulting. Steep ascents, as on some New York roads, to be avoided. Loss thereby; Construction: Excavation and Embankment; Grading should be let out by contract. General specifications. Excavation and embankment should balance. Stone culverts, specification and cost. Wooden culverts. Saving by narrow embankment When it should not be adopted; Construction: Superstructure; Superstructure should be laid down by days' work. Solidity the essential. Drainage indispensable. Ditches. Longitudinal slopes. Width of road-bed and of plank track. Capability of single track. Turn-outs. Side-slant. Road-bed should be raised on flat ground. Stringers. How their ends should be supported. Their distance apart. How to make road permanently solid. Great evil and loss from neglecting this. Roller. Other tools. New York scraper. Number of hands in a party. Foreman. How much a party should lay. Mode of proceeding in laying. Important that plank should be in regular piles About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.