Rudiments of the Art of Constructing and Repairing Common Roads

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J. Weale, 1850 - 136 pages
 

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Page 53 - It would, however, be attended with considerable expense, and it would be requisite to construct a much greater length of road than according to the second plan, which would be to form, as before, a straight road from A to B, and from c to construct a road which should join the former at a point D, so as to be perpendicular to it ; the traffic between A or B and c, would proceed to the point D, and then turn off to c.
Page 84 - ... inches, in any case. All the irregularities of the upper part of the said pavement are to be broken off by the hammer, and all the interstices to be filled with stone chips, firmly wedged or packed by hand, with a light hammer ; so that when the whole pavement is finished, there shall be a convexity of 4 inches in the breadth of 15 feet from the centre.
Page 53 - ... road than according to the second plan, which would be to form, as before, a straight road from A to B, and from C to construct a road which should join the former at a point D, so as to be perpendicular to it. The traffic between A or B and C would proceed to the point D and then turn off to C. With this arrangement, while the length of the roads would be very materially decreased, only a slight increase would be occasioned in the distance between C and the other two towns. The third method...
Page 61 - What additional increase in the length of a road would be equivalent to a given inclined plane upon it; or conversely, what inclination might be given to a road as an equivalent to a given decrease in its length? To satisfy this question...
Page 60 - ... between the places is not sufficient to warrant so great an outlay, it will become a matter of consideration whether the course of the road should be kept straight, its surface being made to undulate with the natural face of the country ; or whether, a level or...
Page 53 - Fia. 1. c the intervening country ; assuming that it is equally favourable, whatever line we select. Now, at first sight, it would appear that, under such circumstances, a perfectly straight line drawn from one town to the other would be the best that could be chosen.
Page 84 - Upon the level bed prepared for the road materials a bottom course or layer of stones is to be set by hand in the form of a close firm pavement. The stones set in the middle of the road are to be seven inches in depth; at nine feet from the centre, five inches; at twelve feet from the centre, four inches; and at fifteen feet from the centre, three inches.
Page 94 - ... will be found to last as long as double the quantity put on unprepared and in thick layers. There is no grinding to pieces when so applied ; the angles are preserved, and the material is out of sight and incorporated in a very little time. Each stone becomes fixed directly, and keeps its place, thereby escaping the wear and fretting which occur in the other case.
Page 60 - ... the course of the road should be made to deviate from the direct line, and follow the winding course which such a condition is supposed to necessitate. In the second case, that of two places situated on opposite sides of the same valley, there is, in like manner, the choice of a perfectly straight line to connect them, which would probably require a...

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