A Treatise on Roads: Wherein the Principles on which Roads Should be Made are Explained and Illustrated, by the Plans, Specifications, and Contracts Made Use of by Thomas Telford, Esq. on the Holyhead RoadLongman, Orme, Brown, Green, and Longmans, 1838 - 465 pàgines |
Des de l'interior del llibre
Resultats 1 - 5 de 45.
Pàgina 27
... laying out roads with the spirit level . The road from Dumfries to Castle Douglas was traced out by him , so as to have no greater inclination than 1 in 40 , although passing through a very hilly country . Mr. Abercromby pursued , as a ...
... laying out roads with the spirit level . The road from Dumfries to Castle Douglas was traced out by him , so as to have no greater inclination than 1 in 40 , although passing through a very hilly country . Mr. Abercromby pursued , as a ...
Pàgina 37
... laying out a road in a hilly country , the spirit - level is essentially necessary to show the proper line of road to be selected . The general rule to be followed in surveys is to pre- serve the straight line , except when it becomes ...
... laying out a road in a hilly country , the spirit - level is essentially necessary to show the proper line of road to be selected . The general rule to be followed in surveys is to pre- serve the straight line , except when it becomes ...
Pàgina 42
... laying out a line of new road , never , if possible , to have a greater inclination than that of 1 in 35. Particular cir- cumstances may , no doubt , require a deviation from this rule ; but nothing except a clear case that the circuit ...
... laying out a line of new road , never , if possible , to have a greater inclination than that of 1 in 35. Particular cir- cumstances may , no doubt , require a deviation from this rule ; but nothing except a clear case that the circuit ...
Pàgina 46
... laying the materials taken from them in the hollow parts . But this must be regu- lated by the expense to be incurred , which is a main consideration , always to be scrupulously attended to before an engineer decides upon the relative ...
... laying the materials taken from them in the hollow parts . But this must be regu- lated by the expense to be incurred , which is a main consideration , always to be scrupulously attended to before an engineer decides upon the relative ...
Pàgina 47
... laying on materials will be very much increased . The great fault of most roads in hilly countries is that after ascending a considerable height , they constantly descend again before they gain the sum- mit of the country which they ...
... laying on materials will be very much increased . The great fault of most roads in hilly countries is that after ascending a considerable height , they constantly descend again before they gain the sum- mit of the country which they ...
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Altres edicions - Mostra-ho tot
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualització completa - 1837 |
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualització completa - 1838 |
A Treatise on Roads: Wherein the Principles on which Roads Should be Made ... Sir Henry Parnell Visualització completa - 1833 |
Frases i termes més freqüents
Allesley arch Archway Road axles bottom breadth brick bridge broken stones built carriage centre coach coating commissioners constructed contract contractor Coventry cross drains DAVIES GILBERT depôts depth draught dynamometer earth eighteen inches elasticity embankments engineer expense experiments feet wide fences foot footpath fore wheels formed foundation four inches friction gravel ground half hard Hartshill height hill hind wheels Holyhead Road horizontal horses improvement inches deep inches thick inches wide instrument John Kershaw John Macneill labour laid length line of road manner masonry ment miles mortar mound necessary nine inches paved pavement placed Plate VII proper quicksets rails rates of inclination repair road-making roadway ruts side channels side springs six inches slopes specification spirit level springs square streets surface surveyor Telford theodolite Thomas Baylis three feet three inches trustees turnpike roads turnpike trusts upper velocity waggon whole wing walls
Passatges populars
Pàgina 20 - They will here meet with rutts which I actually measured four feet deep, and floating with mud only from a wet summer; what therefore must it be after a winter?