Cole's Permanent Way  By Colonel Sir Gorden Hearn Hard

Cole's Permanent Way By Colonel Sir Gorden Hearn Hard

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Cole's Permanent Way By Colonel Sir Gorden Hearn Hard
 
Coles Permanent Way  By Colonel Sir Gorden Hearn Hard Cover 1940 Material, maintenance, points and crossings    196 Pages
MORE than fifty years have elapsed since the late Mr. W. H. Colo wrote this standard work, then containing only ninety pages. For the last three editions I have been responsible. In accordance with the wise policy of the Publishers, this edition has been almost entirely recast and re-written. It includes modern methods demanded by ever heavier loads running at increasing speeds. It deals with all gauges and gives examples of practice almost all over the world, a claim which is believed to be unique. The first chapter deals with standards and components of track, entering into their specifications and manufacture only in so far as the Permanent Way man should know why components differ in composition. Recent researches into track stresses and their effects are described. Perhaps the most startling innovation has been the modification of long standing practice by a reduction of superelevation on curved track, bringing with it the necessity for string lining curves regularly.
The second chapter describes in groat detail the operations required to maintain the track to a high standard, with particular attention to Safety First in the proper use of tools. It is probable that Engineers and Inspectors, in these days when job analysis is necessary, may disagree with some of the methods, but they may well consider whether their practices in particular circumstances may not be improved after a comparison.
In the third chapter the organisation of Relaying or Renewal of track precedes the organisation of Laying. The mileage of now construction has shrunk to a small figure and, indeed, many miles have been abandoned owing to the competition of other forms of transport.
The fourth chapter deals with Points and Crossings to the extent to which an Inspector should understand this important subject. The Theory has been much simplified. It is shown that Cole's Method is a particular case of the usual method by which the turnout curve is made tangential to the switch and the crossing. The cross-distance is not often or necessarily the track gauge, the springing or origin of the curve being offset from the gauge line. A French development which continues the curve beyond the nose of the crossing will be found of interest. Wholly curved tongues as used on the Groat Western Railway and in France are described.
Other mathematical calculations are collected in the fifth chapter including those necessary for string lining and for other problems connected with curves, and with points and crossings. At the same time practical considerations are given full weight. One major error has been corrected. The track gauge formerly taken in certain calculations should have been the centre to centre distance of rails.
Some of the new matter has been derived from discussions with fellow members of the " Permanent Way Institution " at meetings and conventions. Special thanks are due to Mr. Raymond Carpmael, Chief Engineer of the Groat Western Railway, to Messrs. Rendel, Palmer and Tritton, for recent Indian practice, to Messrs. Livesey and Henderson, for Argentine practice, to Mr. Foxley, of the Crown Agents for the Colonies for Colonial practice, and to other friends and correspondents who have kindly criticised or have supplied information.


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