Surveying, Land Surveying, Mapping, Railroad Location, Railroad Construction, Track Work, Railroad Structures |
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abutments ballast batter bearing bolts borrow pits braces bridge caisson caps center line central angle cents per cubic chord cofferdam contour contour lines contractor corner cost course creosote oil cross-section cubic yard culvert deflection depth diameter dimensions direction distance drift-bolted drills driven elevation embankment engineer equal excavation factor of safety fastened foot foundation frog gauge given grade ground guard-rails head height hole horizontal inches intersection iron joints laid latitudes and departures load main track marked masonry material measured meridian mile mortise and tenon notched piles placed plat plumb-bob posts radius railroad right angles road rock scale shown in Fig side sills slope space spikes square stake station stone stringers surface sway-braces switch switch rods tangent thickness timber tion township trestle triangle tunnel turnout curve vertical wall wheels width
Popular passages
Page 703 - Both banks of navigable rivers are to be meandered by taking the courses and distances of their sinuosities, and the same are to be entered in the field book.
Page 601 - If two triangles have two sides, and the included angle of the one equal to two sides and the included angle of the other, each to each, the two triangles are equal in all respects.
Page 695 - The sections and half sections bounded on the northern and western lines of such townships shall be sold as containing only the quantity expressed in the returns and plats, respectively, and all others as containing the complete legal quantity...
Page 603 - Now, since the areas of similar polygons are to each other as the squares of their homologous sides...
Page 703 - ... lines, and to lay out the same into tracts as far as practicable, of fifty-eight poles in front and four hundred and sixty-five poles in depth, of such shape, and bounded by such lines as the nature of the country will render practicable, and most convenient: Provided however.
Page 705 - A sufficient number of other trees standing nearest to your line, on either side of it, are to be blazed on two sides, diagonally or quartering towards the line, in order to render the line conspicuous, and readily to be traced, the blazes to be opposite each other, coinciding in direction with the line where the trees stand very near it, and to approach nearer each other, the further the line passes from the blazed trees. Due care must ever be taken to have the lines so well marked as to be readily...
Page 720 - When the bearing is over 45°, the names of the columns must be read from the bottom of the page, the Latitude of any bearing, as 50°...
Page 706 - ... in the figure. On each surface of the post is to be marked the number of the particular township, and its range, which it faces. Thus, if the post be a common boundary to four townships, say one and two, south of the base line, of range one, west of the meridian ; also to townships one and two, south of the base line, of range two, west of the meridian, it is to be marked thus : The position of the post which is here taken as an example, is shewn in the following diagram.
Page 604 - ... 18' :: 113.098 : area required, or 144 : 324 :: 113.098 : 254.47 sq. in. 1191. An angle formed by a tangent and a chord meeting at the point of contact is measured by half the included arc. Thus, in Fig. 241, the angle ACD formed by the meeting of the tangent AB and the chord CD is measured by half the arc CE D. Similarly, the -B angle BCD is measured by half the arc C D. 1192. Two tangents to a circle drawn from any point are equal, and if a chord be drawn joining these tangent points, the angles...
Page 1219 - T. 11l.—liO continued disregard for this clause will, if deemed necessary by the engineer, be considered as a good and sufficient reason for declaring the contract forfeited. DAMAGES AND TRESPASS. Contractors shall be liable for all damages to landholders, arising from loss of or injury to crops...