The Field Engineer: A Handy Book of Practice in the Survey, Location, and Trackwork of Railroads; Containing ... Rules and Tables ... Applicable to ... the Standard and the Narrow Gauge ...D. van Nostrand, 1880 - 318 páginas |
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Página 34
... grade , be added , the height of embankment would be 12 feet . He may then , as in the case of the upper slope in ... grade ; centre cutting 2.5 feet . Find first , with a 6.5 feet rod , the grade point , to left of centre line , which ...
... grade , be added , the height of embankment would be 12 feet . He may then , as in the case of the upper slope in ... grade ; centre cutting 2.5 feet . Find first , with a 6.5 feet rod , the grade point , to left of centre line , which ...
Página 35
... grade . Then set the lower slope stake as in Example No. 2 , observing that in this --23 : 5- -20.4 A -1 / 2 - TO - 1- -18.3- 3.5-10.0-- 6.5 -14.6- -13.1 -9-0- -3.8- -12.8- case the instrument is above grade , and that its height above ...
... grade . Then set the lower slope stake as in Example No. 2 , observing that in this --23 : 5- -20.4 A -1 / 2 - TO - 1- -18.3- 3.5-10.0-- 6.5 -14.6- -13.1 -9-0- -3.8- -12.8- case the instrument is above grade , and that its height above ...
Página 36
... multiplied by 0.89 and 0.55 respectively . Adding these multiples to the grade elevation at A , the elevations of the intermediate points = Elevation at A 100 ; AD , DC , selected will be ascertained . 36 VERTICAL CURVES .
... multiplied by 0.89 and 0.55 respectively . Adding these multiples to the grade elevation at A , the elevations of the intermediate points = Elevation at A 100 ; AD , DC , selected will be ascertained . 36 VERTICAL CURVES .
Página 37
... grade at 4 4 : Elevation of grade at D - = ― 94.0+ 0.67 = 94.67 . 94.0 + 0.75 94.75 . Example 2 . = B E D H = 0.4 Elevation at A +94.0 . AB + 1 in 100 ; BC —— in 100 ; A H , level ; AD , DH , each = 200 feet , or 2 stations , divided ...
... grade at 4 4 : Elevation of grade at D - = ― 94.0+ 0.67 = 94.67 . 94.0 + 0.75 94.75 . Example 2 . = B E D H = 0.4 Elevation at A +94.0 . AB + 1 in 100 ; BC —— in 100 ; A H , level ; AD , DH , each = 200 feet , or 2 stations , divided ...
Página 38
... grade elevations on the curve will be : - - 94.0 94.46 94.82 95.11 95.30 95.41 95.42 95.36 95.2 Example 3 . Elevation at A + 94.0 ; A B - +1 in 100 ; BC , AH , level . AD , BC , each 200 feet divided into 50 - feet spaces , the points ...
... grade elevations on the curve will be : - - 94.0 94.46 94.82 95.11 95.30 95.41 95.42 95.36 95.2 Example 3 . Elevation at A + 94.0 ; A B - +1 in 100 ; BC , AH , level . AD , BC , each 200 feet divided into 50 - feet spaces , the points ...
Otras ediciones - Ver todas
The Field Engineer: A Handy Book of Practice in the Survey, Location and ... William F. Shunk Sin vista previa disponible - 2008 |
The Field Engineer: A Handy Book of Practice in the Survey, Location, and ... William Findlay Shunk Sin vista previa disponible - 2017 |
Términos y frases comunes
100 feet long 100-feet chords adjustment apex distance called central angle column Cosine 1 Sine Cotang cross-hair Cube Roots decimals deflection distance degree of curvature DEGREE OF CURVE Diff divided elevation engineer equal Example feet figure fixed foregoing frog angle Full Gauge gauge of track gauge side gent ground index angle instrument intersection angle length of switch-rail located logarithm M.
M. I Sine Main frog dist mantissa mark measure method middle frog middle ordinate middle point minutes Multiply observation outer rail parallel perpendicular quotient radii radius range Reciprocals REVERSED CURVE right triangle screws slope Square Roots standard gauge straight line sub-chord subtended Subtract Suppose Table XVI tabular tance Tang tangent A B tangential angle tangential distance telescope terminal tangent tion toe of switch Trigonometry turnout curve vernier versin vertical ΙΟ ΤΑΝ
Pasajes populares
Página 18 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Página 4 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 11 - ... is supposed to be divided into 60 equal parts, called minutes; and each minute into 60 equal parts, called seconds. Degrees, minutes, and seconds, are designated respectively, by the characters ° ' ". For example, ten degrees, eighteen minutes, and fourteen seconds, would be written 10° 18
Página 4 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers. log» MN = log» M + log