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 30
... height of place of observation above or below the sea in feet . H = 513 T + T2 . Example . T = 212 ° 208 ° - 4 ° . H = ( 513 X 4 ) + 42 = 2068 feet . XII . SETTING SLOPE STAKES . 1. Like swallowing , this is more easily done than ...
... height of place of observation above or below the sea in feet . H = 513 T + T2 . Example . T = 212 ° 208 ° - 4 ° . H = ( 513 X 4 ) + 42 = 2068 feet . XII . SETTING SLOPE STAKES . 1. Like swallowing , this is more easily done than ...
Página 31
... height above grade at the proposed section . This is usually done by refer- ence to the nearest bench , and pegging from stake to stake as the work progresses . Unless the ground is very steep , and the slope - stakes largely different ...
... height above grade at the proposed section . This is usually done by refer- ence to the nearest bench , and pegging from stake to stake as the work progresses . Unless the ground is very steep , and the slope - stakes largely different ...
Página 32
... height , 15.5 feet above grade This gives him a point in the air , 10 15.5 = 25.5 feet out from the centre stake , level with the instrument , as the limit of the imaginary section ; and from that point he can pretty well judge where a ...
... height , 15.5 feet above grade This gives him a point in the air , 10 15.5 = 25.5 feet out from the centre stake , level with the instrument , as the limit of the imaginary section ; and from that point he can pretty well judge where a ...
Página 33
... height of embankment above the points at which rods are taken . 14. Consider the down - hill side . The engineer , with the centre stake to aid him in forming an airy image ground in view , and with the height of embankment at the ...
... height of embankment above the points at which rods are taken . 14. Consider the down - hill side . The engineer , with the centre stake to aid him in forming an airy image ground in view , and with the height of embankment at the ...
Página 34
... height of of 23 = 15.3 feet ; and , since the instrument is 1 foot be- low grade , to a rod at the supposed embankment base of 153 - 1.0 = = 14.3 feet . But the rod at that point is only 11 feet , to which , if 1 foot , the distance of ...
... height of of 23 = 15.3 feet ; and , since the instrument is 1 foot be- low grade , to a rod at the supposed embankment base of 153 - 1.0 = = 14.3 feet . But the rod at that point is only 11 feet , to which , if 1 foot , the distance of ...
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