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 |
Dentro del libro
Página x
... curve . A. D. Apex distance : i.e. , the distance from the P. I. to the ... curvature : the stake - mark where a curve merges in another of different curvature , turn- ing in the same direction . P. R. C. ... 4 4 LOGARITHMS x ABBREVIATIONS .
... curve . A. D. Apex distance : i.e. , the distance from the P. I. to the ... curvature : the stake - mark where a curve merges in another of different curvature , turn- ing in the same direction . P. R. C. ... 4 4 LOGARITHMS x ABBREVIATIONS .
Página 36
... curve extending 150 feet each way . A circular arc consuming so small an angle may be treated as a parabola , in which the external secant BF is equal to the versed sine F D. Referring to the above diagram , ordinates 4 and 8 will be ...
... curve extending 150 feet each way . A circular arc consuming so small an angle may be treated as a parabola , in which the external secant BF is equal to the versed sine F D. Referring to the above diagram , ordinates 4 and 8 will be ...
Página 38
... 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 ... 4 . Elevation at A = + 94.0 ; 94.0 94.47 94.87 95.22 95.5 95.72 95.87 95.97 96.0 38 VERTICAL CURVES .
... 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 ... 4 . Elevation at A = + 94.0 ; 94.0 94.47 94.87 95.22 95.5 95.72 95.87 95.97 96.0 38 VERTICAL CURVES .
Página 39
... 4 0 4 8 94.0 93.75 93.5 93.25 93.0 C 92.75 92.5 From which deduct the ordinates just found , 0.0 0.21 0.33 0.37 0.33 0.21 0.0 And the grade elevations on the curve will be : - 94.0 93.54 93.17 92.88 92.67 92.54 92.5 The figures are ...
... 4 0 4 8 94.0 93.75 93.5 93.25 93.0 C 92.75 92.5 From which deduct the ordinates just found , 0.0 0.21 0.33 0.37 0.33 0.21 0.0 And the grade elevations on the curve will be : - 94.0 93.54 93.17 92.88 92.67 92.54 92.5 The figures are ...
Página 52
... 4 , angle E AB = EBA = AGE = EGB = 1 . = 3. GIVEN THE INTERSECTION ANGLE I AND RADIUS R , TO FIND THE TANGENT T. T = RX tan . I. R = 1,910.1 , I = 35 ° 24 !. Example . Then T = R tan . I = 1,910.1 × 0.3191 = 609.5 . 4 ... RADIUS OF A CURVE .
... 4 , angle E AB = EBA = AGE = EGB = 1 . = 3. GIVEN THE INTERSECTION ANGLE I AND RADIUS R , TO FIND THE TANGENT T. T = RX tan . I. R = 1,910.1 , I = 35 ° 24 !. Example . Then T = R tan . I = 1,910.1 × 0.3191 = 609.5 . 4 ... RADIUS OF A CURVE .
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