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
Resultados 6-10 de 29
Página 34
... suppose the instrument height at A to be 6.5 feet above grade ; centre cutting 2.5 feet . Find first , with a 6.5 feet rod , the grade point , to left of centre line , which proves to be 2.5 feet out . Note it , and set a stake feet out ...
... suppose the instrument height at A to be 6.5 feet above grade ; centre cutting 2.5 feet . Find first , with a 6.5 feet rod , the grade point , to left of centre line , which proves to be 2.5 feet out . Note it , and set a stake feet out ...
Página 36
... Suppose gradients descending right and left at an equal rate from the summit B , and that it is required to truncate the summit with a vertical curve extending 150 feet each way . A circular arc consuming so small an angle may be ...
... Suppose gradients descending right and left at an equal rate from the summit B , and that it is required to truncate the summit with a vertical curve extending 150 feet each way . A circular arc consuming so small an angle may be ...
Página 42
... Suppose the tenth part of a foot to be marked off on a straight edge into ten equal parts , and that on another straight edge a space equal in length to nine of these parts is divided also into ten equal parts . The sub- divisions of ...
... Suppose the tenth part of a foot to be marked off on a straight edge into ten equal parts , and that on another straight edge a space equal in length to nine of these parts is divided also into ten equal parts . The sub- divisions of ...
Página 65
... suppose the line N CT to be drawn tangent to the curve at C. Then N D may be considered the tangential distance due to the whole chord , = 5.95 , as above determined . The angle O CN = TCB = P BC ( XVI . , 4 ) ; and ( 5 ) ON : ND :: BC ...
... suppose the line N CT to be drawn tangent to the curve at C. Then N D may be considered the tangential distance due to the whole chord , = 5.95 , as above determined . The angle O CN = TCB = P BC ( XVI . , 4 ) ; and ( 5 ) ON : ND :: BC ...
Página 67
... Suppose the P. C. to have fallen at a stake 2.50 . In order to find the length of the curve , divide the intersection angle by the degree of curva- ture , having first re- duced the minutes in each to decimals of a degree by multiplying ...
... Suppose the P. C. to have fallen at a stake 2.50 . In order to find the length of the curve , divide the intersection angle by the degree of curva- ture , having first re- duced the minutes in each to decimals of a degree by multiplying ...
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