The Field Engineer: A Handy Book of Practice in the Survey, Location, and Track-work of Railroads; Containing a Large Collection of Rules and Tables, Original and Selected Applicable to Both the Standard and the Narrow Gauge ... |
Dentro del libro
Resultados 1-5 de 34
Página 30
Formation slopes are usually stated in parts horizontal to one part vertical . Thus
a slope of 45° is “ 1 to 1 . ” A slope of “ 2 to 1 ” has a horizontal reach of two feet to
each foot vertical . The carriages of a stairway with twelve - inch treads and ...
Formation slopes are usually stated in parts horizontal to one part vertical . Thus
a slope of 45° is “ 1 to 1 . ” A slope of “ 2 to 1 ” has a horizontal reach of two feet to
each foot vertical . The carriages of a stairway with twelve - inch treads and ...
Página 39
With profile paper at hand , a convenient and quite suf ficient determination of the
grade elevations on a vertical " curve may be made by drawing the gradients to a
scale of 2 feet to an inch vertical , and 50 feet to an inch horizontal . By means ...
With profile paper at hand , a convenient and quite suf ficient determination of the
grade elevations on a vertical " curve may be made by drawing the gradients to a
scale of 2 feet to an inch vertical , and 50 feet to an inch horizontal . By means ...
Página 44
Lay the north half flat on a smooth , hard surface , and with gentle pressure draw
the south pole of a common magnet over it , from the centre outwards ,
withdrawing the magnet from it six or eight inches after each pass . Repeat ten or
a dozen ...
Lay the north half flat on a smooth , hard surface , and with gentle pressure draw
the south pole of a common magnet over it , from the centre outwards ,
withdrawing the magnet from it six or eight inches after each pass . Repeat ten or
a dozen ...
Página 80
On preliminary surveys , the axe should be little used ; and on alternative
locations , or such as may be subject to revision , trees over four inches in
diameter need rarely be felled . He should be patient with sensitive landholders .
He will find ...
On preliminary surveys , the axe should be little used ; and on alternative
locations , or such as may be subject to revision , trees over four inches in
diameter need rarely be felled . He should be patient with sensitive landholders .
He will find ...
Página 81
For such service , carry habitually a slip of profile paper , say six inches wide and
two feet long . Rule the proposed gradeline on it , assume a summit cut , mark the
stations , and start down . When at fault , the elevation can be spotted on the ...
For such service , carry habitually a slip of profile paper , say six inches wide and
two feet long . Rule the proposed gradeline on it , assume a summit cut , mark the
stations , and start down . When at fault , the elevation can be spotted on the ...
Comentarios de la gente - Escribir un comentario
No encontramos ningún comentario en los lugares habituales.
Términos y frases comunes
4º curve A. D. Min added adjustment angle base called central angle centre CHORD circle column corresponding Cosine Cotang Cube curve decimal deflection degree of curvature difference direction dist distance divided elevation engineer equal equivalent error Example feet field figure fixed follows foot frog functions gauge given gives grade ground half height Hence inches intersection length located logarithm mark means measure method metres middle mile minutes Move multiply natural observation opposite parallel practice quotient radii radius range reference remaining result Roots rule screws side Sine slope square stake straight subtract Suppose switch-rail Table Table XVI tabular taken Tang tangent telescope terminal tion track triangle turn turnout vernier vertical
Pasajes populares
Página 2 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 2 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers. log» MN = log» M + log
Página 11 - If the arc, or angle, is less than 45°, look for the degrees at the top of the page, and for the minutes in the...
Página 15 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 1 - THE LOGARITHM: of a number is the exponent of the power to which it is necessary to raise a fixed number, to produce the given number.
Página 13 - Is to the sum of the other two sides, So is the difference of those sides To the difference of the segments of the base.
Página 13 - AC, (Fig. 25.) is to their difference ; as the tangent of half the sum of the angles ACB and ABC, to the tangent of half their difference.
Página 11 - If the angle is greater than 45°, look for the degrees at the bottom of the page, and for the minutes in the right-hand column ; then follow the corresponding...
Página 13 - In any plane triangle, as twice the rectangle under any two sides is to the difference of the sum of the squares of those two sides and the square of the base, so is the radius to the cosine of the angle contained by the two sides.
Página 9 - The operation of finding the unknown parts is called the solution of the triangle. 2. A plane angle is measured by the arc of a circle included between its sides; the centre of the circle being at the vertex, and its radius being 1. The circle, for convenience, is divided into 360 equal parts called degrees; 90 of these parts are included in a quadrant, which includes one-quarter of the circle, and is the measure of a right angle. Each degree is further divided into 00 equal parts called minutes,...
Información bibliográfica
| Título | The Field Engineer: A Handy Book of Practice in the Survey, Location, and Track-work of Railroads; Containing a Large Collection of Rules and Tables, Original and Selected Applicable to Both the Standard and the Narrow Gauge ... |
| Autor | William Findlay Shunk |
| Edición | 16 |
| Editor | D. Van Nostrand Company, 1908 |
| Procedencia del original | Universidad de Michigan |
| Digitalizado | 9 Ago. 2006 |
| Largo | 345 páginas |
| Exportar cita | BiBTeX EndNote RefMan |