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 ... |
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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 , ană 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 , ană 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 ...
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Términos y frases comunes
4º curve A. D. Min added adjustment angle base called central angle centre CHORD column correct corresponding Cosine Cotang Cube curve decimal deflection degree of curvature difference direction dist distance divided elevation engineer equal error Example feet field figure fixed follows frog functions gauge given gives grade ground half height Hence inches intersection length located logarithm mark means measure method middle minutes Move multiplied natural observation opposite outer parallel practice quotient radii radius rail range record reference remaining 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 Ιο
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 - Every circumference of a. circle, whether the circle be large or small, is supposed to be divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.
Página 11 - ... plane triangles. In every plane triangle there are six parts, — three sides and three angles. When three of these parts are given, one being a side, the remaining parts may be found by computation. The operation of finding the unknown parts is called the solution of the triangle.
Página 19 - Call the word written upon each side the name of each side ; then say, As the name of the given side, Is to the given side ; So is the name of the required side, To the required side.
Página 3 - 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 195 - NB The minutes in the left-hand column of each page, increasing downwards, belong to the degrees at the top ; and those increasing upwards, in the right-hand column, belong to the degrees below.
Página i - SHUNK, WF 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 Narrow Gauge, and prepared with special reference to the wants of the young.
Página 19 - To find an angle. Assume one side to be radius, and mark the remaining sides as before. Then say, As the side made radius is to radius, So is the other given side to the name of that side; Which determines the opposite angle.
Página 13 - 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...
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 | 14 |
| Editor | D. Van Nostrand Company, 1890 |
| Procedencia del original | Universidad de California |
| Digitalizado | 30 Nov. 2006 |
| Largo | 339 páginas |
| Exportar cita | BiBTeX EndNote RefMan |