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 ...D. Van Nostrand Company, 1890 - 339 páginas |
Dentro del libro
Página 30
... slope of given inclination , beginning at the side of the road - bed , must needs intersect the ground surface . Formation slopes are usually stated in parts horizontal to one part vertical . Thus a slope of 45 ° is " 1 to 1. " A slope ...
... slope of given inclination , beginning at the side of the road - bed , must needs intersect the ground surface . Formation slopes are usually stated in parts horizontal to one part vertical . Thus a slope of 45 ° is " 1 to 1. " A slope ...
Página 31
... slope , and to ascertain its 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 ...
... slope , and to ascertain its 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 ...
Página 32
... slope must meet the ground . - = 9. Suppose him , by either method , or even by random guess , to think that 10 feet for half the road - bed , and 10 more for the slope , looks about right . The formation slope being 1 to 1 , this ...
... slope must meet the ground . - = 9. Suppose him , by either method , or even by random guess , to think that 10 feet for half the road - bed , and 10 more for the slope , looks about right . The formation slope being 1 to 1 , this ...
Página 33
... slope stake on the second or third trial , without conscious effort of mind . 11. Next , suppose the level at B , 25.5 feet above grade , com- manding the upper slope . 25.5 - = Note the change of ground 11 feet out , and take a rod ...
... slope stake on the second or third trial , without conscious effort of mind . 11. Next , suppose the level at B , 25.5 feet above grade , com- manding the upper slope . 25.5 - = Note the change of ground 11 feet out , and take a rod ...
Página 34
... slopes will meet 30 feet out . Of this distance , 7 feet are due to half the road - bed , and 23 feet to horizontal reach of the embankment slope . The slope being 14 to 1 , or 2 , the hori- zontal reach of 23 feet corresponds to a ...
... slopes will meet 30 feet out . Of this distance , 7 feet are due to half the road - bed , and 23 feet to horizontal reach of the embankment slope . The slope being 14 to 1 , or 2 , the hori- zontal reach of 23 feet corresponds to a ...
Términos y frases comunes
A. D. MIN adjustment apex distance backsight called capstan central angle chord A C column Cosine 1 Sine cross-hair Cube Roots decimal deflection distance degree of curvature degree of curve divided engineer equal error Example feet figure fixed foregoing formation slope frog angle gauge of track gauge side ground Hence inches index angle instrument height intersection angle located logarithm M.
M. Sine Main frog dist mantissa mark measure method metres middle ordinate minutes multiplied natural sine number corresponding observation opposite outer rail parallel perpendicular plane triangle Polaris quotient radii radius range REVERSED CURVE rule Sine 1 Cotang Square Roots sub-chord subtended Subtract Suppose switch-rail Table XVI tabular tance Tang tangential angle tangential distance telescope terminal tangent tion toe of switch Trigonometry turnout curve 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...