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Handbook

A CONVENIENT REFERENCE BOOK

For

Chainmen, Rodmen, Transitmen, Levelers,
Surveyors, as well as Draftsmen, Com-
puters, and Railroad, Municipal, and
Hydraulic Engineers

BY

International Correspondence Schools

SCRANTON, PA.

1st Edition, ggd Thousand, Sd Impression

Scranton, Pa.
International Textbook Company

Copyright, 1913, By
International Textbook Company
Copyright In Great Britain-
All Rights Reserved

General Library System

VoTgpity °f Wisconsin - Madison
7do State Street

Madison, WI 53706-1494
U.S.A.

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.71

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PREFACE

In this little volume the publishers are offering to all who are interested a compact collection of principles, methods, formulas, and tables pertaining to the different branches of civil engineering. It is intended as a ready reference manual for the student as well as for the technical man engaged in practical work. For this reason, whenever there was a choice of rules or methods, only the simplest and those best suited to practical use were selected. For the same reason, wherever possible, examples such as would occur in practice have been given, together with their solutions, thus illustrating the different steps and processes to be performed in order to obtain practical results.

Attention is called to the tables, which are very numerous. Many of these can be found elsewhere only in special works, and many are original, being found only in this book. Of the latter kind, are the Hydraulic Tables, giving the discharge, velocity, and head per unit of length for cast-iron pipes from 4 to 72 inches in diameter; and the Reinforced-Concrete Tables, by

iii

[graphic]

means of which rapid computation of unit stresses in reinforced-concrete beams can be made for any combination of steel and concrete.

This handbook was prepared by Mr. C. K. Smoley, Principal of the School of Civil Engineering of the International Correspondence Schools.

International Correspondence Schools April, 1913

INDEX

A

Absorptive power of stone,

Table of, 304
Accuracy in leveling, 88

of angle measurements, 65
Adjustment of sextant, 128

of wye level, 76
Adjustments of compass, 33

of dumpy level, 79

of transit, 44
Aggregate, Definition of, 312
Aggregates for concrete, 313
Agonic lines, 38
Altitude, Correction for, 152

of a star, 140

Table of sun's parallax in,
152

Angle bars, and bolts per mile
of track. Table of num-
ber of rails, pairs of, 236
measurements, Accuracy

of, 65
of friction, 271
of intersection, 159
of repose, 271
Angles of friction for miscel-
laneous materials. Table
of coefficients and, 273
of repose and weights of
earths, Table of coeffi-
cients of friction and, 273
of repose for masonry mate-
rials. Table of coefficients
of friction and, 272
or arcs. Measures of, 2
Platting, 119
Angular bends, Table of co-
efficients for, 362.
surveying, 33.
surveying. Definition of, 26
Apparent day, 141
Archimedes, Principle of, 346
Arcs, Measures of angles or, 2
Asphalt pavements, 406

Astronomical time, 142
Astronomy, Practical, 138
Atmospheric pressure, 346
Avoirdupois weight, 3
Azimuth, Corrections for ob-
servations of the sun for,
154
of a star, 140

of the sun, Formula for, 150
traverse, Field notes of, 54
Traversing by, 51
Azimuths of Polaris at elonga-
tion, Table of, 148
B

Backsights and foresights,

Balancing, M.
Balancing the survey of a

closed field, 61
Barometric leveling, 91

table, 92
Beam, Stiffness of, 295
Beams, 287

Designing of, 293
Formula for deflection of,
296

Formulas for bending mo-
ments of, 291

Formulas for maximum
shear of, 291
Bearing, Magnrc'.c, 35

True, 38

values of rivets, 281, 282
Bending moment, Definition
of, 289

moments of beams. For-
mulas for, 291
Bitulithic pavement, 408
Bituminous macadam roads,
399

Bolts in a keg, Number of
track, 237
per mile of track. Table of
number of rails, pairs of
angle bars, and, 236

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