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Reinforced Concrete Handbook

Engineering Applications and Design
Civil Engineering Design and Engineering

Reinforced Concrete Handbook, for Engineers, Architects, and Contractors

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Reinforced Concrete Handbook, for Engineers, Architects, and Contractors


In preparing this volume, I have endeavored to produce a reference handbook that would be par- ticularly adapted to the wants of architects, engineers, and contractors. Appreciating the value of a reference book to a designer in any of these branches, and especially when business methods and competition demand an economy of time, such a choice in preference to a text-book, re- sulted. All clue care has been exercised to avoid conflicts with data compiled in the many valuable text-books on the subject.

It was purposed to produce a work treating upon a general form of design rather than upon any one particular or patented system, but to which any of the latter may be applied. The treatment of the many phases entering the de- sign has been carried out along well-known for- mulae based upon the theory of elasticity, but modified by the usual assumptions, such as the "conservation of planes" and "Hookes' Law," and not upon empirical formula? based upon ex- periments. Attention should be called to the fact that before applying the theory of elasticity to any particular part of the design, a sufficient number of tests were carried out along this basis to approve it, and determine the coefficients and constants.

The book is divided into four parts: Part I gives a general but concise resume of the subject from a practical standpoint, bringing out some of the difficulties met with in practice, and suggest- ing remedies. Under Part II is compiled a series of tests justifying the use of various constants and coefficients in preparing the tables under Part III, as well as bearing out the theory of elasticity. Part III contains a series of tables from which it is hoped the designer may obtain all necessary information to meet the more common cases in practice. It was not intended to cover the more intricate designs, as this is a feature that requires considerable thought and time, both of which may be profitably applied. Part IV treats of the de- sign of trussed roofs from a practical standpoint.

Finally, if this volume will* tend to do away with the use of some of the "empirical formulae" and "rule of thumb' 7 methods of designing rein- forced concrete structures, and tend to concen- trate all toward a standard and universal system, as well as remove some of the prejudicial influ- ences at work tending to demerit its worth be- cause of unfamiliarity with its design, it will have accomplished its purpose in the mind of the writer.



Tensile Strength of Cement . 13
Classification of Trap-rock Sizes . 19
Caring for Crushed Stone upon the Works 19
Sand 22
Proportion of Ingredients for the Various Mixes ... 22
Incorporation 26
Protecting Newly-laid Work 32


Tensile Strength of Concrete-Steel 37
Test of Beam No. 1 40
Test Beam No. 2 43
Cut Showing Failure of Beam No. 1 45
Cut Showing Failure of Beam No. 2 45
Remarks Concerning Tests No. 1 and No. 2 46
Cut Showing Arrangement of Apparatus for Conducting Tests No. 1 and No. 2 ,.-.. 47
Floor Tests Nos. 1-13 49-57
Results of Floor Tests Nos. 1-13 58-59
Remarks Concerning Floor Tests 60
Floor Tests Nos. 86 and 14 61-62
Roof Test No. 22 63
Remarks upon Plots Showing the Relationship between Expansion and Temperature 64
Plot Showing Expansion in Fifty Feet 65
Plot Showing Expansion hi Thirty Feet 67
Conclusions 68 Combined Plot Showing Expansion in Ten Feet ... 69


Description of Table I 75
Tables Giving Safe Bending Moments for Different Sizes of Beams or Girders, Called Table I 82-94
Description of Tables la and 16 95-97
Tables Giving Safe Bending Moments for Different Sizes of Continuous Girders (with Two Spans), Called Table la 98-105
Key to Using Tables I, la, 16, and II ....... 106
Tables Giving Safe Bending Moments for Different Sizes of Continuous Girders (with Three or More Spans), Called Table* 16 107-114
Description of Table II 115-116
Tables Giving Safe Loading for Different Spans, Called Table II 117-128
Description of Table III 129-137
Tables Giving Safe Shearing Forces for Different Sizes of Beams or Girders, Called Table III 138-144
Description of Table IV 145-146
Tables Giving Safe Spans for Different Sizes of Beams or Girders, Allowing a Safe Deflection of 3 ^Q of Span, Called Table IV 147-149
Description of Table V 150 Table Giving Safe Bending Moments for Different Thicknesses of Floors, Called Table V 152
Description of Table Va 153 Table Giving Amount of Steel to Resist Various Temperature Changes in Floors, Called Table Va . 154
Description of Table VI 155
Table Giving Safe Loadings and Spans for Different Thicknesses of Floors, Called Table VI 157-165
Description of Table VII 166
Tables Giving Safe Loads for Different Sizes of Col- umns, Called Table VII 167-169
Description of Table VIII 170
Comparative Costs, Beams for Equal Strength, CaUed Table VIII 172-173
Description of Table IX 174
Comparative Costs, Floors for Equal Strength, Called Table IX 175
Description of Table X 176
Comparative Costs, Floors for Equal Deflection, Called Table X 173
Description of Table XI 177
Comparative Costs, Columns for Equal Strength, Called Table XI 178-1
S3 Cost of Reinforced Concrete Columns, Octagonal Sec- tion, for Different Sizes 184-186
Amounts of Cement, Sand, and Stone Required for Concrete Mixtures of Various Proportions, Called Table XII 187-188
Description of Table XIII ...... 189
Relative Strength of Different Proportions of Mixture, Called Table XIII 190

Trussed Roofs 193-200
Reinforced Concrete Roofs 201-202
Description of Table XIV "... . . . 202
Roof Designs, Called Table XIV . . 203-205
Description of Table XlVa 205
Costs of Roofs, Called Table XlVa 206
Description of Table XV 206
Table XV. Truss Designs 208-213 Description of Table XVa 214
Weights of Trusses. Table XVa . -r-r~-. .... 215-216
Description of Plots . . 217
Plots of Costs. Table XV 218-222
Description of Table XVI 223
Table XVI. Truss Designs 224-230
Description of Table XVIa 231
Weights of Trusses. Table XVIa 232
Plots of Costs. Table XVI 233-237
Description of Table XVII 238
Table XVII. Truss Designs 239-242
Plot of Costs. Table XVII . 243
Description of Table XVIIa 244
Weights of Trusses. Table XVITa 244
Description of Table XVII6 245 Table XVII6.
Truss Designs 246-248 Plots of Costs. Table XVII . 249
Weights of Trusses. Table XVII^ 250
Description of Table XVIIc 251
Table XVIIc. Truss Designs 251-253
Description of Table XV lid 254
Table XVIId. Truss Designs 254-256
General Description of Trusses of Types Treated under Tables XVII-XVIId 257
Description of Table XVIII 258 Plot to Determine Factor K in Formula ....'.. 261
Table XVIII. Truss Designs 262-266
Plot of Costs. Table XVIII 267 Plots Showing Comparative Costs of Different Kinds of Trusses 268-269
Weights of Trusses. Table XVIIIa 270-271

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