— 252 — 
Checking, methods of> 151, 189, 190, 19 只， 
Check nuts, 57, 71. 
Chord bars, 52, 53, 115, 119, 【 31. 
Chord heads, 187. 
Chord jiacking, 76, 119, ‘133, 135, 138, 159, 1^9. 
Chord plates, 7 し 12 o, 158. 
Chord proportioning, J15, 116, 120, 121, 157, 158* 
Chord sections, 52, 69. 
Clear headway, 66. 
Clear roadway, 65. 
Cock er ill, Socictc*, 25. 
Columns, formulae for, 70. 
Coinpari 8011 between American and English 
bridges, 2, 4, 5, 8. 
Complete design for a bridge, 155. 
Compressive stresses, 70. Tables VIIT & IX. 
Connecting plates, 54, 72, 73, 140, 168, 169, 
1 7c, 204. 
Connecting plates for cliannols, sizes of, 204. 
Connection for lateral systems, 55. 
Construction of chord heads, 187. 
Continuous floor system, 52, 57. 
Continuous spans, 67. 
Cost, estimates of, 151. 
Cost of blacksmithing, 1:2. 
Cost of bridges, 153. 
Cost of erection, 152. 
Cost of falsework, j 5 r, 153, 
Cost of framing, 151. 
Cost of hauling, 151. 
Cost of iron, 9, 151. 
Cost of lumber, 152. 
Cost of painting, 152. 
Coit of pile driving, 154. 
Counters, 53, 93, u6. 
Countersunk rivets, 114, 190. 
Coyer plates, 53, 73, 14c, 172, 205. 
Criticism of present Japanese bridges, 5. 
Curvature stresses in lateral systems, 65, 105. 
Curvature stresses in portal bracing, 108. 
Curvature stresses in trusses, 86, 88, 89, 102. 
Curvature stresses in vertical sway bracing, 
108 • 
Cutting off flanges of channels, 53, 77, 141. 
Dapping, 60. 
Data, table or list of, 9 1 ， J 53 , J 55 . 
Day’s work for men and animals, 151. 
Dead load, 64, 82, 83. Table I. 
Dead load stresses, 93. 
Deck bridges, 8, $7, 57. 89, 94.- 
Decimals of an inch fur each 在を 1 . l 1 96. 
De Lccuw and Phillipsen, 29. 
Depths of beams, economic, 122, 124 
Depths of trusses, economic, >45. Table I. 
Derailment, 7, 60. 
Design for a bridge, 155. 
Design for a track stringer, 126. 
Details, proportioning of, 1 39, 167, 203. 
Diagonal bracing for plate girder spans, 5 7 ^* 
Diagonals, lengths of, 1 86. 
Biiigrams of stresses, 92, 156, 160, 161. Plates 
XCII — XLII. 
Diameters of rivets, 72, 74, 113. 
Different kinds of floor system, 56, 57. 
Different styles of bridges troatea, 51. 
Dimensions, marking of, 189, 197, 200. 
Direct wind pressure stresses , 86, 100. 
Disposition of material in flanges and chords, 
S3- 
Ditching apparatus, 6 r. 
Doable intersection bridges, 5 2, 66, 91, 96, 147 * 
Plate I. 
Double nut connection for lateral struts, 55 * 
Double track bridges, 144, •24-2. 
Double track bridges, weights of, 83, 242. 
Draughtsman’s equipment, 182. 
Draughtsmen, hints to, 189. 
Drawings, working, 18-2. 
Dunk eric ley & Co., 16. 
Earl of Dudley’s Round Oak Ironworks, 21 » 
Economic depths, 122, 124, 145. Table I* 
Economy, 145* 
Economy of Pratt and Whipple trusses, 8 ， 
Effect of brakes on bottom chords, 236. 
Effect of wind pressure on members, 64, 67, 
69, 84, 86, 88. 
Elongation of -pin holes in bottom chord struts’ 
116. 
End lower lateral struts^ 69, 105, 161. 
Engines, Japanese, 8r. 
Engine, standard, 63.81. 
Equipment, draughtsman’s, 182. 
Equipment for raising gang, 223. 
Equivalent lengths for heads, nuts &c. , 149 * 
Equivalent uniformly distributed loads, 63, 名 2 . 
Erecting bills, 229. 
Erecting bridges, method of, 221, 23c. 
Erecting gang, 221. 
Erection, 22 r. 
Estimates of cost, 151. 
Excess, engine, 82, 86, 98. 
Expansion, 55, 66. 
