| Checking shipping weights | 286 | |
| Checking shop-drawings | 343 | |
| Choice of colors in painting bridges | 53 | |
| Chord packing | 176 | |
| Circulars to railroad engineers | 266 | |
| Classes of combined bridges | 134 | |
| Classification of highway bridges | 213 | |
| Classification of piers | 304 | |
| Cleaning metal-work | 260 | |
| Clearance for elevated railroads | 102 | |
| Clearance for highway bridges | 217 | |
| Clearance in packing, provision for | 24 | |
| Clearances in railroad bridges | 144 | |
| Clearances over waterways | 328 | |
| Clearing away rubbish, etc., for trestles | 276 | |
| Closed floors for elevated railroads | 92 | |
| Closing thoroughfares | 262 | |
| Coefficient of expansion | 318 | 319 |
| Coffer-dams | 301 | 302 |
| Coincidence of stress and gravity lines | 21 | |
| Collapsing bucket, use of | 293 | |
| Collapsing of steel cylinders in sinking | 291 | |
| Collars for shafting | 205 | |
| Colors for paints | 260 | |
| Column feet, elevation of | 27 | |
| Column feet, expansion for | 89 | 90 |
| Column feet, filling of | 27 | |
| Column feet, protecting | 291 | |
| Columns acting as beams | 26 | |
| Columns, best sections for | 90 | |
| Columns for elevated railroads | 178 | |
| Columns for trestles, batter for | 87 | |
| Columns, splices in | 90 | |
| Column tops in trestles and elevated railroads | 26 | |
| Combination Bridge Co.'s Sioux City Bridge | 135 | |
| Combinations of loads for draw-spans | 186 | |
| Combinations of stresses for plate-girder draw-spans | 188 | 189 |
| Combinations of stresses in cantilever bridges | 60 | |
| Combinations of stresses in highway bridges | 225 | |
| Combinations of stresses in railroad bridges | 158 | |
| Combinations of stresses in railroad trestles | 158 | |
| Combinations of stresses in trestle columns | 88 | |
| Combinations of stresses, recording | 334 | |
| Combined bridges | 133 | |
| Comparative economy of arches and simple truss spans | 82 | |
| Comparative importance of live and dead loads | 7 | |