| Comparative weight of bridges let by the pound and by lump sum | 2 | |
| Competition in inspection | 282 | |
| Competitive designs, evil effects of | 139 | |
| Competitive plans | 1 | |
| Complete data, necessity for | 18 | |
| Composition of rolled steel | 245 | |
| Compound web-plates | 174 | |
| Compression flanges of plate girders, sections of | 167 | |
| Compression formulae | 156 | |
| Compromise Standard System of Live Loads, etc. | 265 | |
| Concentrated loads for Highway bridges | 222 | 223 |
| Conclusion | 346 | |
| Concrete for anchorages of cantilever bridges | 66 | |
| Concrete, injury to | 293 | |
| Concrete mixing | 293 | |
| Concrete piers | 310 | |
| Concrete piers, forms for | 292 | |
| Concrete, testing materials for | 292 | |
| Connecting-plates for riveted girders | 170 | |
| Connecting web-angles to chords by one leg only | 96 | |
| Connection for shoes at ends of draw-spans | 210 | |
| Connection of columns to masonry | 181 | |
| Connection of suspended spans | 69 | |
| Connections of floor-beams to posts | 148 | |
| Consideration of quality, frequency, and probability of stresses | 22 | |
| Consultation concerning architectural features | 50 | |
| Contempt of engineers for architectural features in designing | 44 | |
| Contents of drawing-sheets | 338 | |
| Contents of stress-diagrams | 336 | |
| Continuity of stringers in railroad bridges | 160 | |
| Continuous spans | 148 | |
| Contraction, provision for | 23 | |
| Convergence of engineering practice and architectural ideals | 47 | 48 |
| Correction for temperature in base-line measurements | 319 | |
| Correctness of impact formulae | 7 | 8 |
| Cost of traveller affected by truss depth | 32 | |
| Counterbracing in highway bridges | 219 | |
| Counters | 171 | |
| Counterweighted bascule bridges | 106 | |
| Counterweights of Halsted Street Lift-Bridge | 108 | |
| Couplings for shaftings | 205 | |
| Cover-plates for plate girders | 167 | |