| Supplementary angles for open-webbed, riveted girders | 27 | |
| Surplus material, removal of | 291 | |
| Suspended span, economic length of | 70 | |
| Suspended spans, connection of | 69 | |
| Suspended spans of cantilever bridges, stresses in | 58 | |
| Suspenders for cantilever bridges | 66 | |
| Suspenders for highway bridges | 220 | |
| Suspenders for railroad bridges | 148 | |
| Suspension bridges, lack of rigidity in | 57 | |
| Suspension bridges, proper locations for | 57 | |
| Sway-bracing for deck-bridges | 219 | |
| Sway-bracing for draw-spans | 191 | |
| Sway-bracing for highway bridges | 219 | |
| Symmetry in layout about a middle plane | 48 | 49 |
| Symmetry in pier designing | 308 | |
| Symmetry in riveting, necessity for | 22 | |
| Symmetry of section, necessity for | 21 | |
| Systemization of cantilever-bridge designing | 57 | |
| Systemization of knowledge | 346 | |
| Systemization of work | 13 | |
| Table of data for various cantilever bridges | 71 | |
| Tape-lines | 318 | |
| Tapered reamers | 256 | |
| Targets | 325 | |
| Temperature, effects of changes in | 155 | |
| Temporary bracing for steel cylinders | 312 | |
| Tenders | 264 | |
| Tensile strength | 247 | |
| Tension on anchor-bolts in trestles | 148 | |
| Testing cement | 295 | |
| Testing foundations | 291 | |
| Testing full-size members | 288 | |
| Testing-machine, speed of | 247 | |
| Testing, methods of | 246 | |
| Testing operating machinery | 289 | |
| Testing paints | 10 | |
| Testing tape-lines | 318 | |
| Test-pieces, annealing of | 247 | |
| Test-pieces, number of | 249 | |
| Tests of angles connected by one leg only | 27 | |
| Tests of full-size eyebars | 250 | |
| Tests of full-size members and details | 253 | |
| Tests of rollers for draw-spans | 253 | |
| Tests of star-struts | 28 | |
| Text-books on substructure | 301 | |
| Thickness of track-segments | 195 | |