| Travellers for trestles | 87 | |
| Treated timber for elevated railroads | 93 | |
| Treatise on redundant members | 19 | |
| Trémie, use of | 293 | |
| Trestle-bracing, wooden | 276 | |
| Trestle columns, batter for | 87 | |
| Trestle columns, combination of stresses in | 88 | |
| Trestle columns, details for | 87 | |
| Trestles | 86 | |
| Trestles, details for | 87 | |
| Trestles, economy in | 36 | 84 |
| Trestle-tower bracing | 179 | |
| Trestle-towers | 148 | |
| Trestle-towers, bracing for | 89 | |
| Trestle-towers for highway structures | 220 | |
| Trestle-work, inspection of | 293 | |
| Triangulation | 317 | |
| Triangulation-hubs | 320 | |
| Triangulation-sheets | 325 | |
| Triangulation to pier-points | 325 | |
| Trimming channel-ends | 176 | |
| Trimming designs | 2 | |
| Trimming idle corners | 254 | |
| True economy in design | 30 | |
| True economy, necessity for | 15 | |
| Truss depths, economic | 30 | |
| Tress depths for draw-spans | 183 | |
| Trusses, weights per foot of | 329 | 330 |
| Trusses with parallel chords, economy in | 31 | |
| Trusses with polygonal top chords, economic depth of | 32 | |
| Tubes, filing | 345 | |
| Turnbuckles, specifications for | 258 | |
| Turned bolts for turntables | 193 | |
| Turned bolts, specifications for | 258 | |
| Turntables, details of | 192 | |
| Turntables of draw-spans, proportioning of | 128 | |
| Twist-drills | 256 | |
| Two-angle struts | 171 | |
| Two-rivet connections, objections to | 25 | |
| Types of arches | 80 | |
| Ultimate tensile strength | 247 | |
| Unbalanced wind-pressure on draws | 202 | |
| Uniform sizes of drawings | 335 | |
| Unit weights of materials | 152 | |
| Unit working pressure on screw-threads | 208 | |
| Unnecessary cantilever bridges | 55 | 56 |