| Unprotected concrete piers | 310 | |
| Unsatisfactory conditions of existing elevated railroads, reasons for | 24 | |
| Unsupported widths of plates in compression | 174 | |
| Uplift for highway draw-spans, assumed | 239 | |
| Uplift loads for draw-spans | 184 | |
| Upward dead-load reactions in draw-spans | 122 | |
| Use of cast-iron trimmings for decoration | 52 | |
| Use of dynamite in pier-sinking | 303 | |
| Use of high steel | 8 | |
| Use of judgment in designing | 15 | |
| Use of labor-saving devices | 13 | |
| Use of powder in quarrying | 297 | |
| Use of slide-rule | 333 | |
| Use of superfluous metal | 17 | |
| Use of supplementary angles for open-webbed, riveted girders | 27 | |
| Use of water-jet in pile-driving | 314 | |
| Vain efforts of engineers to compromise with grace by ornamentation | 41 | |
| Value of faculty of judgment | 14 | |
| Van Buren Street Bascule Bridge, Chicago | 106 | |
| Variation in cost of piers with span length | 35 | |
| Variation in weight | 251 | |
| Variation of truss-weight with span-length | 35 | |
| Variation of weight of lateral system with span-length | 35 | |
| Variation of weight of metal with length of opening in cantilever bridges | 76 | |
| Various types of arches | 80 | |
| Vertical posts, sections of | 171 | |
| Vertical sway-bracing | 219 | |
| Viaducts | 86 | |
| Viaducts, economic layouts of | 87 | |
| Viaducts, ornamentation of | 52 | |
| Violation of principles in designing | 4 | 5 |
| Washers, specifications for | 258 | |
| Washing drawings with benzine | 346 | |
| Waste of money in designing | 5 | |
| Water-jet, use of, in pile-driving | 314 | |
| Water-power for operating draw-spans | 120 | |
| Wearing-floors | 215 | |
| Web members of open-webbed; riveted girders, sectional areas for | 27 | |
| Web-plates at ends of open-webbed, riveted girders | 169 | |
| Webs of drums | 193 | |
| Webs of girders for elevated railroads | 94 | |