| Reinforcing-plates at pinholes | 14 | |
| Rejection of material | 202 | |
| Relations between principal dimensions of arches | 84 | |
| Relations between various leading dimensions in cantilever bridges | 77 | |
| Removal of pipes and sewers | 291 | |
| Removal of surplus material | 291 | |
| Repairing bridges | 139 | |
| Reports of timber inspectors | 299 | |
| Re-railing apparatus | 142 | |
| Resistance to overturning of piers | 307 | |
| Responsibility for accidents | 263 | |
| Resting longitudinal girders on cross-girders | 98 | 180 |
| Reversibility of draw-spans | 207 | |
| Reversing-stresses | 157 | |
| Reversion of stresses in bottom chords | 32 | |
| Revolving drawbridges | 119 | |
| Rigid bottom chords in highway bridges | 220 | |
| Rigidity, importance of | 15 | 16 |
| Rigidity of architects' ideals | 42 | |
| Rigid lateral bracing for railroad truss-bridges | 147 | |
| Rigid lateral systems | 24 | |
| Rigid sway-bracing for cantilever bridges | 5 | |
| Rigid top chords for draw-spans | 183 | 191 |
| Rim-bearing versus centre-bearing turntables | 123 | |
| Rising ends of draw-spans | 126 | 209 |
| Rivet-heads | 255 | |
| Rivet-holes | 255 | |
| Riveting | 164 | |
| Riveting in highway bridges | 227 | |
| Riveting, necessity for symmetry in | 22 | |
| Rivets | 255 | |
| Rivets in direct tension | 25 | |
| Road roller | 222 | 223 |
| Rolled steel | 245 | |
| Roller boxes | 177 | |
| Roller plates | 177 | |
| Rollers | 177 | |
| Rollers for draw-spans | 195 | |
| Rollers for draw-spans, tests of | 253 | |
| Rollers of Halsted Street Lift-Bridge | 110 | |
| Rollers, specifications for | 259 | |
| Roof-trusses | 331 | |
| Roof-trusses, cantilevers for | 57 | |
| Roof-trusses, economy in | 57 | |
| Rust-cement | 194 | |