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386 INDEX A B C D E F G H I J K L M N O P Q R S T U V W XYZ Guard-timbers 142 Guide-chairs for rail-lifts 209 Guiding caissons and cylinders in sinking 292 Half-through plate-girder spans 168 Halsted Street Lift-Bridge at Chicago 108 Hand-operating machinery 206 Hand-operating machinery, necessity for 202 Hand-rails for highway bridges 215 216 Hand-rails, ornamental 52 Hand turning-machinery, formulae for 203 Harlem River bascule bridge at New York 107 Harshness of outlines of truss-bridges 42 Heads of eye-bars 178 High steel, use of 8 141 182 244 Highway-bridge failures 130 131 Highway bridges 130 Highway-bridge lettings 2 Highway bridges, classification of 213 Hinged ends for columns 90 179 Hinges for arches 84 Hip verticals for highway bridges 220 Hip verticals for railroad bridges 148 Holes in timber for trestles 279 Horizontal bending on cross-girders of elevated railroads 98 Horizontal sway-bracing in trestle-towers 89 Houses for machinery of draw-spans 211 Howe's Treatise on Arches 81 82 Hubs, triangulation 320 Hydraulic buffers for Halsted Street Lift-Bridge 109 Ice breaks for piers 308 Identification of metal 246 Ignoring bending in columns of elevated railroads 100 Imaginary superiority of cantilever bridges 55 Impact 6 Impact allowance for highway loads 224 Impact allowance for railroad loads 152 223 Impact for cantilever bridges 61 Impact for highway bridges 8 132 Impact method, importance of 7 Impact-stresses, method of finding 333 Importance of chapter on First Principles 12 Importance of impact method 7 Importance of rigidity 15 16 Importance of scientific detailing 139 Improvement in highway-bridge building 131

 

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The University of Iowa Lichtenberger Engineering Library