U

Ugliness of bridges, 1155

Ultimate strength, 265

Unclassified work, 1484, 1878, 1884

bills of, 1482

Underpinning, 1530

Uniform loads, plate girder spans,

lengths of cover-plates, 443

moments, shears, and reactions, 42, 414

Union Bridge and Construction Company, 1072, 1513

Unit prices of materials, 1354, 1355, 1359, 1360

Unit reaction method of computing live-load stresses, 169

Unit stresses, 255, 1654, 1657. See also Tables for Designing.

columns, 322

forked ends or jaw plates, 323

machinery, 1709-1712

pins, bearing, and bending, 323, 324

rivets, bearing and shear, 325

timber, 1046, 1047

weights of materials, 1649

United States Army Engineers' hearings, 1142

United States Government requirements for bridging navigable waters, 1137

United States map showing the annual rainfall and record run-offs, 1115

United States Steel Corporation, 76

Universal mill plates, straightness of, 1425

Unnecessary rivets, 503

Unsupported lengths of columns, 960

Unsupported lengths of plate-girder flanges, 431

Uplift loads, 97, 1650

Upper lateral systems, 405

Use of piles for foundations, 969