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J.A.L. Waddell — INDEX — Bridge Engineering |

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## A"A" truss (Waddell's), 477, 478 Aberthaw Construction Company, 947 Abrams, Duff A., 795 Abrasion of concrete, 1024 Abutment piers, 942 Abutments, 1030 arch, quantities in, 1337-1341 bases, pressures on, 1030, 1031 designing of, 1031 materials for, 1031 piles for, 1042 position of, 1856 proportioning of, for artistic effect, 1179 quantities for, 1300, 1312 skew bridges, 354 types of, 1030 wing, volumes of, 1314-1317 Accessibility to paint brush, 277 Accidents, responsibility for, 1765 Accompanying drawings, 1758 Accretions, 1061 Accuracy of calculations, 1377 Acid open-hearth steel, 46 Adds, River arch at Trezzo, Italy, 11 Adherence to specifications in bidding, 1869 Adjustable rods, 388 Adjustment of shoes on masonry, 459, 460 Adjustment of track for curvature, 138 Administration of construction, 1582 Administration work, 1586 Advantages and disadvantages, bascule bridges, 701 concrete piers, 1023 pneumatic process, 998 Advice to contractor, 1470, 1471 Aerial ferries, 671 AEsthetics, 16, 1150-1181 foundation of, 1150 hindrances to, 1170 layout, effect on, 1216 layouts for determination of, 1173 reinforced-concrete bridges, 943 Agents, 1562 Ahwillgate Indian Bridge, B. C., 4, 5 Air gun, 769 Moran 1006 Akano River (Japan) Bridges, 574 Aligning of handrails, 384 Alignment, 1212, 1765 Allowable pressures, shallow foundations, 966 Allowance for possible error of final position, 987 Alloy steels, 57-93 maximum strength of, 58 rivets, 84 weights of bridges of, 1284, 1286 Alteration in contracts, 1885 Alteration of plans, 1762 Alternating-current electric motors, 1793, 1794 Alternating stresses, 255 Aluminum Company of America, 90 Aluminum in steel, 86 Aluminum steel, 82 Ambiguity in stiffening trusses, 659 American and European practice compared, 1181 American bridge designing, evolution of, 29 American bridge engineering, development of, 19 American Railway Engineering Association, 30 conclusions concerning waterways, 1110, 1111 system of bridge inspection, 1514, 1515 tests on impact, 123 American Society for Testing Materials, 31 American Society of Civil Engineers, 31 American Society of Municipal Improvements, 460 American Steel and Wire Company, 77 American Vanadium Company, of Pittsburgh, 82 Amusement casino for Havana Harbor Bridge, 1077 Analysis of stresses, origin of, 15 Analytic method of stress computation, 158, 159 computing stresses in trusses with polygonal chords, 159 Anchor arms, economic length of, 1199 Anchor bolts, 453, 454, 457, 544, 1053, 1658, 1786 stresses from eccentric loads, 304-309 Anchor, mushroom, 1062 Anchor span, economic length of, 1200 Anchorages, 275, 1645 cantilever bridges, 579 columns, 278, 1643, 1644 pedestals, 1030 swing spans, 154, 693, 1075, 1693 trestle towers, 210 Anchoring mattresses, 1062 Ancient bridges, materials for, 13 Angle measurements in triangulation, 1456, 1460, 1461 corrections in triangulation work, 1461 Angles, 47 areas, net and gross, 424, 425 centres of gravity, positions of, 424 gauges of, 333 lacing, 286 overrun of, 430 Annealing, 1781 castings, 338 Annual installment required to produce one dollar, 1526 Annual rainfall and record run-offs of the United States, 1115 Anti-creeping devices for rails, 357 Apollodorus, 12 Application of stresses, frequency of, 275 Approaches, 535 artistic, 1178 curved, 1091 curves on, 1212 economics of, 1193 timber trestle, 1866 Approximate quantities of materials, 1871-1874 Approval of bridge plans by War Department obstacles to, 1141 rules for, 1140 Arbitration, 1566, 1587, 1588, 1885 bond guaranteeing to abide by decision of, 1589 examples of, 1588, 1589 Arches, aesthetics of, 617 abutments and piers, calculation of stresses in, 911 quantities in, 1337-1347 steel in, 1344 advantages of, 618 Babylonian, 9 barrels, quantities in, 1333 bracing of, 635 centering, 1502 central hinge for dead load only, 619 centre-line, determination of, 863 centres, forms, staging, runways, and falsework, 1769 Chinese, 9 clay centres for, 1537 combination of stresses in, 635 comparison of various types of, 619 concreting of, 952 corbelled, 7 crescent-shaped, 619 crown hinge for, 646 culverts, 1864 dead loads for, 96 defects in, 1164 deflections of, 842 economics of, 1191 economy of types of, 636 elliptical, 11 equivalent uniform live loads for, 634 erection of, 618 fixed-ended, stresses in, 862 foundations for, 618 framing of, 620 gothic, 11 Great Wall of China, 9 Harlem River, 643 highway bridges, 642 hinges for, 19 hyperbolic curves for, 631 inclined to vertical, 634 lenticular, 620 masonry, 536 longest span, 19 merits of different kinds of, 635 metal, origin of, 27 minimum spacing of, 633 moments of inertia of, 841 open-spandrel, 940 origin of, 7 piers and abutments, calculation of stresses in, 911 designing of, 940 quantities in, 1337-1347 steel in, 1344 quantities in, 1329-1334 railroad bridges, 642 reinforced concrete, 862-910, 940-944 calculation of stresses in, 862-910 approximate methods, 868-880 exact methods, 880-910 centre-line, determination of, 863 designing and detailing of, 940-944
piers and abutments of, calculation of stresses in, 911-918 designing and detailing of, 944 quantities in, 1330-1347 segmental, 11 semi-circular, 10 sewers, Roman, 10 shortening, 864, 871, 881, 882 effects of, 956 position of point of contraflexure for, 870 solid-spandrel, 940 spandrel-braced, 620 temperature stresses in, 212, 872, 883 timber, 617 timber, over the Danube River, 10 train sheds, 618 trussing of webs in, 620 weights of metal in, formulae for, 638 widths of, 637 wind stresses in, 634 Architectural arrangement in engineering work, 270 American bridge practice, 1164 Area moment law, 233 Areas, angles, net and gross, 424, 425 cover plates, 426 plate-girder flanges, 429 waterways, determination of data for, 1109 Arkansas River Bridge at Fort Smith, 728 Army Engineers' hearings, 1142 Arnodin, F., 671 Arroyo Seco Bridge at Pasadena, Cal., 941, 1164 "Artistic Design of Bridges" by Tyrrell, 1179, 1181 Asbestos, 51 Ashtabula bridge disaster, 24, 1541 cement, 1812 filler for brick paving, 1835 pavement, 370, 1809 repairing, 1817 weight of, 95 specifications, 1809 testing, 1809 Asphaltic mastic, 352 Assembling and reaming, 1423, 1434 Assigning or subletting of contract, 1556, 1882 Assigns, 1563 Association of Inspectors, 1414, 1437 Assos Bridge, 6 Assuming responsibilities, 1616 Atchafalaya River borings, 1098 Atchafalaya River swing span, erection of, 993, 1072 "A" truss, 477, 478Attachments for wire ropes, , 1719, 1789 Attendance, regularity of, by employees, 1608 Auger borings, 1093 Austerlitz Bridge (Paris), 627, 628, 1071 Austin, Texas, bridge, 1164 Award of contract, 1881 Axes, gravity, intersection of, 273 |