| Title | ABOUT | CONTENTS | GLOSSARY |
| J.A.L. Waddell — INDEX — Bridge Engineering |
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LLabelye, 12 Labor (daily), limits of, 1756 Labor laws, observance of, 1756 Lachine Bridge, 25, 1072 angle, 286 bars, 339 clearance required between bars or angles, 505 comparison of types, 285-288 design of, 285-292 formula for shear on, 1678 lapping of bars or angles, 331 minimum clearance for painting, 505 shear on, 290 strength of various types, 285-286 truss members, 1678, 1679 weight, 286-288 Lag piles, 1012 LaGrange, 14 Laing, T. E., 717 Lake Shore & Michigan Southern Lift Bridge,South Chicago, 737 Lambot, 18 Lamp-posts, 384, 385, 386, 1843 Landscape, offense to, 1151 Landsdowne Bridge, 594 Language in specifications, 1553 Lapping of lacing bars, 331 designing of, 512-515 Latches for swing-spans, 1718 Laterals and sway bracing, 387-407, 1641, 1642 bottom lateral system, 398 connections of struts, 293 double cancellation for, 390 expansion details, 1067 functions of, 387 highway, plate-girder spans, 396 highway truss spans, 406 plate-girder spans, 392-394 railway deck truss spans, 403 railway through truss spans, 397 rigidity of, 388 riveted connections for, 399 skew spans, 487 solid floors, 388 stresses in, 287 coefficients for chords, 175 stringers, connections to, 399, 400 through plate-girder spans, 394 truss spans, 1675, 1676 Lath for wood-block pavement, 368 Latrobe, Benjamin H., 23 Lattice bridges, 17 Lattice girders, comparison with plate-girders, 411 Lattice truss with polygonal top chord, 468, 476 Latticing, 274 Launching caissons, 999 Launching spans, 1506 longitudinally, 1511, 1512 Launhardt's formula, 255 Laws, labor, observance of, 1756 Law-suits, defense of, 1567 Laying asphalt, 1815 Laying masonry during freezing weather, 1864 Laying out work, 1371 Layout of drawing sheets, 1381 Layouts, 1372 considerations affecting, 1210 aesthetics, 1216 commercial influences, 1213 construction facilities, 1216 economic considerations, 1217 erection considerations, 1216 foundation considerations, 1216 geographical conditions, 1213 maintenance and repairs, 1217 navigation influences, 1216 property considerations, 1213 stream conditions, 1215 time considerations, 1215 U.S. Government requirements, 1137-1146 determination of, 1210 elevated railroads, 1372 general, information on, 1372 selection of, 1088 temporary, for East Omaha Bridge, 1073 trestles, 537 Lead, 51 Leaks, stopping of, 976 Least work, principle of, 214 Lecturing to engineering students, 1622 Leiter, Z. P., 770 Leiter's air-drying salt-water-proof paint, 770 Lengths, cover-plates, 440-444 effective, 1639 reinforced-concrete structures, 960 plate-girders, economic and limiting, 409, 410 procurable, rolled sections, 510 spans, economic, 1187 ties, 361 unsupported, girder flanges, 431 Lettering, 1381 Leucol oil, 770 Levees, effect of, 1122 Leveling of bed rock, 1022 Leveling up of shoes, 460 Levels, 1471, 1730 Levers, hand-operating, 1731 Liability, indemnification against, 1886 Liability insurance for boring party, 1106 Liability, non-waiving of, 1885 Library, 1411 Life of steel bridges, 37 Lift bridges, 717-746 details of design, 1695, 1696 guides for, 1722 gyratory, 669 history of, 717 lifting deck, 728 machinery for, 1727, 1789 operating drums for, 1725 operating ropes for, 1725 power for, 1700 suspending cables for, 1718, 1719 trolleys for, 1707 vertical, 717-746 wind loads for, 155 Lifting deck, 728 Lifts, end, for swing spans, 1717 Light colors for bridge paints, 768 Lights, 1707 indicator for span operation, 1801 service and roadway, 1797 systems, 1842 Lime, 56 Limit switches, 1706, 1797 Limiting depths for open dredging, 996 Limiting lengths of railway plate-girder spans, 409 Limits in designing, 1661, 1662 Limits of daily labor, 1756 Limits of error in structural steel, 1784 Lindenthal, Gustav, 27, 126, 471, 482, 625, 660, 662 Lining-up of rivets, 328 Linseed oil, 767 Liquidated damages, 1564, 1876 List of data required for the proper designing of railroad bridges and trestles, 1082 Listing of jobs, 1410 Little River Lift Bridge, L. & A. Ry. Co., 740 Little Rock Junction Bridge, repairs after substructure failure, 1530, 1542 Live loads, 98-119, 954, 1646-1648, 1687, 1688 double-track bridges, 107 electric-railway bridges, 107, 954 end shears, diagrams of, electric-railway bridges, 109 railway bridges, 104 equivalent, for floor-beams, 168 equivalent, for stringers, 166 equivalent uniform, diagrams of, electric-railway bridges, 110-116 highway bridges, 108, 117, 954, 1647 history of, 98 motor trucks, 118 Railroad Bridges by Hodge, 100 railroad bridges, various loadings, 103 railway bridges, 954, 1646 reduction of, 344 road rollers, 118 specifications of "Bridge Engineering," 103 status in 1907, 102 stresses, unit reaction method of computing, 169 swing bridges, 1687, 1688 testing old bridges, 1518, 1519 Load area, definition of, 857 Loading-girders for swing spans, 1692 Loading metalwork on cars and shipping, 1766 Loading metalwork on vessel and preparing same therefor, 1766 Loads, base slabs of counterforted retaining walls, 1039 counterforts of counterforted retaining walls, 1041 dead. See Dead Loads. highway bridges, 1645. See also Live Loads. live. See Live Loads. machinery of movable spans, 1709 piers, pedestals, and abutments, 1045 piles, 1047 power equipment of movable spans, 1697 railway bridges, 954, 1645 reinforced-concrete bridges, 954-957 swing spans, 1687, 1688, 1689 traction, 149, 156, 157, 956, 1653 transferred, 1652 uplift, 97, 1650 wind, 149, 1651, 1652 Locating of bridges, 1088 Location, 1742 air locks, 1005 borings, 1101, 1106 piers, 1471 triangulation, 1464 splices, 508 Locking apparatus, 1791 Lockport, Ill., Bridge, 32 Locks, movable spans, 1724 rails, 1724 Locomotives, Mallet, 34 Log cribs, 974 Logs in caissons, 995 London Bridge, 12 Long, 15 Long, E. McLean, 1412 instructions to inspectors, 1419-1424 Long Lake Highway Bridge, 603 Long-leaf yellow pine, 52 Long panels, 1176 Long-span American bridges, origin of, 24 Long truss, 20 Longitudinal launching, 1511, 1512 Longitudinal shear in timber, 302 Longmuir, 61 Loose rivets, detecting of, 1517 Loss of metal and other materials, 1768 Louisiana & Arkansas Railway Lift Bridges, 737 Louisville & Jeffersonville Bridge failure, 1543 Low and high bridges, comparison of, 663 Lowe Brothers paints, 771 Loyalty, 1628 Lubrication of bushings and bearings, 1729 Lucius, Albert, 596 Lulu Island Bridge, draw protection, 780 piles, 1017 Lytton, B. C., arch cantilevering, 1504, 1505 |