TABLE OF CONTENTS. 



Card of Mill Extras 430 



Extras on Round and Square Bars. ... 431 



Miscellaneous Extras 431 



Mill Orders 432 



Cost of Shop Labor. . , 433 



Shop Cost of Steel Frame Buildings. . . 433 



Columns 433 



Roof Trusses 433 



Eave Struts 433 



Plate Girders 433 



Shop Cost of Bins and Stand-Pipes . . . . 434 

 Shop Costs of Individual Parts of 



Bridges 434 



Eye-bars 434 



Chords, Posts and Towers 434 



Pins 434 



Floorbeams and Stringers 434 



Shop Costs of Steel Bridges 435 



Shop Costs of Steel Tubular Piers 435 



Shop Cost of Combination Bridge Metal 435 

 Shop Cost of Howe Truss Bridge Metal 436 

 Cost of Erection of Steel Frame Office and 



Mill Buildings and Mine Structures. . 436 



Cost of Placing and Bolting 436 



Cost of Riveting 436 



Actual Costs of Erection 436 



Cost of Erection of Steel Bridges 437 



Hauling 437 



Falsework 437 



Erection of Tubular Piers 437 



Placing and Bolting 437 



Riveting 437 



Number of Field Rivets in Steel Spans. 437 



Actual Cost of Erection 438 



Transportation 438 



Freight Rates 438 



Cost of Painting 438 



Miscellaneous Costs 439 



Mill Building Floors 439 



Timber Floors on Tar Concrete Base. . 439 



Concrete Floors 439 



Creosoted Timber Block Floor 439 



Roofing for Mill Buildings 439 



Corrugated Steel Roofing 439 



Tar and Gravel Roofing 440 



Tin Roofing 440 



Slate Roofing 440 



Tile Roofing 440 



Windows 440 



Skylights 440 



Circular Ventilators 4.40 



Waterproofing 440 



Chain 440 



Nails 440 



Gas Pipe 440 



Steel Railroad Rails 440 



Wire Rope 440 



Manila Rope 440 



Hardware and Machinist's Supplies 440 



References 440 



CHAPTER XIV. ERECTION OF STRUCTURAL STEEL. 



Methods of Erection 441 



Plate Girders and Short Riveted Spans 441 



Truss Bridges 441 



Cantilever and Arch Bridges 441 



High Viaducts 441 



Roof Trusses, Mill and Office Buildings 441 



Elevated Towers and Tanks 442 



Erection Tools 443 



Design of Erection Tools 443 



Hoists 443 



Winches and Crabs 443 



Hoisting Rope 443 



Manila Rope 443 



Knots in Manila Rope 444 



Wire Rope 446 



Hoisting Tackle 447 



Rigging 447 



Efficiency of Tackle 451 



Chains 460 



Jacks 460 



Miscellaneous Tools 460 



List of Tools 460 



American Bridge Company List 460 



Actual Lists of Tools 460 



Erection of Truss Bridges 466 



Riveting 467 



Derricks and Travelers 470 



Gin Pole 470 



Guy Derricks 472 



"A" Derrick 472 



Stiff-Leg Derrick 472 



Boom Travelers 472 



Viaduct Travelers 472 



Gallows Frame 472 



Through or Gantry Travelers 472 



Derrick Cars 473 



Falsework 473 



Piles 476 



