460 



ERECTION OF STRUCTURAL STEEL. 



CHAP. XIV. 



Chains. Chains should be made of the best grade of double refined iron, and should be 

 fabricated with great care. Details of a f-in. ring chain; a |-in. hook chain, and of a f-in. twin 

 hook chain, as made for the American Bridge Company, are given in Fig. 6, and data on chains 

 are given in Table VIII. 



Jacks. Hydraulic and power lifting jacks of the necessary capacity should be provided. 



Miscellaneous Tools; In addition to the standard tools required by bridge carpenters and 

 by the blacksmiths many special tools are required by structural steel erectors. The most im- 

 portant special tools required in steel erection as used by the American Bridge Company are 



STEAMBOAT JACK 



TERRY OLD MAN 



SHEAR FOR CORRUGATED STEEL STEAMBOAT RATCHET 



FIG. 15. MISCELLANEOUS TOOLS FOR STEEL ERECTION. 



given in Fig. 7 to Fig. 14. An improved "old man" as used by Terry and Tench is shown in Fig. 

 15. A corrugated rolling shear, and a steamboat jack and a steamboat ratchet are also shown 

 in Fig. 15. The special tools used by the Chicago Bridge and Iron Company for the erection of 

 elevated tanks are given in Fig. 16 and Fig. 17. 



LIST OF TOOLS. The tools required for any job will depend upon the size of the work, 

 the number of men employed, and upon local conditions. A complete list of the tools that are 

 commonly used by structural steel erectors is given in Table IX. 



Actual lists of the tools used for the erection of a steel railway bridge, a steel highway bridge, 

 and a steel mill building are given in Table X, Table XI, and Table XII, respectively. 



