BEGINNING OF TOWER STEEL ERECTION, MARCH 10, 1907 



lineal foot with connections, etc. Generally the 

 columns are in two-story lengths, although a few of 

 the basement columns are in four-story lengths. 



The corner columns, at the southeast front of the 

 building above the fourth story, are carried on a 

 double web riveted girder 30 inches deep and 18 feet 

 long, carrying a load of about 250 tons. 



Beginning at the basement, 36 of the columns 

 spaced 12 feet from centers compose the Tower, the 

 four center Tower columns extend up to the 46th tier, 

 while the other Tower columns extend up to the 40th 

 tier from which the dome springs. 



There is a total of 850 columns in the building, 

 the heaviest weighing about 28 tons. Above the 

 foundations and exclusive of the columns 17,000 

 members were required for the floors, bracing and 

 other parts of the building, which will give some 

 idea of the vast number of drawings which were 

 required for this building. 



ADJUSTING A COLUMN SPLICE 500 FEET ABOVE STREET 



[21 J 



