320 TOWERS AND TANKS FOR WA7 E'i-M'ORKS. 



and balustrade which surmounts it. The tower is entirely inde- 

 pendent of the steel structure which it encloses. 



The walls of the tower are 19 and 14 inches thick in the tower 

 part, exclusive of the veneer; in the upper part the thickness is 

 12 inches reduced to 8 inches for the panels which relieve the 

 surface. 



The walls are reinforced mainly by a single row of vertical 

 bars about 12 inches apart, with horizontal rings outside of these 

 bars and about 12 inches apart. These are all square twisted 

 bars, and reinforcing is required to be not less than 0.3%. The 

 structure is designed to resist a wind pressure of 40 Ibs. per square 

 foot on its flat surface. 



The concrete was of Portland cement, clean sand and i-inch 

 broken stone, machine mixed, and of proportions 1:2:4. After 

 completion the exterior surface was given a sand float finish, 

 1:1 Portland cement and silica sand. This was applied with 

 a wood float and thoroughly rubbed in, averaging inch in thick- 

 ness. 



The block work was of gravel concrete i : 4. Each block 

 had a facing of cement and white silica sand 1:2^, with an addition 

 of i\% of Medusa waterproofing. Messrs. Alvord & Hun lick, 

 of Chicago, were the engineers for the design and construction 

 of the entire water-works plant, and the architectural details were' 

 worked out by Mr. Victor A. Matterson, of La Salle, 111. The 

 contractors were George Rackle & Sons Co., of Cleveland, 

 Ohio. 



The water-works plant is owned by the Gary Heal, Light, 

 and Water Company, to whom is indebted not alone the "Steel 

 City" of Gary, but every single community and municipality 

 everywhere, who should profit by this example of an artistic- 

 public structure " A thing of beauty is a joy forever." 



