300 TOWERS AND TANKS FOR WATER-WORKS. 



horizontal flanges shall be riveted. The web shall be stiffened 

 at appropriate intervals by vertical angles or otner approved 

 shapes riveted thereto. 



BALCONY. 



At some convenient point about the circular girder there shall 

 be constructed a balcony, with floor of segmental steel plate, 



not less than and inches wide, 



supported by steel brackets, so spaced and riveted to the girder 

 as to form a substantial support for at least five thousand (5000) 

 pounds concentrated load. 



At a point over one of the tower columns an opening.... 



inches by inches shall be made and reinforced by suitable 



angles about its upper sides. 



At safe intervals upright steel shape posts shall be safely 

 secured to the balcony or brackets, forming the support of a 

 substantial and ornamental balustrade to be surmounted by a 

 suitable steel hand-rail inches above the floor-level. 



HEMISPHERICAL BOTTOM. 



The bottom of the reservoir shall be riveted to the girder and 

 shall be formed of special curved steel plate not less than 



inch thick and a circular dished steel head 



of inch diameter of like thickness, and so fashioned that 



when riveted together the surface will form a hemisphere. 



INLET PIPE AND CONNECTIONS. 



The lowest point on the hemispherical bottom shall be tapped 

 and properly reinforced for connection with a standard expansion 



cast-iron joint of., diameter and provided as an inlet 



for the cast-iron bell and spigot supply main, which shall extend 



feet vertically to and terminate in a standard cast-iron 



foot bend supported by a substantial masonry pier. 



