THE: ST. Louis COUSEUM.* 



The St. Louis Coliseum Building is a rectangular brick building 

 1 86' 2" x 322' 3". The steel framework is made entirely independent of 

 the masonry walls and consists of three-hinged arches properly braced. 

 The Coliseum has an area of 222 x 112 feet clear of the curb wall. 

 Ordinarily there are seats for 7,000 persons on the main floor and the 

 galleries, but for convention purposes with seats in the arena the num- 

 ber can be increased to 12,000 persons. 



The steel framework consists of a central arched section adjoined at 

 each end by a half dome formed by six radial arched trusses. The main 

 arches forming the central section have a span 178' 6" c. to c. of shoe 

 pins, are spaced 36' 8" apart, and are connected by lateral bracing in 

 pairs. The pins at the foot of the arches are 4 7-16" diameter, and at 

 the crown the pin is 2 5-16" diameter. The rise of the arches is 80' o", 

 the lower chord points being in the curve of a true ellipse. 



The end radial trusses correspond essentially to the semi-trusses of 

 the main arches except for their top connection, where their top chords 

 are attached to a semicircular frame supported by the end main trusses 

 and designed to receive thrust, but no vertical reaction, as shown in 

 Fig. 170. 



The roof covering of asphalt composition is laid on i^-inch boards, 

 resting on 2^2 x i6-inch wood joists, 3 feet apart and ceiled underneath. 

 These, in turn, are carried by the steel purlins of the structure, which 

 are spaced about 16 feet apart. The gallery floor beams are carried on 

 stringers of 8-inch channels spaced 3' 8" center to center, carried by 

 girders running between, and supported by the arches. The rear string- 

 er is a plate girder ; the front one is a latticed girder, the gallery beams 

 running through the latter and cantilevering out 5' 4". The main floor 

 beams, supporting the lower tier of seats, consist of Q-inch I beams, 

 spaced 3' 8" center to center, which are similarly carried on girders, and 

 their lower ends rest on a brick wall. 



'Engineering News, Aug. 10, 1899, and Engineering Record, 1899. 



