Fig. 75.—Cummings System of Metal Reinforcement. 
10° Crown 
J 
% Steel Rods @ 125 aoc 
Ke Steel $Strap 
EY SN 
\ 
Fig. 76.—Section of a Bridge With Forty-Foot Span, Lafayette, Ind. 
The Bed of the Stream is Paved With Concrete. 
