for the top chords and batter braces, and it the sections alone would indicate a saving 
of say tlii.ee lmndred pouuds of iron by the use of the twelve- inch cliannels, tlie 
others would bo more economical; for the twelve-inch channels require larger stay 
plates, lattice bars, and re-euforcing plates, besides a wider top chord plate, which 
would increase tlie weights of the cover plates, chord pins, post latticing, posfc stay 
plates, shoe plates, etc,, and even add a little to the lengths of the floor beam«. 
