eenforced with trusses.
These standard size trusses and other parts of bridges were carefully made by the skilled engineers of the construction corps, and tested under weights greater than any they would conceivably be called upon to bear.
These parts were kept constantly on hand so that repairs could be rushed at short notice.
The Bridge over Bull Run near Union Mills that was destroyed seven times
Reenforced with trusses-transformed into a standard bridge 473 miles of road from Louisville, through Nashville and Chattanooga, to Atlanta, 288 miles of which were constantly subject to raids from the foe — the portion from Nashville to Atlanta; that this single-stem road supplied one hundred thousand men and thirty-five thousand animals for one hundred and ninety-six days; and that to have delivered as much food by wagon would have been entirely impossible, since even to have hauled as much a short distance would have taken thirty-six thousand eight hundred six-mule wagons, and,