THE C., B. & 0. RAILROAD BRIDGE AT PLAT TSMOUTH, NEB. 473 
Pier No. 6, is founded on concrete twelve by thirty-three, and three feet 
deep. The masonry of piers four, five and six measures seven by twenty-seven 
feet under the coping. Each has semi-circular ends, and is about thirty feet in 
height. The three deck spars rise on these piers to a height of about thirty feet, 
they are of the ‘‘Pratt”’ truss, with single intersection-webs and inclined end- 
posts, and have eight panels, each of twenty-five feet. The floor beams rest on 
the top chords, and the track stringers are riveted to the webs of the floor beams. 
Leaving the six hundred feet of deck spans behind, we pass on to an iron 
viaduct of fourteen hundred and forty feet in length, and ranging from thirty to 
twenty-five feet in height; consisting of forty-eight spans of thirty feet each. 
On this viaduct the floor system is uniform with that of the preceding five spans, 
viz: The track stringers are spaced nine feet between centers, thereon rest nine 
by nine inch oak ties, spaced fifteen inches from center to center, leaving open 
spaces of six inches. ‘These ties are generally twelve feet long, and locked on 
each end by roxio inch guard rails. At intervals of five feet a sixteen foot tie 
projects on each side of the track to support a foot-walk, and at intervals of 
twenty-five feet ties of eighteen feet length are introduced to support at each end 
an iron stanchion, through an eye in the top of which a three-fourths inch wire 
cable traverses the nineteen hundred and sixty feet of iron and steel work, for 
hand rails. Three by four inch guard angle irons are also bolted to the ties six 
inches inside of the track rails, to guide trains accidentally leaving the rails. 
Having passed the viaduct, we enter upon a temporary wooden trestle work 
of two thousand feet in length, containing one hundred spans of twenty feet 
each from twenty to thirty feet in height. This trestle work is for temporary use 
until it is buried in an embankment which is rapidly progressing. Beyond this 
trestle work an embankment extends about one and a half miles, ranging from 
twenty-five five to feet in height. 
A summary of the whole work, cut, bridge work and embankment, makes it 
about three and a half miles long. Iron and steel structure, twenty-nine hun- 
dred and sixty feet, and wood two thousand feet. Of the two four hundred feet 
spans, the top and bottom chords, inclined end posts, main and counter ties, lat- 
eral rods, pedestals, rollers, and all chord and lateral pins are of steel. The 
intermediate posts, end suspenders, lateral struts, portals, stringers and floor beams 
are of iron. The three deck spans are entirely of iron except the pins, which are 
steel. 
It requires considerable thought to realize the value of the numbers repre- 
senting the quantity of material required for the entire work. Of steel five hun- 
hundred tons were used. Iron in the viaduct, four hundred and forty tons; deck 
spans, four hundred and eight tons; bridge proper, three hundred and twenty 
tons. Total, eleven hundred and sixty-eight tons. Timber, in wood trestle, four 
hundred and forty thousand feet, (board measure); foundation of bridge, five 
hundred thousand feet; oak in bridge floor, three hundred and seventy-five 
thousand. Total, one million, three hundred and fifteen thousand feet, besides a 
