It consists of a single span of 820 ft. without anchor-arms, the latter being replaced by guys, and with a suspended span of 200 ft. The appearance of the bridge is bizarre in the extreme, and the structure is economic in neither weight of material nor cost of shop-work. Compared with an American bridge of the same span, capacity, and strength, the weights of metal in the 820-ft. span only would be about in the ratio of unity to 0.75.

The cantilever having the next longest span, viz., 790 ft., is the railway bridge at Memphis over the Mississippi River, This structure is both unsightly and uneconomical of material. Its layout of spans is unfortunate (but the War Department, and not the designer, is responsible for this), and the truss depths are far too small for both economy and appearance.

The next longest cantilever span is that of the Red Rock Bridge over the Colorado River on the Atlantic and Pacific Railway. This structure consists of a main span of 660 ft. and two anchor-arms of 165 ft. each, the length of the suspended span being 330 ft. The width between central planes of trusses is 25 ft.; and the truss depth varies from 55 ft. for the suspended span to 101 ft. for the vertical posts over the main piers. As the author is the person responsible for its layout, his criticism thereof will not be of much value. The bridge was designed to meet certain conditions, economy in first cost being the prime requisite; consequently the subject of aesthetics did not receive great consideration. Engineers and architects differ fundamentally in their opinions concerning the architectural effect in this structure. Some approve its appearance; others characterize it as harsh in its outlines. The relations between lengths of suspended span, cantilever-arms, and anchor-arms, and those of width and depth, although very hurriedly determined, have since been found to be just about the best practicable. This bridge, as before stated, is described very fully in the Transactions of the American Society of Civil Engineers for 1891.

There are many other cantilever bridges having main spans of from 400 ft. to 500 ft. or more, but space will not permit their enumeration.