cantilever

The Red Rock cantilever bridge over the Colorado river, with a centre span of 660 ft.

The cantilever rests on two river piers 120 ft. apart, centre to centre.

The great cantilever bridges have been erected in the same way, and they are specially adapted for erection by building out.

The cantilever and suspended girder types are as economical and free from uncertainty as to the stresses.

In long-span bridges the cantilever system permits erection by building out, which is economical and sometimes necessary.