Additional beams may span across between the main girders, for example in the form of bridge known as ladder-deck construction.
To reduce the required motion of the carriage, a moving receiving hopper runs between the main girders.
The superstructure consisted of two longitudinal main girders with transverse floor beams.
The Community is approached from the south across a bow-arched bridge whose two main girders each bears an unidentifiable coat of arms and the date 1890.
Soon, all the main girders for the building's shell had been erected.
They were marched aboard as prisoners and carefully "ironed-up" along the main girder.
As the structure superseded a centuries-old ferry, a footbridge alongside the main girders was provided on its eastern side.
Because the forces in each of its two main girders are essentially planar, a truss is usually modelled as a two-dimensional plane frame.
The recessed arch panels can now be easily removed to give access to the main girders for future inspection and maintenance.
The bridge's main girder was also strengthened, and a lightweight replacement deck was laid.