Pre-stressed concrete is an ideal material for beam bridge construction; the concrete withstands the forces of compression well and the steel rods imbedded within resist the forces of tension.

The beam, powered by the cylinder piston ... because it is dragged back up the cylinder by the weight of the pump rods at the other end of the beam. The Kew Bridge Steam Museum in London has ...

Consisting of a sucker rod string and a sucker rod pump, beam pumps are the familiar jack pumps seen on onshore oil wells. Above the surface, the beam pumping system rocks back and forth.