research & investigation

truss types

Howe Truss

The Howe truss is made up of vertical and diagonal members. The diagonal members of this type of bridge slope towards the center of the bridge in an upward manner.

Pratt Truss

The design of the Pratt truss is similar to that of the Howe truss, except for the diagonals that slope downwards in the former. Caleb and Thomas Pratt invented the Pratt truss in the year 1844. The maximum length of this bridge can be 250 feet and it is commonly used as a railway bridge.