Knowra Truss bridge Truss bridge A bridge whose load-bearing framework uses interconnected members arranged in triangles. Its members carry loads mainly through tension and compression.
Truss : A framework of interconnected members, commonly arranged in triangles, that carries loads through tension and compression. A truss bridge uses this structural framework as its primary load-bearing system.
Triangle : A polygon with three sides whose shape cannot change without changing a side length. Triangular units give a truss its geometric stability.
Warren truss : A truss pattern of alternating diagonal members that form a succession of triangles. Its repeating geometry is a common way to arrange a bridge's load-bearing members.
Covered bridge : A bridge with a roof and enclosing walls that protect its structural framework from weather. Many early American covered bridges used timber trusses.
Rail transport : The movement of passengers and goods by trains on railway networks. Truss bridges helped railways cross rivers and valleys while supporting heavy locomotives.
Tension : An internal force that pulls material apart along its length. Some bridge members resist loads by being pulled, especially in particular truss layouts.
Truss member : A straight structural element in a truss, modeled as carrying axial tension or compression. These individual elements form the bridge's load-bearing framework.
Pratt truss : A truss pattern with diagonals sloping toward the center, typically placing them in tension under gravity loading. This arrangement suited many metal railway bridges because its tension diagonals could be relatively slender.
Iron bridge : A bridge whose principal structural elements are made from cast or wrought iron. Iron enabled truss designs with stronger, more durable members than many timber alternatives.
Bridge inspection : The examination of a bridge to identify deterioration, damage, and safety risks. Numerous members and joints can conceal corrosion, fatigue, or connection failures.
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