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trussed beam[′trəst ′bēm]
A beam stiffened by a steel tie rod to reduce its deflection.
A beam or purlin stiffened with a tie rod. See also: Beam
1. A beam, usually of timber, reinforced with one or more tie rods.
2. A beam in the form of a truss; braced by one or more vertical posts supported by inclined rods attached to the ends of the beam.