built-up beam

built-up beam

[′bilt‚əp ′bēm]
(engineering)
A structural steel member that is fabricated by welding or riveting rather than being rolled.

built-up beam

A beam composed of multiple parts, such as a box beam, compound beam, lattice beam, and angle girder. See also: Beam

Beam, Built-Up

 

an element of framed structures consisting of individual angle irons, channels, I-beams, and similar simple metal sections joined into a single unit by batten plates or lattices. Built-up beams are chiefly used as structural elements under compression, such as columns or chord members under compression in trusses. They are used particularly where the danger of buckling necessitates an increase in the cross-sectional radius of gyration of some member, that is, a reduction in the member’s flexibility. In such cases, the cross-sectional components of a built-up beam can be separated sufficiently to prevent buckling and then connected by single-or double-diagonal crossbars or by batten plates.

built-up beam

built-up beam on a post
1. A beam made of structural metal units (such as plates and angles) which are riveted, bolted, or welded together.
2. A beam of precast concrete units which are joined by shear connectors.
4. A timber made up of several pieces fastened together, forming one of larger dimensions.

compound beam, built-up beam

compound beam
A rectangular beam composed of smaller timbers over which planks are nailed on each side; the composite unit is joined together by bolting or by gluing.