Beam, Built-Up

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.