Historical
ANSI O5.3-2002
Solid Sawn-Wood Crossarms and Braces - Specifications and Dimensions
Consists of specifications covering solid sawn-wood crossarms and braces manufactured from coastal Douglas-fir grown in the West Coast region; and from dense Southern pine of the following species: longleaf pine, shortleaf pine, loblolly pine, and slash pine. The specifications are intended to cover communications crossarms, power crossarms, heavy-duty crossarms, and heavy-duty braces. Crossarms are intended primarily for use as beams. Heavy-duty crossarms may also be used as struts or columns in braced H-frames. Braces are used for tension, compression-bracing, or both.
Alliance For Telecommunications Industry Solutions [atis]