Abstract: A boom for a crane assembly includes first and second sections. The second section is configured to be at least partially nested within the first section of the boom, and is further configured to slide relative to the first section of the boom. Each of the first and second sections of the boom have a tubular cross-section. Furthermore, the first and second sections of the boom each include first and second pieces. The first piece has two edges extending lengthwise along the respective section, and the second piece has two edges extending lengthwise along the respective section. The first and second pieces are arranged such that the two edges of the first piece overlap the two edges of the second piece, and the first and second pieces are welded together along an exterior end of the overlapping edges.