Document Type and Number:
Japanese Patent JPS5546745
Kind Code:
B2
Abstract:
An elongate cantilever boom assembly. The assembly is fabricated from identical U-shaped extrusions. The web is thicker than the legs of the extrusion so that when the extrusions are welded together the webs which are positioned at the extreme fiber have the greatest stress resistance to provide a strong, lightweight boom. The legs define tongue and groove means, one leg defining a tongue and the other the groove so that a pair of such extrusions from a single die may be juxtaposed in tongue and groove engagement for welded securement.
Application Number:
JP981473A
Publication Date:
November 26, 1980
Filing Date:
January 23, 1973
Export Citation:
International Classes:
E06C5/04; A62C27/00; B66C23/64; B66C23/697; B66C23/70