A long spar, beam or a-frame structure, to support a hoist.
Classification: Parts of pulley tackle and hoists other than skip hoists or hoists of a kind used for raising vehicles
NSN 5925-01-082-0591
NSN 6220-01-623-5919
NSN 7035-01-293-0322
NSN 6620-01-116-2632
NSN 5835-01-366-5907
NSN 2925-01-133-8128
NSN 6320-00-886-9771
NSN 4140-00-486-6292
NSN 5990-00-022-2957
NSN 5998-01-328-4726
NSN 5895-01-515-9710
NSN 5998-01-429-0119