BALL ASSEMBLIES: 1" dia. steel ball x 1-13/16" overall housing diameter. Mounting bolt is 1/4"-20.
BALL CAPACITY: 50 lbs. per ball with max. unit load not to exceed the capacity of 4 balls (200#).
FRAMES: 3-1/2" x 1-1/2" x 10 ga. steel with balls in set high position (1/4" above side frames) only.
FRAME CAPACITY: 1300 lbs. maximum distributed live load per 10' section with supports at 10' centers; 3200 lbs. at 5' centers.
PLATES: Balls are attached in square pattern to 10 ga. formed plates up to 39" BF. Above 39", plates are 7 ga.
COUPLINGS: Butt type.