Safety device for roof work

摘要: A mated pair of sleeper bars (34) comprises a first bar (25) having one end (28') thereof notched to form two fingers (29') and three slots (31'), while the second is (29) (31), with adapted fit within (31') other (25'). The mating (29 29') (31 31') are drilled for insertion connecting pin (37) pivotally locking matched ends (28 28') (25 25') together. plurality compartments (42) formed along length each 25'), compartment being receive hold container (44) filled fluid material.