The Manhole Sheave ("Pittsburgh") is used to guide pulling line or cable over the manhole edge when placing and removing cable in manholes equipped with pulling-in irons to support a sheave and shackle assembly. The unit consists of a reinforced, heat-treated wrought aluminum alloy frame with two self-lubricating, bronze-bushed aluminum sheaves. The frame includes holes in each side plate to accept a 1 1/4 in. (32 mm) diameter digging bar to prevent the sheave being knocked into the manhole. Approximate overall dimensions are 30 in. L x 12 in. W x 22 in. H. Available to accommodate cable diameters of 3 in., 4 in., or 5 in.