95. This Contractor
shall furnish and install a set of rigging for raising the top of the contour
curtain into position. This set shall
consist of ten (10) twelve (12") inch diameter self-lubricating machine
turned loft blocks, one (1) sixteen (16") inch diameter machine turned
mechanical load brake head block with chain wheel, one (1) two (2") inch
pipe batten hung on three-eighth (3/8") inch steel cables. The cables shall be attached to the
counterweight frame by one-half (1/2") inch turnbuckles. The counterweights shall be operated on two
(2") inch tee track guides bolted to wall opposite counterweight system by
U straps. An endless chain shall be used
to operate this set and the chain shall have a keeper to lock both sides of the
chain.