Provide Model 1018S as manufactured by H & H Specialties Inc., South El Monte, CA.

Track shall be constructed of carrier rails roll-formed from 16 gauge galvanized steel into 1" x 5/8" "C" channel. Track rails shall be finished with a semi-gloss black powder coat.  Two rails shall be suspended from 1-1/2" Sch. 40 pipe backbone on 2'-0" intervals by steel hanger assemblies creating a 3/4" continuous slot for passage of carrier bodies.

Provide single carriers, spaced on 12" centers, constructed of two urethane-tired shielded ball bearing wheels fastened parallel to Nylatron GS carrier body with integral glides to keep carrier aligned at all times.  Install tapered neoprene bumper into carrier body to reduce noise.  Supply with heavy-duty hook, swivel eye, and trim chain for attachment of curtain.  Install rear fold guide and two round neoprene bumpers between each carrier to fold curtain at offstage edges and minimize noise.

Master carriers shall consist of two single carriers riveted to formed steel master plate. Connect to operating line with two formed steel cord clamps.

Single and double end pulleys shall bolt securely to the track rails and shall be equipped with 6" diameter Nylatron GS sheaves grooved for 1/2" operating line.  Install two 5/8" sealed precision ball bearings in each sheave.

Provide 6" Nylatron GS sheave with precision ball bearings in specially designed housing with heavy-duty sand bag to maintain proper operating line tension.

Black operating line shall be 1/2" diameter, stretch-resistant rope with spun polyester outer jacket braided over  polyester core.