ADC Model 140-R is identical to Model 140 except that No. 4237 Single Carriers and No. 1438 Master Carriers are used instead of No. 4201 and No. 1402. ADC RIG-I-FLEX is a versatile I-beam track which has been engineered for both curved (Model 140) and straight (Model 141) cord operated systems as well as for "walk-along"(Model 142) systems. It was designed for medium weight curtains on stages and TV studios and for enclosing areas in industrial plants. Overall track length should not exceed 60' for split draws (bi-parts) or 40' for one-way draws. 

Model 140-R by Automatic Devices utilizes spindles and idler brackets (Not included in CWANA track pricing) for guiding the operating cord along the curved areas. The track can be curved on-the-job or at the factory (optional) to a minimum 2’ radius.