General Products - ALP Industries Inc.

Bethlehem Liftpac Elevator RopeSECTION 2 - Elevator Products 34Liftpac Elevator Rope Technical DataLiftpacDiameterApprox. Wt. Nominal Strength (Lbs.)Inches mm (Lbs/Ft.) Traction EHS Traction3/8 9.5 0.23 9,000 11,0001/2 13.0 0.39 16,000 19,6005/8 16.0 0.62 25,400 30,800Liftpac is designed for use whereverelevator hoist ropes exhibit shortservice life. Liftpac is recommendedfor those applications where: (1)adverse operating conditions exist,such as where loads and groove pressuresare high; (2) reverse bends exist,and/or; (3) fatigue breakage with minimalsurface wear is the primary factorfor retirement.Liftpac is not designed to remedypoor rope performance due toworn sheaves and/or differentialgroove depths. Under these conditions,unsatisfactory rope performancewill still result.FEATURESFatigue Resistance. The compactedstrand surface minimizes theinterstrand and interlayer nicking thattakes place in elevator ropes, dramaticallydecreasing the amount of internalbreaks. This reduction of internal wirebreakage can also be expressed as anincrease in reserve strength. Bydecreasing internal breakage at theinterstrand contact points, Liftpacmaintains its strength longer than standardelevator rope in severe bendingapplications.Abrasion Resistance. Liftpac’scompacted strand design providesimproved abrasion resistance whencompared with 8-strand ropes becauseof the increased wire and strand surfacescontacting the sheaves anddrums.INSPECTIONDue to Liftpac’s compactedstrands, its slightly flattened crownappearance should not be misconstruedas wear. Two methods may be usedduring inspection to make a distinctionbetween Liftpac and a standard wornrope.(1) Check the outer wires in thestrand valleys. The crown wires of aworn standard rope will obviously beabraded or worn. As these wires travelinto the valleys, however, they resumetheir normal rounded shape. The wiresin a Liftpac rope retain their die drawnstate throughout the crown and valleys.(2) Check the ropes at the shackles.If Liftpac is being used, the ropewires at the shackles will have thesame flattened crown appearance. Ifthe standard rope is worn, the ropewires at the shackles will be rounded.Resistance To Diameter Reduction.Liftpac’s compacted designresists diameter reduction due to thehigher metallic content and less coredeterioration at the strand contact area.ASME and CAN/CSA inspectionand removal criteria apply.Noise Reduction. Liftpac’scompacted surface passes smoothlyover drums and sheaves, allowing foran extremely quiet running rope.FOR MORE INFORMATION CONTACT OUR NEAREST BRANCH OFFICE