twin-path® slings in action - Hanes Supply, Inc

Winch linesYOUR SLING AND RIGGING SPECIALISTGUIDelInes foR tHe Useof bRaIDeD WIncH lInesRoPe stRenGtHNote carefully the quoted breaking strengths of the various SamsonBraid sizes. These are approximate average breakingstrengths and are subject to a plus or minus 5% testing tolerance.Advertised breaking strengths are determined by the standardcordage testing and do not cover conditions such as sustainedloads or shock loading. These strengths are attained under laboratoryconditions. Remember also, that this is a breaking strength--not a recommended working load capacity. (See next paragraphfor working load factors.)assIGneD WoRkInG loaD factoRsWill vary in accordance with varying safety practices and policiesof different utilities and industrial users. However, our recommendation,and one that is fairly well accepted in the industry, isa minimum 5:1 working load factor. Thus, your maximum workload should be approximately 20% of the quoted breakingstrength. This factor will provide greater safety and extended servicelife of the winch line. A low working load factor is not only dangerous,but poor economy as it overworks the fibers and shortensthe life of the line.DIelectRIc PRoPeRtIesBraided Wrinch Lines have been described as a "non-conductor".It is our hope that it is never turned over to a line crew on theseterms. It is important to note that most quoted Dielectric Propertiesare results obtained from new, clean rope, and hold true onlyunder such ideal conditions. Dirt, grease, other foriegn matter andmoisture, including humidity, will all alter the non-conductivity/conductivityof this or any other synthetic rope or material.sHaRP cUttInG eDGesBraided winch lines should not be exposed to sharp edges andsurface such as metal burrs on Winch Drums, sheaves, shackles,thimbles, wire slings, etc. Braided Winch Lines are made fromsynthetic fibers, and as such, can be cut and damaged by sharpedges. When installing winch lines on old truck units, great caremust be exercised to assure that the rope is not coming in contactwith hardware that has been scored and chewed by previouslyused wire lines. Sheaves, shackles, thimbles, etc. should, in mostcases, be replaced. Other metal surfaces should be carefully examinedand dressed if necessary.attacHInG lIne to WIncH DRUMThere are various methods of attaching a winch line to a winchdrum: the use of a wedge or plug and set screw in the main bodyof the drum, or "U" bolt through the side of the flange. Anothermethod involves welding a round plug to the winch drum. The softeye at the bitter end of the winch line is placed over the plug andheld in place with a flat keeper which is screwed in flush with thetop of the plug. Be sure the attachment method does not have asharp edge that will cut the line under load. If possible, it is advisableto have an eye splice in both ends of the Winch Line sothat it can be reversed in the event of damage to one end. This isnot always possible, depending on the method of attachment tothe winch drum, and whether or not a closed thimble is splicedinto the eye. If an eye is not used at the drum end, then this endshould be tightly whipped with a strong twine. Important: The endconnection is not designed to carry any load, so at least fourwraps should always be kept on the drum.DeteRMInInG lenGtH of RoPe tHat canbe PUt on a WIncHThe formula for rope capacity on a winch drum is:Length to be stored = A(B2 - C2)15.3 x dia of rope 2A, B, C, and diameter are in inches.FlangeDiameterenD-foR-enDInGIt is recommended that every winch line be rotated End-forEnd ona periodic basis. This will vary high stress and wear point and extenduseful life. Recommended period is six (6) months, at whichtime visual inspection and washing can be programmed.WInDInG RoPe on WIncH DRUMThe first layer (wrap) around winch drum should be put on closelyand tightly. Initial winding tension (load) should be approximately50 pounds. This will prevent subsequent wraps from slippingdown between turns when tension is applied. Braided Winch Lineswill tend to self-level themselves. IMPORTANT: Recommend atleast four wraps always be left on winch drum.DO NOT WORKBELOW 4 TURNSON A DRUMabRasIon PRotectIon of lIneBraided Winch Line have a relatively high degree of resistance toabrasion and fusing. However, all synthetics are subject to fusingif subjected to enough friction and heat, and therefore such practicesas surging on a Gypsy head winch, hard rendering aroundpoles or over cross-arms, etc., should be avoided whenever possible.Do not attach end of line to drum by using core only.HEADQUARTERS: 55 James E. Casey Drive • Buffalo, NY 14206 PHONE: 716.826.2636 FAX: 716.826.4412 www.hanessupply.com77