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

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YOUR SLING AND RIGGING SPECIALISTsynthetic Web slings5.2 - MecHanIcal consIDeRatIons5.2.1 Use only if trained. Determine weight of the load. The weight of the load shall be within therated capacity of the sling.5.2.2 Select the proper sling having suitable characteristics for the type of load, hitch and environment.5.2.3 Slings shall not be loaded in excess of the rated capacity. Consideration should be given tothe angle of lift (sling-to-load angle), which affects rated capacity.5.2.4 Slings with fittings which are used in a choker hitch shall be of sufficient length to assure thatthe choking action is on the webbing, and never on the other fitting.5.2.5 Slings used in a basket hitch shall have the load balanced to prevent slippage.5.2.6 The opening in fittings shall be the proper shape and size to insure that the fitting will seatproperly in the hook or other attachments.5.2.7 Slings shall always be protected from being cut by sharp corners, sharp edges, protrusionsor abrasive surfaces.5.2.8 Slings shall not be dragged on the floor or over an abrasive surface.5.2.9 Slings shall not be twisted or tied into knots, or joined by knotting.5.2.10 Slings shall not be pulled from under loads when the load is resting on the sling.5.2.11 Do not drop slings equipped with metal fittings.5.2.12 Slings that appear to be damaged shall not be used unless inspected and accepted asusable under Section 5.2.5.2.13 The sling shall be hitched in a manner providing control of the load.5.2.14 Portions of the human body should be kept from between the sling and the load, and frombetween the sling and the crane hook or hoist hook.5.2.15 Personnel should stand clear of the suspended load.5.2.16 Personnel shall not ride the sling.5.2.17 Shock loading should be avoided.5.2.18 Twisting the legs (branches) shall be avoided.5.2.19 Load applied to the hook should be centered in the base (bowl) of hook to prevent pointloading on the hook.5.2.20 During lifting, with or without the load, personnel shall be alert for possible snagging.5.2.21 The slings' legs (branches) should contain or support the load from the sides above thecenter of gravity when using a basket hitch.5.2.22 Slings shall be long enough so that the rated load (rated capacity) is adequate when theangle of the legs (branches) is taken into consideration.HEADQUARTERS: 55 James E. Casey Drive • Buffalo, NY 14206 PHONE: 716.826.2636 FAX: 716.826.4412 www.hanessupply.com56
synthetic Web slingsYOUR SLING AND RIGGING SPECIALIST5.3 - enVIRonMental consIDeRatIons5.3.1 Slings should be stored in a cool, dry and dark place, and should not be exposed to sunlightor ultraviolet light, to prevent mechanical or chemical damage when not in use.5.3.2 Chemically active environments can affect the strength of synthetic web slings in varying degreesranging from none to total degradation. The sling manufacturer should be consultedbefore slings are used in chemically active environments.a. acIDs1. Nylon is subject to degradation in acids, ranging from none to total degradation.2. Polyester is resistant to many acids, but is subject to degradation, ranging from noneto moderate in some acids.3. Each application shall be evaluated, taking into consideration the following:i Type of Acidii Exposure to conditionsiii Concentrationiv Temperatureb. alkalIs1. Polyester is subject to degradation in alkalis, ranging from none to total degradation.2. Nylon is resistant to many alkalis, but is subject to degradation ranging from none tomoderate in some alkalis.3. Each application shall be evaluated, taking into consideration the following:i Type of Alkaliii. Exposure to conditionsiii Concentrationiv Temperature5.3.3 Nylon and polyester slings shall not be used at temperatures in excess of 194°F (90°C),however, they may be used in temperatures as low as -40°F (-40°C).5.3.4 Slings incorporating aluminum fittings shall not be used where fumes, vapors, sprays, mistsor liquids of alkalis and/or acids are present.5.3.5 Environments in which synthetic webbing slings are continuously exposed to ultra-violetlight can affect the strength of synthetic webbing slings in varying degrees ranging fromslight to total degradation.a. Factors which affect the degree of strength loss are:1. Length of time of continuous exposure2. Sling construction and design3. Other environmental factors such as weather conditions and geographic location.b. Suggested procedures to minimize the effects of ultra-violet light1. Store slings in a cool, dry and dark place when not being used for prolonged periodsof time2. Inspect slings weekly or more often depending on frequency of sling usec. Visual indications of ultra-violet degradation are:1. Bleaching out of sling color2. Increased stiffness of sling material3. Surface abrasion in areas not normally in contact with the load.d. Proof-Testing – Slings used in environments where they are subject to continuousexposure to ultra-violet light should be proof-tested to two times rated capacity annually,or more frequently depending on severity of exposure.HEADQUARTERS: 55 James E. Casey Drive • Buffalo, NY 14206 PHONE: 716.826.2636 FAX: 716.826.4412 www.hanessupply.com57
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twin-path® slings in action - Hanes Supply, Inc

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