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The Slingmax TPXC endless Twin-Path round sling has two internal load-bearing core yarns, two independent nylon covers, and external warning indicators for lifting heavy loads in applications such as shipbuilding, construction, aerospace, and other industries. This Twin-Path round sling contains two internal load-bearing K-Spec core yarns that act as two slings in one. If the load-bearing yarns in one side of the sling break, the other side will allow the load to be lowered. The internal yarns are covered by two color-coded layers of heavy-duty nylon webbing. If the red inner layer is visible from beneath the green outer layer, the sling should be removed from service and repaired. The external nylon webbing is soft to avoid scratching fragile or delicate loads, and it is flexible to conform to irregularly shaped loads. A Twin-Path round sling is five times stronger than a steel chain sling of the same weight, and is one-tenth the weight of a steel chain sling of the same capacity. The stretch of this nylon sling at it maximum load capacity is less than 1%.
This endless (also called type 5 or grommet) round sling is made of a continuous loop of webbing formed by joining the ends of the webbing with a load-bearing splice, and can be used in vertical, choker, and basket lifting configurations. The load-bearing or wear points of an endless round sling can be rotated each time it is used, which can help increase its life when compared to an eye-and-eye round sling. Two external warning indicators extend from underneath the sling's cover. If the sling has been overloaded, these indicators will retract and disappear, indicating that the sling should be removed from service. This sling meets American National Standards Institute (ANSI) and American Society of Mechanical Engineers (ASME) specification B30.9, Naval Facilities Engineering Command (NAVFAC) specification P-307 section 220.127.116.11, Occupational Safety and Health Administration (OSHA) specification 1910.184, and the Cordage Institute Roundsling Standard.
Slings are used to lift heavy objects for industrial applications. Types of slings include web slings, wire rope slings, chain slings, and mesh slings. The appropriate type of sling for an application depends on the strength-to-weight ratio, flexibility and resistance to bending, resistance to abrasion and cutting, resistance to crushing, resistance to stretching, and resistance to high temperatures and other environmental stressors. Slings have one, two, three, or four legs; or a continuous loop of webbing or wire rope. Legs are support branches that extend from a single point at the top of the sling to the item being lifted so the weight of the load is distributed evenly among the branches. Slings have eyes (loops) or alloy steel fittings on the ends.
A vertical lifting configuration connects a crane hook directly to a load with a single, vertical sling, usually by means of a hook. In a choker configuration, the sling wraps entirely around the load, and one loop passes through the other to form a slip noose, or choker. In a basket configuration, the sling passes under the load and both ends of the sling connect to the crane hook. Load capacity is the maximum weight to be lifted in a vertical configuration. The capacity in a choker configuration is approximately equal to the vertical capacity times 0.8. The capacity in a basket configuration, with sling ends at a 90-degree angle, is approximately equal to twice the vertical capacity. Load capacity in a basket configuration decreases if the angle of the sling is less than 90 degrees. For example, a sling with a capacity of 2,000 lb. in a vertical configuration will have an approximate capacity of (2,000)(0.8)=1,600 lb. in a choker configuration and an approximate capacity of (2,000)(2)=4,000 lb. in a basket configuration, if the sling ends are at a 90-degree angle to the load.
Slingmax manufactures slings and other rigging accessories. The company is headquartered in Aston, PA.
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