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At Hanes Supply, Inc.'s Buffalo Sling, we manufacture custom Nylon Slings, Web Slings, Polyester Slings, Twin-Path® Slings and Slingmax® Slings. Make sure you know the use, load and conditions for the sling you need. OSHA standards demand that the rated capacity be noted on each sling. Never exceed rated capacities of a web sling.
Each Buffalo Web Sling has a tag that states the manufacturer, the type of material, rated capacities, type of sling, and length and width of the sling. Each Buffalo Sling also has a warning tag about inspection and restrictions as to the web sling. Reading the facts about web slings should help you decide. If you have any questions, give Buffalo Sling a call at 888-426-3755.
What is the Difference Between a Nylon Sling and a Polyester Sling?
Nylon is strong, lightweight and very flexible. It is highly resistant to alkalies, but should not be used in acid conditions. When treated for abrasion it has a stretch factor of 10%. Nylon can be used in temperatures up to 194°F.
Polyester webbing has become very valuable especially in applications that subject the sling to acid conditions. Also polyester slings are excellent where headroom is limited because of the webbing’s low stretch characteristics. Polyester can be used in temperatures up to 194°F.
Web Material – Soft and Flexible
Web Slings are made from nylon or polymer lifting yarn that is woven into various widths and thicknesses. A tough abrasion resistant jacket yarn surrounds the lifting yarn.
Red Warning Core
Red colored yarns under the jacket show when the jacket is worn or cut through and indicates that the sling should be taken out of service.
The stretching of web slings allows a cushion against sudden shock. When loaded at rated capacity, a nylon sling will stretch 6-8% and polyester 3-4% Slings return to normal length when not loaded.
Use of Sling
Load Surface Problem: Protect sling from being cut by LOAD EDGES, CORNERS, PROTRUSIONS, and ABRASIVE SURFACES. Certain accessories available from Hanes Supply could help protect the sling.
Avoid Crushing and Knotting of Slings: Don't crush a sling between load and other surface.
Do not expose the sling to the sun for an extended period of time. Prolonged sun exposure of the sling will degrade lifting capacity.
Different Hitches' Rated Capacities: Slings have the largest load when used in the basket hitch. Capacity in the vertical hitch is 60% of that in the basket hitch. Capacity in the choker hitch is 40% of basket hitch capacity.
Types of Web Slings
Type 1 (TC)
Slings have a triangle and choker fitting on either end. This is most commonly used in a choker hitch, but can also be used in basket and vertical hitches.
Type 2 (TT)
Slings have a triangle fitting on each end. Type 2 slings are more economical than Type 1. They are normally used in a basket hitch, can be used in a vertical hitch but they cannot be used in a choker hitch.
Type 3 (EE)
Flat Eye slings are very popular slings that can be used in all three types of hitches. They are easy to remove from beneath the load after the load is in place. Unless Type 4 is requested, Type 3 will be supplied as the standard EE sling.
Type 4 (EE)
Twisted Eye slings are similar to Type 3 except the eyes are turned 90° to form a better choker hitch. This type of eye also nests together better when used in a basket hitch.
Type 5 (EN)
Endless slings are very economical. They can be used in all three types of hitches and wear points can be moved to increase sling life. The sling legs can be spread for improved load balance.
Type 6 (RE)
Reversed Eye slings have protective webbing over the entire body and eyes. This extra webbing reinforces the sling and protects it from wear, resulting in an exceptionally strong sling.
Endless Path Round Slings
Unique Flexi-grip Sling construction produces outstanding handling and rigging characteristics. The sling body is exceptionally supple, conforms readily to uneven and oddly shaped loads during a lift. Additionally, the sling has a softness which provides a firm gripping action on e load, particularly when used as a choker. The 100% polyester construction also provides extremely low (3%) elongation at rated loading.
High-strength, low-stretch polyester fibers run continuously, peripherally in the Flexi-grip sling body to develop the lifting capacity designed into each model. A double-walled polyester fabric jacket is sewn permanently in place to contain and protect the load-bearing fibers.
Each sling body is constructed of an endless loop of polyester fibers encased in a double-layer woven jacket. In addition to protecting the main body of the sling from abrasion and other damage, the jacket prevents sunlight from penetrating the body and causing ultraviolet degradation of the polyester fibers. Dirt and grime are also kept away from the load-bearing core of the sling by the jacket. Because it is 100% polyester moisture absorption, rot and mildew are virtually non-existent.
Polyester offers good resistance to common industrial acids (except concentrated sulfuric acid) and hot bleaching solutions. Slings may be used in the presence of alcohol, dry cleaning solvent; hydrocarbons, halogenated hydrocarbons, ketones, crude oil, lubricating oil, soaps, detergents, seawater and weak alkalis, but should NOT be exposed to strong alkalis at elevated temperatures, and should never be used under temperatures conditions above 194 degrees F.
Rated Capacity and Effects of Angles
When slings are used at an angle (i.e. - two slings or one sling in a basket attached to only one crane hook), sling capacity is reduced. How much it is reduced depends on the degree of the angle. You can determine whether a sling will be rated high enough if you know the angle between the sling leg and the vertical. Once you know this angle, multiply the sling's rating by the appropriate factor in the table. This will give you the sling's reduced rating.
Sling Capacity Decreases as the Angle Decreases
A sling capable of lifting 1,000 lbs. in a 0° vertical basket htich, can only lift 866 lbs. at a 30° angle at a 45° angle and 500 lbs. at 60° angle.
CAUTION: Do not exceed rated capacities!
Inspection and care of Synthetic Web Slings Prior to use, make certain that each sling meets the requirements of your order and that it has not been damaged in delivery to you.
Determine that the weight of the load is within the rated capacity of the sling.
Select sling having suitable characteristics for the type of load, hitch and environment.
Slings shall not be shortened or lengthened by knotting or other unapproved methods.
Damaged slings shall not be used.
Slings shall be hitched in a manner providing control of the load.
Protect sling form being cut by LOAD EDGES, CORNERS, PROTRUSIONS, and ABRASIVE SURFACES.
Keep all portions of the human body from between the sling and the load, and from between the sling and the lifting hook.
Personnel should stand clear of the suspended load.
Personnel shall not ride the sling.
Shock loading should be avoided.
Slings should not be pulled from under a load when the load is resting on the sling.
Slings should not be stored in an area where they will be subjected to mechanical damage, moisture, extreme heat or ultraviolet light.
Twisting of slings shall be avoided.
Loads applied to the hook should be centered in the base of the hook to prevent point loading on the hook.
Before lifting, make certain that the sling, attachments, or load shall not snag. Personnel shall be continuously alert to avoid snagging or bumping.
In a basket hitch, the lifting hook should be above the center of gravity and the load balance to prevent slippage out of the sling.
When making a multiple leg lift, the capacity rating of each sling must be downgraded in accordance with the Effect of Angle Chart.
Slings should not be dragged on the floor or over an abrasive surface.
In a choker hitch, slings with hardware shall be long enough so that the choker fitting chokes on the webbing and never on the triangle.
Nylon and polyester slings shall not be used at temperatures in excess of 194 degrees F.
Exposure to sunlight or ultraviolet light degrades the strength of synthetic web slings.
Inspect slings for damage and defects prior to each use.
WARNING: Web slings can be cut by contact with sharp or unprotected load edges. Padding must be used to protect the slings.
Additional requirements and safe operating practices are outlined in current OSHA and ANSI B30.9 regulations.
Section 5.3 – Environmental Considerations
Proper usage and knowledge of slings is an essential safety factor for all sling usage. Environmental conditions for slings is too often overlooked.
Slings should be stored in a cool dry and dark place, and should not be exposed to sunlight, to prevent mechanical or chemical damage when not in use.
Chemically active environments can effect the strength of synthetic web slings in varying degrees ranging from none to total degradation, The sling manufacturer should be consulted before slings are used in chemically active environments.
Nylon is subject to degradation in acids, ranging from none to total degradation. Polyester is resistant to many acids, but is subject to degradation, ranging from none to moderate in some acids.
Each application should be evaluated, taking into consideration the following:
Type of acid
Polyester is subject to degradation in alkalis, ranging from none to total degradation. Nylon is resistant to many alkalis, but is subject to degradation ranging from none to moderate in some alkalis.
Each application should be evaluated, taking into consideration the following:
Type of alkali
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.
Slings incorporating aluminum fittings shall not be used where fumes, vapors, sprays, mists or liquids of alkalis and/or acids are present.
Environments in which synthetic webbing slings are continuously exposed to ultraviolet light can affect the strength of synthetic webbing slings in varying degrees ranging from slight to total degradation.
A) Factors that affect the degree of strength loss are:
Length of time of continuous exposure
Sling construction and design
B) Suggested procedures to minimize the effects of ultra-violet light:
Store slings in a cool, dry and dark place when not being used for prolonged periods of time.
Inspect slings weekly or more often depending on frequency of sling use.
C) Visual indications of ultra-violet degradation are:
Bleaching out of sling color
Increased stiffness of sling material
Surface abrasion in areas not normally in contact with the load.
D) Proof Testing:
Slings used in environments where they are subject to continuous exposure to ultra-violet light should be proof tested to two times rated capacity annually, or more frequently depending on severity of exposure.
How to Order Web Slings
When ordering slings always consider the type of hitch, capacity tables and the sling-to-load angles.
When Placing an Order, Please Specify:
Sling Material (Nylon or Polyester)
Sling Type and Code Number
Number of Plies - Number of plies refers to the thickness of the webbing in Buffalo Web slings.
Type of Webbing - Buffalo Sling handles a Light Duty (#6) and heavy-duty line of webbing (#8).
Sling Length - Web Slings can be made to virtually any length.