Slings. Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE

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1 Slings Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE Mazzella Crane Service Phone: CRANE Indusco Wire & Supplies Phone:

2 Wire Slings, Alloy Chain Slings & Synthetic Slings We are a leader in fabrication of wire rope slings, chain slings and synthetic sling products. We also make ergonomic high-performance specialty slings to meet your customized needs. Wire Slings Alloy Chain Slings Synthetic High-Performance Roundslings and Wear Pads Synthetic Web Slings and Wear Pads Metal Mesh Slings Synthetic Slings Synthetic Single Path Roundslings Sling Operation & Safety The American Society of Mechanical Engineers (ASME) has issued guidelines for the safe operation and training of personnel when operating slings (B30.9). We provide training in compliance with ASME standards, including product selection requirements, inspection procedures, operating cautions and the effects of environmental and rigging practices. Contractors Supply Overhead Cranes / Jibs Hoists Services Slings Hardware Lifting Securement Cordage Wire Engineered J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) Fall Protection KCI Crane Service Phone:

3 Wire Slings Index General Information Useful Guidelines for the Rigger Wire Sling Inspection Criteria OSHA Sling Tag Requirements Single-Part Body Mechanically Spliced Single-Part Body Mechanically Spliced With Choker Hooks Two-Leg Bridle Mechanically Spliced Three-Leg Bridle Mechanically Spliced Four-Leg Bridle Mechanically Spliced Single-Part Body Hand Spliced Tea Cup Pipe Carrier Mazzella Multi-Part Slings The Mazzella 7-Part Sling Tri-Flex System Gator Max & Gator Laid Braided 6-Part & 8-Part Slings Cable Laid Slings Cable Laid Grommet Strand Laid Grommet Warnings Product Warnings For the complete catalog index, refer to the front of the book. Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE Mazzella Crane Service Phone: CRANE Indusco Wire & Supplies Phone:

4 General Information Wire Slings General Information Wire Slings Every Lift Uses 1 of 3 Basic Hitches VERTICAL, or straight, attachment is simply using a sling to connect a lifting hook to a load. Full rated lifting capacity of the sling may be utilized, but must not be exceeded. A tagline should be used to prevent load rotation, which may damage a sling. When two or more slings are attached to the same lifting hook, the total hitch becomes, in effect, a lifting bridle, and the load is distributed equally among the individual slings. CHOKER hitches reduce lifting capability of a sling since this method of rigging affects ability of the wire rope components to adjust during the lift. A choker is used when the load will not be seriously damaged by the sling body or the sling damaged by the load, and when the lift requires the sling to snug up against the load. The diameter of the bend where the sling contacts the load should keep the point of choke against the sling BODY never against a splice or the base of the eye. When a choke is used at an angle of less than 120 degrees (see next page), the sling-rated capacity must be adjusted downward. A choker hitch should be pulled tight before a lift is made NOT PULLED DOWN DURING THE LIFT. It is also dangerous to use only one choker hitch to lift a load which might shift or slide out of the choke. BASKET hitches distribute a load equally between the two legs of a sling within limitations described above. Angles of Bridles Vertical Choker Basket The horizontal angle of bridles with 3 or more legs is measured the same as the horizontal sling angle of 2-legged hitches. In this case, where a bridle designed with different leg lengths results in horizontal angles, the leg with the smallest horizontal angle will carry the greatest load. Therefore, the smallest horizontal angle is used in calculating actual leg load and evaluating the rated capacity of the sling proposed. Calculating the on Each Leg of a Sling As the included angle between the legs of a sling decreases, the load on each leg increases. The effect is the same whether a single sling is used as a basket or two slings are used with each in a straight pull, as with a 2-legged bridle. Anytime pull is exerted at an angle on a leg or legs of a sling, the load per leg can be determined by using the data in the table above. Proceed as follows to calculate this load and determine the rated capacity required of the sling, or slings, needed for a lift. 1. First, divide the total load to be lifted by the number of legs to be used. This provides the load per leg if the lift were being made with all legs being vertically. 2. Determine the angle between the legs of the sling and the horizontal. 3. Then MULTIPLY the load per leg (as computed above) by the Factor for the leg angle being used (from the table at the bottom) - to compute the ACTUAL LOAD on each leg for this lift and angle. THE ACTUAL LOAD MUST NOT EXCEED THE RATED SLING CAPACITY. Thus, in the above drawing (sling angle at 60 ): = 500 ( Per Leg if a vertical lift) 500 x = 577 lbs. - ACTUAL LOAD on each leg at the 60 included angle being used. In the above drawing (sling angle of 45 ): = 500 ( Per Leg if a vertical lift) 500 x = 707 lbs. = ACTUAL LOAD on each leg at the 45 horizontal angle being used. Leg Angle (Degrees) Factor Overhead Cranes / Jibs Hoists Services Engineered Slings Hardware Lifting Wire Cordage Securement Contractors Supply J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) KCI Crane Service Phone: Fall Protection 183

5 General Information Wire Slings (Continued) Sling Eye Design Sling eyes are designed to provide what amount to "small inverted slings" at the ends of the sling body. Therefore, the width of the eye opening will be affected by the same general forces which apply to legs of a sling rigged as a basket. A sling eye should never be used over a hook or pin with a body diameter larger than the natural width of the eye. Never force an eye onto a hook. On the other hand, the eye should always be used on a hook or pin with at least the nominal diameter of the rope since applying the D/d Ratio shows an efficiency loss of approximately 50% when the relationship is less than 1/1. D/d Ratios Apply to Slings When rigged as a basket, DIAMETER of the bend where a sling contacts the load can be a limiting factor on sling capacity. Standard D/d ratios where "D" is the diameter of bend, and "d" the diameter of the rope are applied to determine efficiency of various sling constructions, as indicated below: Mechanically Spliced, Single-Part Slings: 25 times rope diameter. Hand Spliced, Single-Part Slings: 15 times rope diameter. Braided Multi-Part Slings of 6 Parts: 25 times component rope diameter. Braided Multi-Part Slings of 8 Parts: 25 times component rope diameter. Helically Laid Multi-Part Slings: 25 times component rope diameter. Cable Laid Slings: 10 times sling body diameter. Hand Tucked Grommets & Mechanically Joined Grommets: 5 times sling body diameter. Mazzella 7-Part TM Wire Sling: 10 times component rope diameter. Sling Usage Dictates Sling Body Construction Whether to use a single-part sling (one made of a single wire rope in the sling body) or a multi-part sling (several ropes in the body) is usually the first decision to make after determining the sling length and capacity for a lift. The starting point for this decision involves the handling characteristics of the sling more than any other factor. Based on capacity alone, multi-part slings will be more flexible more easily handled than single-part slings. The larger the capacity of a sling, the more important this becomes to the point, it becomes unrealistic to build big capacity slings from single, very large wire ropes. Multi-part slings provide the only practical means for obtaining extremely heavy lift capacity in hundreds of tons. Various approaches to building multi-part slings have been developed; the most common of these are Braided or Multi-Part. These are described in detail elsewhere in this catalog. Braided, or multi-part, slings are often selected because this construction provides a gripping effect, which reduces load slippage and rotation. In the design of the sling, rope engineers must seek a balance between strength-handling characteristics and number of parts since there is a tendency to lose strength as core parts are added to increase flexibility. Choker Hitch Rated Capacity Adjustment If a load is hanging free, the normal choke angle is approximately 135 degrees. When the angle is less than 135 degrees, an adjustment in the sling-rated capacity must be made. Choker hitches at angles greater than 135 degrees are not recommended since they are unstable. Extreme care should be taken to determine the angle of choke as accurately as possible. In controlled tests, where the angle was less than 120 degrees, the sling body always failed at the point of choke when pulled to destruction. Allowance for this phenomenon must be made anytime a choker hitch is used to shift, turn or control a load, or when the pull is against the choke in a multi-leg lift. Minimum Sling Body Length Angle of Choke (Degrees) For wire rope slings in choker hitch when angle of choke is less than 120. Rated Capacity Percent * Over * Percent of sling rated capacity in a choker hitch. This is the length of wire rope between splices, sleeves or fittings. Generally, the minimum body length is equal to ten (10) times the sling body diameter. This allows approximately one and one half (1-1/2) rope lays between splices. For Multi-part slings, the minimum body length between splices is equal to forty (40) times the component rope diameter. Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE Mazzella Crane Service Phone: CRANE Indusco Wire & Supplies Phone:

6 Useful Guidelines for the Rigger On the following pages are some useful tips to help the rigger do his job more efficiently and safely. Prevailing work rules and government regulations place full responsibility for proper performance upon the rigger, so it is his duty to be familiar with the condition and capability of all tools and equipment used, as well as techniques employed. One basic rule always applies: Always know never guess. Each lift may be divided into three parts, providing a convenient plan for proceeding: 1. The Lifting Device Know its capacity and limitations, and its condition. When was it last inspected? If in doubt about capacity, check the placard. 2. The Hitch Here Is where the rigger can exercise ingenuity but it s also the easiest place to make a mistake. This catalog can help you decide which sling to use, and how to rig it properly. 3. The The weight must be known. But you must also protect the load from possible damage by the slings and protect the slings from damage by the load. Is the lifting device adequate? Check the placard on the crane or hoist, and then answer three questions: 1. Is the capacity adequate for this lift? 2. Will it lift high enough? 3. Is horizontal reach adequate? Check the hook and reeving 1. Are sheaves properly rigged? If multi-part reeving, will it support the load? 2. Is the hook the right size so sling eye won't be distorted when put over the hook? 3. Check for cracks in bowl of the hook, and for evidence of point loading or bending any distortion causing an increase in throat opening of 5%, not to exceed 1/4" (6 mm) or as recommended by the manufacturer (see ASME B Hooks). Type of Hitch Determines Choice of Sling A B C D E F G H I J K L Before you select a sling for a specific lift, determine the most effective hitch to do to the job, protect the load, and protect the sling. One of three basic hitches will usually do the job. The type of hitch you select may determine the type of sling body that will best do the job, as well as the length of sling that will be needed. Lifting height, overhead clearance and hook travel will affect choice of hitch and length of sling. Choose a sling body type which will best support the load while providing adequate rated capacity. The proper choice will provide: 1. Lifting capacity needed. 2. Proper D/d Ratio. 3. Handling characteristics needed for rigging. 4. Minimal damage to the sling. 5. Minimal damage to the load. Protect the sling during the lift with blocking or padding at corners, or where the sling body would be bent severely. A. Vertical Hitch B. Two Leg Vertical Hitch C. Basket Hitch D. Double Basket Hitch E. Inverted Basket Hitch F. Double Wrap Basket Hitch G. Choker Hitch H. Double Wrap Choker Hitch I. Double Inverted Basket Hitch J. Two Leg Bridle K. Three Leg Bridle L. Four Leg Bridle Overhead Cranes / Jibs Hoists Services Engineered Slings Hardware Lifting Wire Cordage Securement Contractors Supply J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) KCI Crane Service Phone: Fall Protection 185

7 Useful Guidelines for the Rigger (Continued) Use a spreader bar between legs of a sling to prevent excessive side pressure on the load by the sling during the lift. Use blocking or padding to protect hollow vessels, loose bundles and fragile items from scuffing and bending. Remember that blocking becomes part of the lift, and must be added to total weight of the sling. When attaching a sling to eye bolts, always pull on line with the bolt axis. When hitching to bolts screwed into or affected to a load, a side pull may break the bolts. When lifting crates or wooden boxes with a basket hitch, be sure load can withstand side pressure as tension is applied to sling. Use spreader bars and corner protectors to prevent damage to contents. Use a shackle in the sling eye during a choke to protect sling body against excessive distortion. Always put shackle pin through sling eye rather than against the sling body since sliding movement of sling body could rotate pin, causing it to come loose. When lifting a bundled load with a single sling near the center of gravity, a choke is more effective than a basket hitch to prevent unbalance and slipping of the load in the sling. A sliding hook choker is superior to a shackle or unprotected eye, since it provides a greater bending radius for the sling body. Some riggers will use a double wrap around the load, for 360 gripping of the load, to prevent slippage during the lift. Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE Mazzella Crane Service Phone: CRANE Indusco Wire & Supplies Phone:

8 Useful Guidelines for the Rigger (Continued) Overhead Cranes / Jibs You can reduce the angle of a choke with a wooden block between the hitch and the load. This also increases the angle between the two legs to improve sling efficiency. Two basket hitches can be rigged with two slings to provide better balance for long loads. Be sure that slings cannot side towards one another along the load when the lift is made. Hoists Services When rigging two or more straight slings as a bridle, select identical sling constructions of identical length with identical previous loading experience. Normal stretch must be the same for paired slings to avoid overloading individual legs and unbalancing the load during the lift. Single-part hand-spliced slings must not be permitted to rotate when rigged in a straight, vertical hitch. Rotation can cause the splice to unlay and pull out, resulting in dropping of the load. : Hand-spliced slings should not be used in lifts where the sling may rotate and cause the rope to unlay. Use an equalizing bar with double-basket hitches to reduce tendency of slings to slide together, and to keep loads level. By adjusting the hook point and using a come-along or chain block to support the heavy end, the load can be kept level during the lift. Proper Use of Cribbing Incorrect Engineered Slings Hardware Lifting Wire Anytime a load is lifted beyond arm s reach with a single-part load line or straight eye-andeye sling, use a tagline to prevent load rotation. If a wire rope is permitted to rotate, the strands may unlay and the rope s capacity will be reduced. Correct Cordage Securement Contractors Supply J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) KCI Crane Service Phone: Fall Protection 187

9 Useful Guidelines for the Rigger (Continued) To turn or reposition a load, either one or two lifting devices may be employed. Always use a choker hitch or a single-leg direct attachment. Never attempt to turn a load with a basket since the load will slide in the hitch against the sling body resulting in damage to both the sling and the load, and possibly a dropped load. One Hook Turning To turn a load with one hook, attach the sling directly to the load ABOVE the Center of Gravity. The lifting hook must be able to move, or travel, in the direction of the turn to prevent sliding of the pivot edge of the load just as the load leaves the ground. It may be necessary to lift the load clear to reposition it after the turn is completed, and irregular shapes sometimes will require blocking for support during and after the turn. Two-hook turning is employed when it is desired to turn the load freely in the air. Main and auxiliary hoists of a crane can often be used, or two cranes can be used. To turn from side (A) to (B) in 1 and 2 on the right, attach on side (B) above the Center of Gravity and on side (D) at the Center of Gravity, then lift both hoists equally until load is suspended. Lower auxiliary until turn is completed; detach sling at (B) before lowering load completely. Turning with double choker gives good control, with weight always applied against a tight sling body and no movement between sling and load. To rig, place both eyes on top of load, pointing opposite direction of turn. Body of sling is then passed under load, through both eyes and over lifting hook. Blocking should be used under load to protect sling and facilitate removal. Lifting unbalanced loads when exact length slings are not available can be accomplished by rigging a choke on the heavy end, as right. Length can be adjusted before weight applies, but once the load comes onto the sling, the hitch is locked in position for the lift. Center of Gravity of a rectangular object with homogeneous characteristics will usually be below the junction of lines drawn diagonally from opposite corners. When a rectangular object has weight concentrated at one end, Center of Gravity will be situated toward that end away from the intersection of diagonal lines. To avoid an unbalanced lift, the lifting hook must be rigged directly above the Center of Gravity. To locate the approximate Center of Gravity of an irregularly shaped article, visualize it enclosed by a rectangle. Where diagonals from opposite corners intersect will usually provide a lift point near the Center of Gravity. To turn from side (B) to (C) in 3 and 4 on the right, lift balanced load at (D) directly above the Center of Gravity; then attach auxiliary at (B) and lift to desired position. Lower both hooks simultaneously until side (C) is in desired position. Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE Mazzella Crane Service Phone: CRANE Indusco Wire & Supplies Phone:

10 Useful Guidelines for the Rigger (Continued) Overturning a heavy object onto cribbing, using one lift hook and chain block. To upend the object, chain block A and the sling B should exchange points. Doglegs, Sets and Kinks When a loop is pulled through, it forms a kink, which permanently deforms a wire rope by freezing or locking wires and strands. This prevents them from sliding and adjusting, and reduces rope strength. The damage is irreparable and the sling should be taken out of service. A dogleg is a set, which occurs when a wire rope sling is pulled down snug against a load. A dogleg usually can be rolled back or turned inside out, and usefulness Dogleg of the sling restored, since strands can still adjust. If the dogleg is severe, the sling must be removed from service. If the dogleg is minor, (exhibiting no strand distortion) and cannot be observed when the rope is under tension, the area of the minor dogleg should be marked for observation and the sling can remain in service. Eye deformation is ordinarily not detrimental to sling strength, as long as there are no broken wires or gross distortion of the lay of strands. An eye has two legs, so it has adequate strength for the load the body can carry. A sling should be retired when distortion locks the strands or flattens the rope in the eye so strands cannot move and adjust. Care of Wire Slings The amount of care and proper maintenance a sling receives will go a long way in determining its service life. Following are guidelines which experience has shown helpful. Storage: Proper storage requires that slings be kept in an area where they will not be exposed to water, extreme heat, or corrosive fumes, liquids, sprays, of being run over or kinked. Kink Eye Deformation Slings should never be left beneath loads or lying wound where they may be damaged. All slings, when not in use, should be kept on a rack. Use of a rack minimizes accidental damage and allows easier monitoring of condition between regular inspections. A rack will also save time by allowing larger slings to be picked up and returned by crane, thereby reducing manhandling. Rigger s Check List 1. Analyze and Measure Determine the total change weight to be moved, as well as exactly how far it is to move and how high it must be lifted. 2. Determine the Hitch Decide how the load is to be connected to the lifting hook, and how the sling will grip or be attached to the load. 3. Select the Sling In addition to adequate Rated Capacity for the angles involved, the sling body should be of the type and style best suited to handling this specific load. Select a sling with proper end attachments or eye protection, as well as attachment hardware, such as clevises. 4. Inspect the Sling Make a good visual check of the sling you select to determine if it is in good condition and capable of making the lift. Refer to prevailing OSHA and ASME regulations for inspection criteria. 5. Rig Up, Not Down Always attach the sling to the load first, then attach it to the hook. 6. Check Everything Before attempting a lift, take a light strain on the rigging, checking to see that blocking, sling and load protection and all safety devices are in place. 7. Stand Clear and Lift Let the lifting device and rigging do the job don t use brute strength to prevent swinging or movement. Use a tagline or tether to control any movement. Keep all hands and toes out from under the load when it is suspended. 8. Don t Jerk Lift slowly and with a steady application of power. 9. Put It Away After you ve completed the job, check the sling for any damage (if it s damaged, red tag it immediately or advise the sling inspector), then return it to the sling storage rack for safekeeping until next usage. Operating Temperatures Steel core slings should never be used at temperatures above 400 F, or below minus 40 F. Wire rope with a steel core should be selected if there is any evidence to suggest that a fiber core will not provide adequate support to the outer strands, and/or if the temperature of the working environment may be expected to exceed 180 F. For operating temperatures above 200 F, de-rating of the minimum breaking force of the rope is necessary (e.g. between 200 F and 400 F reduce by 10%; between 400 F and 600 F reduce by 25%; between 600 F and 800 F reduce by 35%). Do not use ropes with high carbon wires above 800 F. Failure to observe this general guidance could result in failure of the ropes to support the load. For temperatures over 800 F, other materials, such as stainless steel or other special alloys, should be considered. lubricants and any synthetic filling and/or covering materials may become ineffective at certain low or high operating temperature levels. Certain types of rope end terminations also have limiting operating temperatures, and the manufacturer should be consulted where there is any doubt. s with aluminium ferrules must not be used at temperatures in excess of 300 F. Overhead Cranes / Jibs Hoists Services Engineered Slings Hardware Lifting Wire Cordage Securement Contractors Supply J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) KCI Crane Service Phone: Fall Protection 189

11 Wire Sling Inspection Criteria Basic Inspection Criteria For Wire Slings The goal of a sling inspection is to evaluate remaining strength in a sling which has been used previously to determine if it is suitable for continued use. Specific inspection intervals and procedures are required by the Occupational Safety and Health Administration (OSHA) and by ASME B30.9 standards, and the responsibility for performance of inspections is placed squarely upon the sling user by Federal Legislation. As a starting point, the same work practices which apply to all "working" wire rope apply to wire rope which has been fabricated into a sling. Therefore, a good working knowledge of wire rope design and construction will be not only useful, but essential in conducting a wire rope sling inspection. But because wire rope is a rather complex machine, no precise rules can be given to determine exactly when a wire rope sling should be replaced. There are many variables, and all must be considered. ASME standards specify that a wire rope sling shall be removed from service immediately if any of the following conditions are present: 1. Broken Wires: For strand-laid grommets and single-part slings, ten randomly distributed broken wires in one rope lay, or five broken wires in one strand in one rope lay. For cable laid, cable laid grommets and multi-part slings, use the following: Sling Body Allowable Broken Wires Per Lay or One Braid Allowable Strands Per Sling Less than 8 Part Braid 20 1 Cable Laid Part or Greater Braid Distortion: Kinking, crushing, birdcaging or other damage which distorts the rope structure. The main thing to look for is wires or strands that are pushed out of their original positions in the rope. 3. Heat Damage: Any metallic discoloration, fusing of wires or loss of internal lubricant caused by exposure to heat. 4. Damaged End Attachments: Cracked, bent or broken end fittings caused by abuse, wear or damage. 5. Bent Hooks: No more than 5 percent over the normal throat openings, measured at the narrowest point from the plane of the unbent hook (see ASME B30.10 Hooks). 6. Corrosion: Severe corrosion of the rope or end attachments which has caused pitting or binding of wires should be cause for replacing the sling. Light surface rust does not substantially affect strength of a sling. 7. Pulled Eye Splices: Any evidence that eye splices have slipped, tucked strands have moved or pressed sleeves show serious damage may be sufficient cause to reject a sling. 8. Unbalance: A very common cause of damage is the kink which results from pulling through a loop while using a sling, thus causing wires and strands to be deformed and pushed out of their original position. This unbalances the sling, reducing its strength. 9. Kinks: Are tightened loops with permanent strand distortion that result from improper handling when a rope is being installed or while in service. A kink happens when a loop is permitted to form and then is pulled down tight, causing permanent distortion of the strands. The damage is irreparable and the sling must be taken out of service. 10. Doglegs: Are permanent bends caused by improper use or handling. If the dogleg is severe, the sling must be removed from service. If the dogleg is minor, (exhibiting no strand distortion) and cannot be observed when the sling is under tension, the area of the minor dogleg should be marked for observation and the sling can remain in service. Disposition of Retired Slings The best inspection program available is of no value if slings, which are worn out and have been retired, are not disposed of properly. When it is determined by the inspector that a sling is worn out or damaged beyond use, it should be tagged immediately DO NOT USE. This sling should then be destroyed as soon as possible by cutting the eye and fittings from the rope with a torch. This will help assure that an employee will not mistakenly use a sling which has been retired from service. Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE Mazzella Crane Service Phone: CRANE Indusco Wire & Supplies Phone:

12 Wire Sling Inspection Criteria (Continued) Federal Work Rules Require Specific Inspection Intervals Government regulations are specific on when to inspect. Both ASME Standard B30.9 and OSHA require that wire rope slings receive two types of inspections: a daily visual inspection, and additional inspections where service conditions warrant. Daily visual inspections are intended to detect serious damage or deterioration which would weaken the sling. This inspection is usually performed by the person using the sling in a day-to-day job. The user should look for obvious things, such as broken wires, kinks, crushing, broken attachments, severe corrosion, etc. Additional inspections should be performed at regular intervals based on, (1) frequency of sling use, (2) severity of service conditions. (3) nature of lifts and (4) prior experience based on service life of slings used in similar circumstances. It is required that these additional inspections be carried out by a designated person who must have good knowledge of wire rope. An accurately written and dated record of all conditions observed shall be maintained. Any deterioration of the sling which could result in appreciable loss of original strength should be carefully noted and determination made on whether further use would constitute a safety hazard. WRTB Technical Bulletin: Guidelines on Strand Clearance in the Eyes of Wire Slings When an eye is formed in a sling, the rope is formed into a relatively sharp bend to form the eye. This bend increases the clearance between the strands on the outside of the eye and, in some cases, this clearance accumulates between two strands. This is not a reason for concern in a new sling, and the sling is acceptable for use. During the initial and subsequent loadings, this clearance between strands, and position of the strands in the eye of the sling, may change. The condition of all slings must be evaluated in accordance with ASME B30.9, or other applicable standards or regulations, in order to determine the suitability for continued use. How to Inspect Precisely how to make proper, adequate inspections is not detailed by OSHA yet it is in the knowledge of the inspector that the big difference between a good inspection and something less becomes apparent. Inspection should follow a systematic procedure: 1. First, it is necessary that all parts of the sling are readily visible. The sling should be laid out so every part is accessible. 2. Next, the sling should be sufficiently cleaned of dirt and grease so wires and fittings are easily seen. This can usually be accomplished with a wire brush or rags. 3. The sling should then be given a thorough, systematic examination throughout its entire length, paying particular attention to sections showing the most wear. 4. Special attention should also be paid to fittings and end attachments, and areas of the sling adjacent to these fittings. 5. When the worst section of a sling has been located, this area should then be carefully checked against the OSHA and ASME criteria. 6. Label or identify slings that are inspected. 7. Keep records of inspections that include dates and corresponding conditions of slings. 8. Dispose immediately of slings that are rejected. A knowledgeable inspector will also insist on proper storage for out-of-use slings to make his job easier, if not for the good of the slings. Inspections are much easier and probably more thorough when slings are available for inspection in an orderly arrangement, out of the weather and away from heat and dirt. Lubrication Like any other machine, wire rope is thoroughly lubricated at time of manufacture. Normally, for sling use under ordinary conditions, no additional lubrication is required. However, if a sling is stored outside or in an environment which would cause corrosion, lubrication should be applied during the service life to prevent rusting or corroding. If lubrication is indicated, the same type lubrication applied during manufacture should be used. Your sling manufacturer can provide information on the type of lubricant to be used and best method of application. Overhead Cranes / Jibs Hoists Services Engineered Slings Hardware Lifting Wire Cordage Securement Contractors Supply J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) KCI Crane Service Phone: Fall Protection 191

13 OSHA Sling Tag Requirements Employers must use only slings that have permanently affixed and legible identification markings (tags) as prescribed by the manufacturer, and that indicate the recommended safe working load for the type(s) of hitch(es) used, the angle upon which it is based, and the number of legs, if more than one. All Mazzella Companies slings will have legible identification tags (sample wire rope sling tag above). In addition, OSHA is requiring that, in using the sling, employers follow the safe working load capacity information on the identification markings affixed to slings by the sling manufacturer. Further, if the sling is missing its identification marking, consistent with the latest ASME / ANSI B30.9 standard, employers must remove the sling from service until they reaffix the identification markings. OSHA has updated its standards regulating slings for general industry ( ) and construction ( ). This final rule became effective on July 8, In summary, the new changes include: Removing all the load capacity tables for slings that were in the previous OSHA standards Sling Markings Employers now must use only slings with permanently affixed identification markings that show the maximum load capacity for each sling. Shackle Markings The final rule also provides similar protection for shackles, requiring them to also show rated capacity. In the past, some companies did not require the wire rope slings being used at their sites to be marked with a tag and/or rated capacity and based on the original OSHA 1910 regulations, it wasn t required. Now, with this change, ALL wire rope slings must be marked no exceptions! The load capacity tables previously designated in these OSHA standards, were based on the 1971 ASME / ANSI B30.9 standard, are now obsolete and no longer conform to the load capacity tables of the updated B30.9 industry standards. The outdated tables are being replaced with a requirement that prohibits employers from loading slings in excess of the recommended safe working load as shown on the permanently affixed identification markings. Basically, this revision prohibits the use of any sling that does not have a permanently affixed identification tag. Sling Identification Requirements Each sling shall be marked to show: A. Name or trademark of manufacturer; B. Rated loads for the type(s) of hitch(es) used and the angle upon which it is based; C. Diameter or size D. Number of legs, if more than one Sling identification shall be done by the sling manufacturer. Sling identification should be maintained by the user so as to be legible during the life of the sling. We place a unique identifier / serial number on all the slings we manufacture. Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE Mazzella Crane Service Phone: CRANE Indusco Wire & Supplies Phone:

14 Single-Part Body Mechanically Spliced Slings Eyes are formed using the flemish eye splice. Ends are secured by pressing a metal sleeve over the ends of the strands of the splice. Pull is directly along the centerline of rope and eye. Gives most efficient use of rope capacity and is economical. SEE INFORMATION ON PAGES Overhead Cranes / Jibs Hoists Swaging Provides Positive Grip This cutaway of a metal sleeve strands, swaged onto a splice shows how metal flows into valleys between strands to positively prevent ends from unlaying when sling is used within its rated capacity. Flemish Eye Splice In the standard flemish eye mechanical splice, rope is separated into two parts 3 adjacent strands, and 3 adjacent strands and core. These two parts are then re-laid back in opposite directions to form an eye, and ends are secured with a swaged metal sleeve. 6 x 36 IWRC 6 x 19 IWRC Diameter (inches) Vertical ** Choker Hitch Rated Capacity Tons * Basket Hitch E-E E-HT E-EH Minimum Sling Length (When Using Standard Eyes) Standard Eye Size (inches) W x L Thimble Eye Size (inches) W x L 1/ ' 6" 2 x 4 7/8 x 1-5/8 3/4 5/ ' 9" 2-1/2 x 5 1-1/16 x 1-7/8 1 3/ ' 3 x 6 1-1/8 x 2-1/8 1-1/2 7/ ' 3" 3-1/2 x 7 1-1/4 x 2-1/4 2 1/ ' 6" 4 x 8 1-1/2 x 2-3/4 3 9/ ' 9" 4-1/2 x 9 1-1/2 x 2-3/4 3 5/ ' 5 x /4 x 3-1/4 5 3/ ' 6" 6 x 12 2 x 3-3/4 5 7/ ' 7 x /4 x 4-1/4 7-1/ ' 6" 8 x /2 x 4-1/ / ' 9 x /8 x 5-1/ / ' 6" 10 x /8 x 5-1/ / ' 11 x /2 x 6-1/ / ' 12 x /2 x 6-1/4 AH / ' 13 x /2 x 6-1/4 AH / ' 14 x 28 4 x 8 AH ' 16 x /2 x 9 AH / ' 18 x 36 6 x 12 AH / ' 20 x 40 7 x 14 AH / ' 22 x ' 24 x / ' 28 x 56 Eye Hook Cap. Tons Services Engineered Slings Hardware Lifting Wire Cordage Securement * Rated Capacities Basket Hitch based on D/d Ratio of 25. Rated Capacities based on pin diameter no larger than natural eye width or less than the nominal sling diameter. Rated Capacities based on design factor of 5. ** See Choker Hitch Rated Capacity Adjustment. Sling angles less than 30 degrees shall not be used. Above capacities based on EIP rope. Contractors Supply J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) KCI Crane Service Phone: Fall Protection 193

15 Single-Part Body Mechanically Spliced Slings with Choker Hooks SEE INFORMATION ON PAGES All wire rope diameters in inches. All capacities in tons of 2,000 lbs. All eye and fitting dimensions in inches. Diameter 6 x 19 IWRC 6 x 36 IWRC Min. Sling Length When Using Std. Eyes Rated Capacity Tons * Eye Slip-Thru Thimble Dimensions Dimensions Number A B L W 1/4 1' 6" W-2 4-1/8 2-1/8 5/16 1' 9" /2 5 W-2 4-1/8 2-1/8 3/8 2' 0" W-2 4-1/8 2-1/8 7/16 2' 3" /2 7 W-3 4-3/8 2-3/8 1/2 2' 6" W-3 4-3/8 2-3/8 9/16 2' 9" /2 9 W-3 4-3/8 2-3/8 5/8 3' 0" W-4 6-5/8 3-3/8 3/4 3' 6" W-4 6-5/8 3-3/8 7/8 4' 0" W-5 7-1/8 3-3/4 1 4' 6" W-5 7-1/8 3-3/4 1-1/8 5' 0" W-6 8-3/8 4-3/8 1-1/4 5' 6" W-6 8-3/8 4-3/8 1-3/8 6' 0" W-7 9-1/ /2 7' 0" W-7 9-1/2 5 Diameter 6 x 19 IWRC 6 x 36 IWRC Min. Sling Length When Using Std. Eyes Rated Capacity Tons * 2-Leg Choker Hitch *** Alloy Oblong Link D L W /4 1' 6" / /2 5/16 1' 9" / /8 2' 0" /4 5-1/2 2-3/4 7/16 2' 3" / /2 2' 6" /4 5-1/2 2-3/4 9/16 2' 9" /8 3' 0" /4 3' 6" /8 4' 0" /4 8-3/4 4-3/8 1 4' 6" /4 8-3/4 4-3/8 1-1/8 5' 0" / /4 5' 6" / /8 6' 0" / /2 7' 0" * Rated Capacities Basket Hitch based on D/d ratio of 25. Rated Capacities based on pin diameter no larger than natural eye width or less than the nominal sling diameter. Rated Capacities based on design factor of 5. Sling angles less than 30 shall not be used. *** See Choker Hitch Rated Capacity Adjustment. Rated Capacity for two-legged bridles, whether used as chokers or with hooks or other end fixtures, is affected by rigging angles, the same as straight slings in basket hitches. Note: Reduction in rated capacity as legs spread to wider lifting connections. Mazzella Lifting Technologies Phone: Progressive Crane Phone: CRANE Mazzella Crane Service Phone: CRANE Indusco Wire & Supplies Phone:

16 Two-Leg Bridle Mechanically Spliced Slings Multi-legged bridles with two, three or four straight legs are offered with plain eyes, thimble eyes, open or closed sockets, shackles and turnbuckles. If required, rings or carbon pear links can be supplied rather than the oblong-shaped links. SEE INFORMATION ON PAGES Overhead Cranes / Jibs Hoists All wire rope diameters in inches. All capacities in tons of 2,000 lbs. All eye and fitting dimensions in inches. Diameter 6 x 19 IWRC 6 x 36 IWRC Min. Sling Length When Using Std. Eyes Rated Capacity Tons * 2-Leg Choker Hitch *** Alloy Oblong Link Hook D L W WLL ** E R 1/4 1' 3" / /2 3/ /16 1' 6" / /8 1' 8" /4 5-1/2 2-3/4 1-1/ /16 1' 10" / /2 2' 0" /4 5-1/2 2-3/ /16 2' 2" /8 2' 4" /4 2' 9" /8 3' 3" /4 8-3/4 4-3/ ' 6" /4 8-3/4 4-3/ /8 4' 0" / /4 4' 6" / /8 5' 0" / /2 5' 6" /4 9' / ' / Services Engineered Slings Hardware Lifting * Rated Capacities Basket Hitch based on D/d ratio of 25. Rated Capacities based on pin diameter no larger than natural eye width or less than the nominal sling diameter. Rated Capacities based on design factor of 5. Sling angles less than 30 shall not be used. ** Limit. Rated Capacity for two-legged bridles, whether used as chokers or with hooks or other end fixtures, is affected by rigging angles, the same as straight slings in basket hitches. Wire Contractors Supply Cordage Note: Reduction in rated capacity as legs spread to wider lifting connections. Securement J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) KCI Crane Service Fall Protection Phone:

17 Three-Leg Bridle Mechanically Spliced Slings All wire rope diameters in inches. All capacities in tons of 2,000 lbs. All eye and fitting dimensions in inches. SEE INFORMATION ON PAGES Diameter 6 x 19 IWRC 6 x 36 IWRC Min. Sling Length When Using Std. Eyes Rated Capacity Tons * Alloy Oblong Link D L W WLL ** Hook Carbon Pear Link E R D A B C 1/4 1' 3" / /2 3/4 15/ / /2 2-1/2 5/16 1' 6" / / / / /8 1' 8" / /2 1-1/ /4 5-1/2 2-3/4 2-3/4 7/16 1' 10" / / / /2 2' 0" / / /4 5-1/2 2-3/4 2-3/4 9/16 2' 2" / /8 2' 4" / /4 2' 9" / / /8 3' 3" / /2 7-1/2 2-1/ ' 6" / / / /8 4' 0" / / /4 4' 6" / /8 5' 0" / / /2 5' 6" / AH / /8 8' / AH /6 1-3/4 9' / AH /4 18-5/16 Four-Leg Bridle Mechanically Spliced Slings All wire rope diameters in inches. All capacities in tons of 2,000 lbs. All eye and fitting dimensions in inches. SEE INFORMATION ON PAGES Diameter 6 x 19 IWRC 6 x 36 IWRC Min. Sling Length When Using Std. Eyes Rated Capacity Tons * Alloy Oblong Link Hook D L W WLL ** E R 1/4 1' 3" / /2 3/ /16 1' 6" / /8 1' 8" / / /16 1' 10" / /2 2' 0" /16 2' 2" /4 8-3/ /8 2' 4" /4 8-3/ /4 2' 9" /2 11-1/ /8 3' 3" / ' 6" /8 4' 0" / /4 4' 6" * Rated Capacities Basket Hitch based on D/d ratio of 25. ** Limit. Rated Capacities based on pin diameter no larger than natural eye width or less than the nominal sling diameter. Sling angles less than 30 shall not be used. Sling angles in this catalog depart from the traditional method of vertical angles measured at the sling hook. It has long been the opinion of sling users that it is easier to measure a sling angle relative to the ground or horizontal. The method is the same whichever angle is used. When the horizontal angle is used you, must use the trigonometric cosine of the vertical angle. Mazzella Lifting Technologies Progressive Crane Mazzella Crane Service Indusco Wire & Supplies Phone: Phone: CRANE Phone: CRANE Phone:

18 Single-Part Body Hand Splice The end of a single wire rope is bent back along the rope to form the eye, and strands are hand-tucked into the body of the rope in what is called a burnt end splice. With Burnt End splices, the ends of strands are left exposed and cut off with a torch. Upon special request, a premium splice known as a tapered and concealed splice can be provided. Slings with rope bodies larger than 1" diameter are made only with Burnt End splices. All have the same rated capacity, size for size. Hand Spliced Eye The tapered and concealed splice utilizes tension in the rope body to secure strands where they are tucked back into the rope. Needs no metal sleeve to assure firm anchoring. When "tapered" and "concealed", ends of strands are tucked inward and concealed inside the rope. E-E E-HT E-EH SEE INFORMATION ON PAGES Tapered & Concealed Burnt End Overhead Cranes / Jibs Hoists Services Engineered Slings Hand-spliced slings should not be used in lifts where the sling may rotate and cause the wire rope to unlay. All capacities in tons of 2,000 lbs. All eye and fitting dimensions in inches. Hardware 6 x 36 FC 6 x 19 FC Diameter (inches) Min. Sling Length When Using Std. Eyes Vertical *** Choker Hitch * Rated Capacities Basket Hitch based on D/d Ratio of 15. Rated Capacities based on pin diameter no larger than natural eye width or less than the nominal sling diameter. Rated Capacities based on design factor of 5. Sling angles of less than 30 degrees shall not be used. Rated Capacity Tons * Basket Hitch Eye Dimensions ** limit. *** See Choker Hitch Rated Capacity Adjustment. Thimble A B A B /4 2' 0" /8 1-5/8 3/4 15/16 3-7/32 5/16 2' 3" / /16 1-7/ / /32 3/8 2' 6" /8 2-1/8 1-1/2 1-1/16 4-3/32 7/16 2' 9" / /4 2-1/4 1-1/2 1-1/16 4-3/32 1/2 3' 0" /2 2-3/ / /16 9/16 3' 6" / /2 2-3/ /2 5-3/4 5/8 4' 0" /4 3-1/ /2 5-3/4 3/4 4' 6" / /8 7-3/8 7/8 5' 6" / /4 4-1/4 7-1/2 2-1/4 9-1/16 1 6' 0" /2 4-1/2 7-1/2 2-1/4 9-1/16 1-1/8 6" 6" / /8 5-1/ /2 10-1/16 1-1/4 7' 9" /8 5-1/ /2 10-1/16 1-3/8 9' 0" / /2 6-1/ /8 12-1/2 1-1/2 10' 0" /2 6-1/ /8 12-1/2 ** WLL Hook E R Lifting Wire Cordage Securement Contractors Supply J Henry Holland Phone: Alabama Sling Center Phone: Tennessee Sling Center Phone: (Memphis) Phone: (Chattanooga) KCI Crane Service Phone: Fall Protection 197