OSHA Standard Slings Compliments of the Columbus McKinnon Corporation

Transcription

1 OSHA Standard Slings Compliments of the Columbus McKinnon Corporation

2 (a) Scope. This section applies to slings used in conjunction with other material handling equipment for the movement of material by hoisting, in employments covered by this part. The types of slings covered are those made from alloy steel chain, wire rope, metal mesh, natural or synthetic fiberr rope (conventional three strand construction), and synthetic web (nylon, polyester, and polypropylene). Overall Length Bearing point to Bearing point Fabric (b) Definitions. Angle of loading is the inclination of a leg or branch of a sling measured from the horizontal or vertical plane as shown in Fig. N ; provided that an angle of loading of five degrees or less from the vertical may be considered a vertical angle of loading. Basket hitch is a sling configuration whereby the sling is passed under the load and has both ends, end attachments, eyes or handles on the hook or a single master link. Male Handle Eye Sling Width Fig N Metal Mesh Sling Female Handle Braided wire ropes. rope is a wire rope formed by plaiting component wire Bridle wire rope sling is a sling composed of multiple wire rope legs with the top ends gathered in a fitting that goes over the lifting hook. Cross Rods Spiral Cable laid endless sling-mechanical joint is a wire rope sling made endless by joining the ends of a single length of cable laid rope with one or more metallic fittings. Cable laid grommet-hand tucked is an endless wire rope sling made from one length of rope wrapped six times around a core formed by hand tucking the ends of the rope inside the six wraps. Cable laid rope is a wire rope composed of six wire ropes wrapped around a fiberr or wire rope core. Cable laid rope sling-mechanical joint is a wire rope sling made from a cable laid rope with eyes fabricated by pressing or swaging one or more metal sleeves over the rope junction. Spiral welded or brazed to cross rods Fig N Metal Mesh Construction Choker hitchh is a sling configuration with one end of the sling passing underr the load and through an end attachment, handle or eye on the other end of the sling. Coating is an elastomer or other suitable material applied to a sling or to a sling component to impart desirable properties. Master Link Master Coupling Link Coupling Link Cross rod is a wire used to join spirals of metal mesh to form a complete fabric. (See Fig. N ) ID Tag Designated means selected or assigned by the employer or the employer's representative as being qualified to perform specific duties. Equivalent entity is a person orr organization (including an employer) which, by possession of equipment, technical knowledge and skills, can perform with equal competence the same repairs and tests as the person or organization with which it is equated. Chain Coupling Link Fabric (metall mesh) is the flexible portion of a metal mesh sling consisting of a series of transverse coils and cross rods. Female handle (choker) is a handle with a handle eye and a slot of such dimension as to permit passage of a male handle thereby allowing the use of a metal mesh sling in a choker hitch. (See Fig. N ) Handle is a terminal fitting to which metal mesh fabric is attached. (See Fig. N ) Handle eye is an opening in a handle of a metal mesh sling shaped to accept a hook, shackle or other lifting device. (See Fig. N ) Hitch is a sling configuration whereby the sling is fastened to an object or load, either directly to itt or around it. Link is a single ring of a chain. Sling Hook Fig N Major Components of a Quad Chain Sling Master coupling link is an alloy steel welded coupling link used as an intermediate link to join alloy steel chain to master links. (See Fig. N ) Master link or gatheringg ring is a forged or welded steel link used to support all members (legs) of an alloy steel chain sling or wire rope sling. (See Fig. N ) Mechanical coupling link is a non-welded, mechanically closed steel link used to attach master links, hooks, etc., to alloy steel chain. Male handle (triangle) is a handle with a handle eye.

3 FIGURE N METAL MESH SLING (TYPICAL) (For Figure N-184-1) FIGURE N METAL MESH CONSTRUCTION (For Figure N-184-2) FIGURE N MAJOR COMPONENTS OF A QUADRUPLE SLING (For Figure N-184-3) Proof load is the load applied in performance of a proof test. Proof test is a nondestructive tension test performed by the sling manufacturer or an equivalent entity to verify construction and workmanship of a sling. Rated capacity or working load limit is the maximum working load permitted by the provisions of this section. Reach is the effective length of an alloy steel chain sling measured from the top bearing surface of the upper terminal component to the bottom bearing surface of the lower terminal component. Selvage edge is the finished edge of synthetic webbing designed to prevent unraveling. Sling is an assembly which connects the load to the material handling equipment. Sling manufacturer is a person or organization that assembles sling components into their final form for sale to users. Spiral is a single transverse coil that is the basic element from which metal mesh is fabricated. (See Fig. N ) Strand laid endless sling-mechanical joint is a wire rope sling made endless from one length of rope with the ends joined by one or more metallic fittings. Strand laid grommet-hand tucked is an endless wire rope sling made from one length of strand wrapped six times around a core formed by hand tucking the ends of the strand inside the six wraps. Strand laid rope is a wire rope made with strands (usually six or eight) wrapped around a fiber core, wire strand core, or independent wire rope core (IWRC). Vertical hitch is a method of supporting a load by a single, vertical part or leg of the sling. (See Fig. N ) (c) Safe operating practices. Whenever any sling is used, the following practices shall be observed: (c)(1) Slings that are damaged or defective shall not be used (c)(2) Slings shall not be shortened with knots or bolts or other makeshift devices (c)(3) Sling legs shall not be kinked (c)(4) Slings shall not be loaded in excess of their rated capacities (c)(5) Slings used in a basket hitch shall have the loads balanced to prevent slippage (c)(6) Slings shall be securely attached to their loads (c)(7) Slings shall be padded or protected from the sharp edges of their loads (c)(8) Suspended loads shall be kept clear of all obstructions (c)(9) All employees shall be kept clear of loads about to be lifted and of suspended loads (c)(10) Hands or fingers shall not be placed between the sling and its load while the sling is being tightened around the load (c)(11) Shock loading is prohibited (c)(12) A sling shall not be pulled from under a load when the load is resting on the sling (c)(13) Employers must not load a sling in excess of its recommended safe working load as prescribed by the sling manufacturer on the identification markings permanently affixed to the sling (c)(14) Employers must not use slings without affixed and legible identification markings (d) Inspections. Each day before being used, the sling and all fastenings and attachments shall be inspected for damage or defects by a competent person designated by the employer. Additional inspections shall be performed during sling use, where service conditions warrant. Damaged or defective slings shall be immediately removed from service (e) Alloy steel chain slings (e)(1) Sling identification. Alloy steel chain slings shall have permanently affixed durable identification stating size, grade, rated capacity, and reach (e)(2) Attachments (e)(2)(i) Hooks, rings, oblong links, pear shaped links, welded or mechanical coupling links or other attachments shall have a rated capacity at least equal to that of the alloy steel chain with which they are used or the sling shall not be used in excess of the rated capacity of the weakest component (e)(2)(ii) Makeshift links or fasteners formed from bolts or rods, or other such attachments, shall not be used (e)(3) Inspections (e)(3)(i) In addition to the inspection required by paragraph (d) of this section, a thorough periodic inspection of alloy steel chain slings in use shall be made on a regular basis, to be determined on the basis of (A) frequency of sling use; (B) severity of service conditions; (C) nature of lifts being made; and (D) experience gained on the service life of slings used in similar circumstances. Such inspections shall in no event be at intervals greater than once every 12 months (e)(3)(ii) The employer shall make and maintain a record of the most recent month in which each alloy steel chain sling was thoroughly inspected, and shall make such record available for examination (e)(3)(iii) The thorough inspection of alloy steel chain slings shall be performed by a competent person designated by the employer, and shall include a thorough inspection for wear, defective welds, deformation and increase in length. Where such defects or deterioration are present, the sling shall be immediately removed from service (e)(4) Proof testing. The employer shall ensure that before use, each new, repaired, or reconditioned alloy steel chain sling, including all welded components in the sling assembly, shall be proof tested by the sling manufacturer or equivalent entity, in accordance with paragraph 5.2 of the American Society of Testing and Materials Specification A391-65, which is incorporated by reference as specified in Sec (ANSI G ). The employer shall retain a certificate of the proof test and shall make it available for examination (e)(5) [Reserved] (e)(6) Safe operating temperatures. Employers must permanently remove an alloy steel-chain slings from service if it is heated above 1000 degrees F. When exposed to service temperatures in excess of 600 degrees F, employers must reduce the maximum working-load limits permitted by the chain manufacturer in accordance with the chain or sling manufacturer's recommendations.

4 (e) Alloy steel chain slings. cont (e)(7) Repairing and reconditioning alloy steel chain slings (e)(7)(i) Worn or damaged alloy steel chain slings or attachments shall not be used until repaired. When welding or heat testing is performed, slings shall not be used unless repaired, reconditioned and proof tested by the sling manufacturer or an equivalent entity (e)(7)(ii) Mechanical coupling links or low carbon steel repair links shall not be used to repair broken lengths of chain (e)(8) Effect of wear. If the chain size at any point of the link is less than that stated in Table N-184-1, the employer must remove the chain from service (e)(9) Deformed attachments (e)(9)(i) Alloy steel chain slings with cracked or deformed master links, coupling links or other components shall be removed from service. TABLE N MINIMUM ALLOWABLE CHAIN SIZE AT ANY POINT OF LINK Chain Size, Inches Minimum allowable chain size, inches ¼ 13/64 3/8 19/64 ½ 25/64 5/8 31/64 ¾ 19/32 7/8 45/ /16 1 1/8 29/32 1 ¼ 1 1 3/8 1 3/32 1 ½ 1 3/16 1 3/4 1 13/ (e)(9)(ii) Slings shall be removed from service if hooks are cracked, have been opened more than 15 percent of the normal throat opening measured at the narrowest point or twisted more than 10 degrees from the plane of the unbent hook (f) Wire-rope sling (f)(1) Sling use. Employers must use only wire-rope slings that have permanently affixed and legible identification markings 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 (f)(2) Minimum sling lengths (f)(2)(i) Cable laid and 6x19 and 6x37 slings shall have a minimum clear length of wire rope 10 times the component rope diameter between splices, sleeves or end fittings (f)(2)(ii) Braided slings shall have a minimum clear length of wire rope 40 times the component rope diameter between the loops or end fittings (f)(2)(iii) Cable laid grommets, strand laid grommets and endless slings shall have a minimum circumferential length of 96 times their body diameter (f)(3) Safe operating temperatures.fiber core wire rope slings of all grades shall be permanently removed from service if they are exposed to temperatures in excess of 200 deg. F. When nonfiber core wire rope slings of any grade are used at temperatures above 400 deg. F or below minus 60 deg. F, recommendations of the sling manufacturer regarding use at that temperature shall be followed (f)(4) End attachments (f)(4)(i) Welding of end attachments, except covers to thimbles, shall be performed prior to the assembly of the sling (f)(4)(ii) All welded end attachments shall not be used unless proof tested by the manufacturer or equivalent entity at twice their rated capacity prior to initial use. The employer shall retain a certificate of the proof test, and make it available for examination (f)(5) Removal from service. Wire rope slings shall be immediately removed from service if any of the following conditions are present: (f)(5)(i) Ten randomly distributed broken wires in one rope lay, or five broken wires in one strand in one rope lay (f)(5)(ii) Wear or scraping of one-third the original diameter of outside individual wires (f)(5)(iii) Kinking, crushing, bird caging or any other damage resulting in distortion of the wire rope structure (f)(5)(iv) Evidence of heat damage (f)(5)(v) End attachments that are cracked, deformed or worn (f)(5)(vi) Hooks that have been opened more than 15 percent of the normal throat opening measured at the narrowest point or twisted more than 10 degrees from the plane of the unbent hook (f)(5)(vii) Corrosion of the rope or end attachments (g) Metal mesh slings (g)(1) Sling marking. Each metal mesh sling shall have permanently affixed to it a durable marking that states the rated capacity for vertical basket hitch and choker hitch loadings (g)(2) Handles. Handles shall have a rated capacity at least equal to the metal fabric and exhibit no deformation after proof testing (g)(3) Attachments of handles to fabric. The fabric and handles shall be joined so that: (g)(3)(i) The rated capacity of the sling is not reduced (g)(3)(ii) The load is evenly distributed across the width of the fabric (g)(3)(iii) Sharp edges will not damage the fabric (g)(4) Sling coatings. Coatings which diminish the rated capacity of a sling shall not be applied (g)(5) Sling testing. All new and repaired metal mesh slings, including handles, shall not be used unless proof tested by the manufacturer or equivalent entity at a minimum of 1 1/2 times their rated capacity. Elastomer impregnated slings shall be proof tested before coating (g)(6) [Reserved] (g)(7) Safe operating temperatures. Metal mesh slings which are not impregnated with elastomers may be used in a temperature range from minus 20 deg. F to plus 550 deg. F without decreasing the working load limit. Metal mesh slings impregnated with polyvinyl chloride or neoprene may be used only in a temperature range from zero degrees to plus 200 deg. F. For operations outside these temperature ranges or for metal mesh slings impregnated with other materials, the sling manufacturer's recommendations shall be followed.

5 (g) Metal mesh slings cont (g) )(8) Repairs (g)(8)(i) Metal mesh slings which are repaired shall not be used unless repaired by a metal mesh sling manufacturer or an equivalent entity (g)(8)(ii) Once repaired, each sling shall be permanently marked or tagged, or a written record maintained, to indicate the date and nature of the repairs and the person or organization that performed the repairs. Records of repairs shall be made available for examination (g) )(9) Removal from service. Metal mesh slings shall be immediately removed from service if any of the following conditions are present: (g)(9)(i) A broken weld or broken brazed joint along the sling edge (g)(9)(ii) Reduction in wire diameter of 25 per cent due to abrasion or 15 per cent due to corrosion (g)(9)(iii) Lack of flexibility due to distortion of the fabric (g)(9)(iv) Distortion of the female handle so that the depth of the slot is increased more than 10 per cent (g)(9)(v) Distortion of either handle so that the width of the eye is decreased more than 10 per cent (g)(9)(vi) A 15 percent reduction r of the original cross sectional area of metal at any point around the handle eye (g)(9)(vii) Distortion of either handle out of its plane (h) Natural and synthetic fiber-rope slings (h) )(1) Sling use. Employers must use natural and synthetic fiber-rope slings that have permanently affixed and legible identification i markings stating the rated capacity for the type(s) of hitch(es) used and the angle upon which it is based, type of fiber material, and the number of legs if more than one (h)(1)(i) Fiber rope slings made from conventional three strand construction fiber rope shall not be used with loads in excess of the rated capacities prescribed in Tables N through N (h)(1)(ii) Fiber rope slings shall have a diameter of curvature meeting at least the minimums specified in Figs. N and N (h)(1)(iii) Slings not included in these tables shall be used only in accordance with the manufacturer's recommendations. FIGURE N Basicc Sling Configurations with Vertical Legs FIGURE N Basic Sling Configurations with Angled Legs FIGURE N Note: For vertical angles of 50 or less, referr to Figuree N Basic Sling Configurations with Vertical Legs. See Figure N for explanation of symbols

6 (h) Natural and synthetic fiber-rope slings cont (h)(2) Safe operating temperatures. Natural and synthetic fiber rope slings, except for wet frozen slings, may be used in a temperature range from minus 20 deg. F to plus 180 deg. F without decreasing the working load limit. For operations outside this temperature range and for wet frozen slings, the sling manufacturer' s recommendations shall be followed (h)(3) Splicing. Spliced fiber rope r slings shall not be used unless they have been spliced in accordance with the following minimum requirements and in accordance with any additional recommendations of the manufacturer: : (h)(3)(i) In manila rope, eye splices shall consist of at least three full tucks, and short splices shall consist off at least six full tucks, three on each side of the splice center line (h)(3)(ii) In synthetic fiber rope, eye splices shall consist of at least four full tucks, and short splices shall consist of at least eight full tucks, four on each side of the center line (h)(3)(iii) Strand end tails shall not be trimmed flush with the surface of the rope immediately adjacent to the full tucks. This applies to all types of fiber rope and both eye and short splices. For fiber rope under one inch in diameter, the tail shall project at least six rope diameters beyond the last full tuck. For fiber rope one inch in diameter and larger, the tail shall project at least six inches beyond the last full tuck. Where a projecting tail interferes with the use of the sling, the tail shall be tapered and spliced into the body of the rope using at least two additional tucks (which will equire a tail length of approximately six rope diameters beyond the last full tuck) (h)(3)(iv) Fiber rope slings shall have a minimum clear length of rope between eye splices equal to 10 times the rope diameter (h)(3)(v) Knots shall not be used in lieu off splices (h)(3)(vi) Clamps not designed specifically for fiber ropes shall not be used for splicing (h)(3)(vii) For all eye splices, the eye shall be of such size to provide an included angle of not greater than 60 degrees at the splice when the eye is placed over the load or support (h)(4) End attachments. Fiber rope slings shall not be used if end attachments in contact with the rope r have sharp edges or projections (i) Synthetic web slings (i)(1) Sling identification. Each sling shall be marked or coded to show the rated capacities for each type of hitch and type of synthetic web material (i)(2) Webbing. Synthetic webbing shall be of uniform thickness and width and selvage edges shall not be split from the webbing's width (i)(3) Fittings. Fittings shall be: (i)(3)(i) Of a minimum breaking strength equal to that of the sling; and (i)(3)(ii) Free of all sharp edges that could in any way damage the webbing (i)(4) Attachment of end fittings to webbing and formation of eyes. Stitching shall be the only method used to attach end fittings to webbing and to form eyes. The thread shall be in an even pattern and contain a sufficient number of stitches to develop the full breaking strengthh of the sling (i)(5) [Reserved] (i)(6) Environmental conditions. When synthetic web slings are used, the following precautions shall be taken: (i)(6)(i) Nylon web slings shall not be used where fumes, vapors, sprays, mists or liquids of acids or phenolics are present (i)(6)(ii) Polyester and polypropylene web slings shall not be used where fumes, vapors, sprays, mists or liquids of caustics are present (i)(6)(iii) Web slings with aluminumm fittings shall not be used where fumes, vapors, sprays, mists or liquids of caustics are present. FIGURE N Basicc Synthetic Web Sling Constructions (h) )(5) Removal from service. Natural and synthetic fiber rope slings shall be immediately removed from service iff any of the following conditions are present: (h)(5)(i) Abnormal wear (h)(5)(ii) Powdered fiber between strands (h)(5)(iii) Broken or cut fibers (h)(5)(iv) Variations in the t size or roundness of strands (h)(5)(v) Discoloration or rotting (h)(5)(vi) Distortion of hardware in the sling (h) )(6) Repairs. Only fiber rope slings made from new rope shall be used. Use of repaired or reconditioned fiber rope slings is prohibited.

7 (i)(7) Safe operating temperatures. Synthetic web slings of polyester and nylon shall not be used at temperatures in excess of 180 deg. F. Polypropylene web slings shall not be used at temperatures in excess of 200 deg. F (i)(8) Repairs (i)(8)(i) Synthetic web slings which are repaired shall not be used unless repaired by a sling manufacturer or an equivalent entity (i)(8)(ii) Each repaired sling shall be proof tested by the manufacturer or equivalent entity to twice the rated capacity prior to its return to service. The employer shall retain a certificate of the proof test and make it available for examination (i)(8)(iii) Slings, including webbing and fittings, which have been repaired in a temporary manner shall not be used (i)(9) Removal from service. Synthetic web slings shall be immediately removed from service if any of the following conditions are present: (i)(9)(i) Acid or caustic burns; (i)(9)(ii) Melting or charring of any part of the sling surface; (i)(9)(iii) Snags, punctures, tears or cuts; (i)(9)(iv) Broken or worn stitches; or (i)(9)(v) Distortion of fittings. [40 FR 27369, June 27, 1975, as amended at 40 FR 31598, July 28, 1975; 41 FR 13353, Mar. 30, 1976; 58 FR 35309, June 30, 1993; 61 FR 9227, March 7, 1996; 76 FR 36607, June 8, 2011]

8 03/29/ Removing synthetic web slings from service. Page 1 of 2 8/1/2011 All DOL OSHA Advanced Search A to Z Index En Español Contact Us About OSHA OSHA Newsletter RSS Feeds Print This Page Text Size Home Workers Regulations Enforcement Data & Statistics Training Publications Newsroom Small Business What's New Offices Standard Interpretations - Table of Contents Standard Number: (i)(9); (i)(8) March 29, 1982 I. Mike Gross, Manager Safety/Fire Protection Bell Helicopter Textron P.O. Box 482 Fortworth, Texas Dear Mr. Gross: This is in response to your letter of February 23, 1982, which provided additional information to support your original request of September 14, 1981 for a clarification of the requirements of 29 CFR (i)(9)(iii) and (iv). As you were informed in my letter of November 19, 1981, 29 CFR (i)(9)(iii) and (iv) are enforced to ensure that synthetic web slings damaged so as to reduce their load carry capability, are immediately removed from service. As your letter of February 23rd points out some synthetic web slings are designed with external jacket yarns which protect the internal load carrying yarns. Such slings may be continued in use with some of the outer yarns parted as long as such use is in accord with the manufacturer's recommendations. If we may be of further assistance, please contact me. Sincerely, Patrick R. Tyson Director, Federal Compliance and State Programs November 19, 1981 I. Mike Gross, Manager Safety/Fire Protection Bell Helicopter Textron P.O. Box 482 Forth Worth, Texas Dear Mr. Gross, This is in response to your letter of September 14, 1981, requesting a clarification of 29 CFR (i)(9), synthetic web slings, "removal from service". Your letter addressed to the Fort Worth Area Office was forwarded to this office for reply. 29 CFR (i)(9)(iii) and (iv) are enforced to ensure that damaged synthetic web slings are immediately removed form service. Slings with burned fibers, melting or charring of the sling surface, snags, punctures, tears or cuts, broken or worn stitches, or distortion of fittings, have experienced some degradation of their ability to handle a load. Since the extent of reduction of load carrying capability cannot be easily quantified, continued

9 03/29/ Removing synthetic web slings from service. Page 2 of 2 8/1/2011 usage of a damaged sling can cause employee injury either by immediate failure or continued reduction of the ability of the sling to handle a load. However, synthetic web slings may possibly be repaired by a sling manufacturer or an equivalent entity and returned to service in accordance with 29 CFR (i)(8)(ii). For information, on August 30, 1973, OSHA published in the Federal Register a proposed standard for industrial slings. This agency received over 60 written comments concerning the proposed standard. Each of the comments was carefully reviewed and the proposed standard was modified, as warranted, and published in the Federal Register on June 27, 1975, as a final rule. Both the proposed and final standard for slings were based largely upon the requirements in the American National Standards Institute, (ANSI) B If we may be of further assistance please call or write. Sincerely, Patrick R. Tyson Acting Director, Federal Compliance and State Programs Standard Interpretations - Table of Contents Freedom of Information Act Privacy & Security Statement Disclaimers Customer Survey Important Web Site Notices International Contact Us U.S. Department of Labor Occupational Safety & Health Administration 200 Constitution Ave., NW, Washington, DC Telephone: OSHA (6742) TTY:

10 05/12/ Evaluation of variance application requesting the use of proof coil and high test chain... Page 1 of 1 8/1/2011 All DOL OSHA Advanced Search A to Z Index En Español Contact Us About OSHA OSHA Newsletter RSS Feeds Print This Page Text Size Home Workers Regulations Enforcement Data & Statistics Training Publications Newsroom Small Business What's New Offices Standard Interpretations - Table of Contents Standard Number: (e) May 12, 1983 MEMORANDUM FOR: THRU: FROM: SUBJECT: JAMES J. CONCANNON Director Office of Variance Determination DONALD A. SHAY Director Office of Compliance Programming JOHN K. BARTO Chief Division of Occupational Safety Programming Evaluation of Variance Application #1686, which Contains Eastern Airlines Request to Allow the Continued Use of the Proof Coil and High Test Chain Slings Under Certain Procedures The use of other than alloy steel chain is not prohibited specifically in 29 CFR , but only alloy steel chain is recommended by chain manufacturers for overhead hoisting. Proof coil and high test chain is used for purposes where failure of the chain would not endanger human life or result in serious damage to property or equipment. Proof coil and high test chains should only be used in accordance with the manufacturer's recommendations. Standard Interpretations - Table of Contents Freedom of Information Act Privacy & Security Statement Disclaimers Customer Survey Important Web Site Notices International Contact Us U.S. Department of Labor Occupational Safety & Health Administration 200 Constitution Ave., NW, Washington, DC Telephone: OSHA (6742) TTY:

11 02/05/ Required Frequency of Periodic Wire Rope Inspections for Lifting Equipment Page 1 of 1 8/1/2011 All DOL OSHA Advanced Search A to Z Index En Español Contact Us About OSHA OSHA Newsletter RSS Feeds Print This Page Text Size Home Workers Regulations Enforcement Data & Statistics Training Publications Newsroom Small Business What's New Offices Standard Interpretations - Table of Contents Standard Number: (d); February 5, 1992 Mr. J. R. Pizzano Project Manager, Reactor Services Project Newport News Shipbuilding 4101 Washington Avenue Newport News, Virginia Dear Mr. Pizzano: This correspondence is in response to your letter dated June 18, 1991, which requested an interpretation of the standards addressing the required frequency of periodic wire rope inspections for lifting equipment. Please excuse our delay in responding to your inquiry. The interpretation requested in your letter involves further determination as to whether following the current ANSI standards for lifting equipment wire rope inspections would: 1) constitute a de minimis violation, or 2) be in complete compliance with 29 CFR 1910 standards. As was explained previously in Mr. Sauger's letter of March 21, 1990, when an employer is not in complete compliance with a provision of an OSHA standard but is following a currently accepted industry standard which provides equivalent employee safety, such violation of the OSHA standard would be considered de minimis. Based on our understanding of the facts as presented, we consider your procedures which follow the current ANSI standards pertaining to the periodic inspection of wire rope on lifting devices, to be a de minimis violation of the applicable OSHA standards pertaining to the monthly inspections of such rope. The incorporation of national consensus standards into the Code of Federal Regulations (CFR) is allowed by the Administrative Procedure Act, on the condition that the incorporation is approved by the Director of the Federal Register, and that the material is made reasonably available to the persons affected. The standard which governs incorporation by reference, 29 CFR , was amended in February 1984 to clarify that only mandatory provisions of standards incorporated by reference are adopted as OSHA standards. Although revisions and amendments to a national consensus standard are allowed prior to adoption as federal regulations, once a national consensus standard is adopted, including any revisions and amendments, the CFR cannot be further changed without compliance with the rulemaking process. Therefore, as subsequent versions of the national consensus standard are updated, they do not automatically supersede the version which was adopted as a federal regulation. Should it be desired, you may apply for a permanent variance in order to allow you to use the current ANSI standards. Please refer to Section of the attached copy of 29 CFR 1905 for the criteria to complete an application for a permanent variance. A permanent variance can be obtained through the submission of a valid request requiring an alternate method, system, procedure, etc., which is as safe and healthful as the requirements of the standard from which the variance is sought. We hope that we have responded fully to your concerns. Your interest in occupational safety and health is appreciated. Sincerely, Patricia K. Clark Director Directorate of Compliance Programs Standard Interpretations - Table of Contents Freedom of Information Act Privacy & Security Statement Disclaimers Customer Survey Important Web Site Notices International Contact Us U.S. Department of Labor Occupational Safety & Health Administration 200 Constitution Ave., NW, Washington, DC Telephone: OSHA (6742) TTY:

12 01/10/ Requirement for a safety latch on a sling hook depends on the activity for which the s... Page 1 of 2 8/1/2011 All DOL OSHA Advanced Search A to Z Index En Español Contact Us About OSHA OSHA Newsletter RSS Feeds Print This Page Text Size Home Workers Regulations Enforcement Data & Statistics Training Publications Newsroom Small Business What's New Offices Standard Interpretations - Table of Contents Standard Number: (a)(29); (j)(2); (c)(6); ; ; ; This letter constitutes OSHA's interpretation only of the requirements discussed and may not be applicable to any situation not delineated within the original correspondence. January 10, 2006 Mr. Craig McCandless Ashley Sling, Inc. 100 Great S.W. Parkway Atlanta, GA Dear Mr. McCandless: This is in response to your letter of August 16, 2005, requesting clarification of the Occupational Safety and Health Administration (OSHA) requirements for safety latches on hoisting hooks. You indicated in your letter that the requirements for latches on hooks were only stated in the OSHA standard at 29 CFR , Derricks, and you found no such mention in , which contains requirements for Slings. Your paraphrased question and our response are provided below. Question: Does OSHA require the use of latches on hooks on slings? Response: Whether OSHA requires a safety latch on a sling hook depends on the activity for which the sling is being used. You are correct that although the standard for slings provides that "[s]lings shall be securely attached to their loads," the section does not explicitly require that the hook be equipped with a safety latch (29 CFR (c)(6)). Use of a hook with a safety latch would, of course, be one way of securely attaching a sling to its load. As you also noted, OSHA's standard for derricks does include an explicit requirement for latch type hooks: "Hooks shall meet the manufacturer's recommendations... [and] [s]afety latch type hooks shall be used wherever possible." (29 CFR (j)(2)(i) and (j)(2)(ii)). The standard defines "safety hook" as "a hook with a latch to prevent slings or load from accidentally slipping off the hook." (29 CFR (a)(29)). We would also call your attention to the following provisions in OSHA's maritime and construction standards: 29 CFR Part 1917, Marine Terminals, at 29 CFR (e)(2) ("Crane hooks shall be latched or otherwise secured to prevent accidental load disengagement."); 29 CFR Part 1918, Safety and Health Regulations for Longshoring, at 29 CFR (e)(2) ("Crane hooks shall be latched or otherwise secured to prevent accidental load disengagement."), and at (b) ("Cargo handling bridles, such as pallet bridles, which are to remain attached to the hoisting gear while hoisting successive drafts, shall be attached by shackles, or other positive means shall be taken to prevent them from being accidentally disengaged from the cargo hook."); and 29 CFR Part 1926, Safety and Health Regulations for Construction, at 29 CFR (d)(2)(ii) (in specified situations, "Hooks with self-closing safety latches or their equivalent shall be used to prevent components from slipping out of the hook..."). The Occupational Safety and Health Act of 1970 also contemplates that, in the absence of a specific OSHA standard addressing a hazard, employers are required, by the statute's "General Duty Clause" (Section 5(a)(1)), to protect employees from serious recognized hazards. OSHA often considers the provisions of industry consensus standards, such as those published by the American National Standards Institute (ANSI) or the American Society of Mechanical Engineers (ASME), when evaluating whether a hazard is "recognized" and whether there is a feasible means of abating that hazard. One such provision that OSHA would consider is Section , Hooks, of ASME , Overhead and Gantry Cranes: "Latch-equipped hooks shall be used unless the application makes the use of the latch impractical or unnecessary." Thank you for your interest in occupational safety and health. OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at If you have any further questions, please feel free to contact the Office of General Industry Enforcement at (202) Sincerely, Richard E. Fairfax, Director Directorate of Enforcement Programs

13 01/10/ Requirement for a safety latch on a sling hook depends on the activity for which the s... Page 2 of 2 8/1/2011 Standard Interpretations - Table of Contents Freedom of Information Act Privacy & Security Statement Disclaimers Customer Survey Important Web Site Notices International Contact Us U.S. Department of Labor Occupational Safety & Health Administration 200 Constitution Ave., NW, Washington, DC Telephone: OSHA (6742) TTY:

14 CPL CPL B - 29 CFR (e)(4), Alloy Steel Chain Slings Proof Testing Page 1 of 2 8/1/2011 All DOL OSHA Advanced Search A to Z Index En Español Contact Us About OSHA OSHA Newsletter RSS Feeds Print This Page Text Size Home Workers Regulations Enforcement Data & Statistics Training Publications Newsroom Small Business What's New Offices Directives - Table of Contents Record Type: Instruction Directive Number: CPL Old Directive Number: CPL B Title: 29 CFR (e)(4), Alloy Steel Chain Slings Proof Testing Information Date: 10/01/1981 Standard Number: (e)(4) OSHA Instruction CPL B October 1, 1981 Office of Compliance Programming SUBJECT: 29 CFR (e)(4), Alloy Steel Chain Slings, Proof Testing. A. Purpose. This instruction provides guidelines for uniform enforcement of 29 CFR (e)(4) as it pertains to proof testing of alloy steel chain slings, fittings, coupling links, and other component parts. B. Scope. This instruction applies OSHA-wide. C. Cancellation. OSHA Instruction CPL A, November 14, 1980, is canceled. D. Action. OSHA Regional Administrators/Area Directors shall ensure that the enforcement or 29 CFR (e)(4) is consistent with the guidelines in F. of this instruction E. Federal Program Change. This instruction describes a Federal program change which affects State programs. Each Regional Administrator shall: 1. Ensure that this change is forwarded to each State designee. 2. Explain the technical content of the change to the State designee as requested. 3. Ensure that the State designees are asked to acknowledge receipt of this Federal program change in writing, within 30 days of notification, to the Regional Administrator. This acknowledgment should include a description either of the State's plan to implement the change or of the reasons why the change should not apply to that State. 4. Review policies, instructions and guidelines issued by the State to determine that this change has been communicated to State program personnel. Routine monitoring activities (accompanied inspections and case file reviews) shall also be used to determine if this change has been implemented in actual performance Page 1 OSHA INSTRUCTION CPL B OCT OFFICE OF COMPLIANCE PROGRAMMING F. Guidelines. 1. When an alloy steel chain sling is assembled with components that require welding in assembly, the completed sling must be proof tested by the sling manufacturer or equivalent entity, before the sling is used. 2. When an alloy steel chain sling is made up of welded components which were individually proof tested, and no further welding is required to assemble the sling, the assembled chain sling does not have to be proof tested. The sling manufacturer or equal entity assembling the sling shall attach a tag identification with appropriate information, and furnish an appropriate certificate to the purchaser or his representative which indicates the rated capacity. 3. Proof testing is not required when the sling is made up of components not requiring welding to

15 CPL CPL B - 29 CFR (e)(4), Alloy Steel Chain Slings Proof Testing Page 2 of 2 8/1/2011 assemble. The capacity of the sling shall be no greater than the rated capacity of the weakest component. G. Background OSHA has received letters from manufacturers of alloy steel chain and components requesting that a clarification of 29 CFR (e)(4) be issued to the field pertaining to proof testing. Manufacturers of forged components comply with the following criteria: 1. The quality of forged components is confirmed by tensile and hardness tests that will verify material and heat treatment. A check analysis made from the drillings of the material will verify the chemical composition of the material. 2. Production quantities of the forging component are subjected to a rigid Visual inspection and additional quality control procedures include magnetic particle and hardness testing. 3. Ultimate strength of material tests are made with the destructive testing performed on the basis of a statistical sampling procedure proven over the years. Page 2 OSHA INSTRUCTION CPL B OCT OFFICE OF COMPLIANCE PROGRAMMING 4. The nondestructive testing such as magnetic particle inspection and hardness tests may be performed on the basis of 100-percent of the lot, or again, may be performed on the basis of a sampling technique. 5. The forged components used in alloy steel chain slings are similar and in most instances identical to, if not the same as the forged components used on wire rope slings, which do not require proof testing. The rated capacity for wire slings, like alloy steel chain slings, is limited to the rated capacity of its weakest component. Thorne G. Auchter Assistant Secretary DISTRIBUTION: National,Regional and Area Offices Compliance Officers State Designees NIOSH Regional Program Directors Directives - Table of Contents Freedom of Information Act Privacy & Security Statement Disclaimers Customer Survey Important Web Site Notices International Contact Us U.S. Department of Labor Occupational Safety & Health Administration 200 Constitution Ave., NW, Washington, DC Telephone: OSHA (6742) TTY:

16 Contact Information Training Columbus McKinnon offers informative hoist and rigging training classes that are recognized world-wide with accreditation that meets and exceeds the highest safety regulations and industry standards. Whether on-site, at regional locations, or at our corporate facilities; we provide classroom and on-hands training that include: Overhead Crane & Hoist Inspection Crane & Hoist Operator Hoist Inspection, Repair & Maintenance Rigging Rigging Gear Inspection Load Securement Entertainment Technology Product Sales Static Stepless Crane Controls Hoist Maintenance Certification Visit: At CMCO Depot you'll find: Detailed Class Information Dates and Locations Pricing Online Reservation & Payment We believe that proper training on the most current techniques, product features, and industry requirements is critical to maintaining a safe work environment and sound maintenance program. For additional information, please call: (877) Columbus McKinnon Corporation