- Part Number:1910
- Part Number Title:Occupational Safety and Health Standards
- Subpart:1910 Subpart N
- Subpart Title:Materials Handling and Storage
- Standard Number:
- GPO Source:
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-184-5; 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.
Braided wire rope is a wire rope formed by plaiting component wire ropes.
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.
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 fiber 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.
Choker hitch is a sling configuration with one end of the sling passing under 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.
Cross rod is a wire used to join spirals of metal mesh to form a complete fabric. (See Fig. N-184-2.)
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 or 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.
Fabric (metal 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-184-1.)
Handle is a terminal fitting to which metal mesh fabric is attached. (See Fig. N-184-1.)
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-184-1.)
Hitch is a sling configuration whereby the sling is fastened to an object or load, either directly to it or around it.
Link is a single ring of a chain.
Male handle (triangle) is a handle with a handle eye.
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-184-3.)
Master link or gathering 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-184-3.)
Mechanical coupling link is a nonwelded, mechanically closed steel link used to attach master links, hooks, etc., to alloy steel chain.
Diagam howing Two slings with indicators for sling width, overall length, bearing to bearing length, and fabric length. Further indicators point to both male handles, handle eye, female handle, and slot depth
Diagram showing Spirals welded or brazed to cross rods, with arrows pointing to cross rods and spiral. Another diagram indicates frabrick thickness.
Diagram indicates overall reach, the master link, master coupling link, coupling link, chaing, coupling link and sling hook.
Diagram indicates Forms of Hitch and Kind of Sling. Eye&Eye Vertical Hitch. Eye&Eye Choker Hitch. Eye&Eye Basket Hitch (Alterates have identical load rations). Endless Vertical Hitch. Endless Choker Hitch. Endless Basket Hitch (Alternateve have identical load ratings). Notes: Angles 5 deg or less from the veritcal may be considered vertical angles. For slings with legs more than 5 deg off vertical, the actual angle as shown in Figure N-184-5 must be considered. Explanation of Symbols: Minimum Diameter of Curvature. Represents a contact surface which shall have a diameter of curvature at least double the diameter of the rope from which the sling is made. Represents a contact surface which shall have a diameter of curvature at least 8 times the diameter of the rope. Represents a load in a choker hitch and illustrates the rotary force on the load and/or the slippage of the rope in contact with the load. Diameter of curvature of load surface shall be at least double the diameter of the rope.
Diagram indicates Form of Hitch and Vertical Hitch. Kind of Sling. Eye&Eye Vertical Hitch Not Applicable. Eye&Eye Choker Hitch Not Applicable. Eye&Eye Basket Hitch (Alternates have identical load ratings). Endless Vertical Hitch Not Applicable. Endless Choker Hitch Not Applicable. Endless Basket Hitch (Alternates have identical load ratings). Notes: For vertical angles of 5 deg or less, refer to Figure N-184-4 ''Basic Sling Configurations with Vertical Legs''. See Figure N-184-4 for explanation of symbols.
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-184-2.)
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-184-4.)
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
Alloy steel chain slings with cracked or deformed master links, coupling links or other components shall be removed from service.
|Chain size, inches||Minimum allowable chain size, inches|
Web slings with aluminum fittings shall not be used where fumes, vapors, sprays, mists or liquids of caustics are present.
Diagram depicting three of six types of sling constructions. Type I Triangle Choker typer. Contains Triangle Fitting, measured pull to pull when flat, choker slot, choker fitting, and fitting eye. Type II Triangle Triangle. Length Measured pull to pull when flat. Type III Eye and Eye with Flat Eyes. Length between Lap and Eye.
Diagram depicting the final three types of six of sling constructions. Type IV Eye and eye with Twisted Eyes. Length measured Eye Perpendicular to Sling Body. Type V Endless Type. Type VII Return Eye.
[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 9240, Mar. 7, 1996; 76 FR 33607, June 8, 2011; 84 FR 15105, Apr. 15, 2019]