// CODE SNIPPET
1926.251(c) Wire Rope
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Employers must not use improved plow-steel wire rope and wire-rope slings with loads in excess of the rated capacities (i.e., working load limits) indicated on the sling by permanently affixed and legible identification markings prescribed by the manufacturer.
Protruding ends of strands in splices on slings and bridles shall be covered or blunted.
Wire rope shall not be secured by knots, except on haul back lines on scrapers.
The following limitations shall apply to the use of wire rope:
An eye splice made in any wire rope shall have not less than three full tucks. However, this requirement shall not operate to preclude the use of another form of splice or connection which can be shown to be as efficient and which is not otherwise prohibited.
Eyes in wire rope bridles, slings, or bull wires shall not be formed by wire rope clips or knots.
Wire rope shall not be used if, in any length of eight diameters, the total number of visible broken wires exceeds 10 percent of the total number of wires, or if the rope shows other signs of excessive wear, corrosion, or defect.
Except for eye splices in the ends of wires and for endless rope slings, each wire rope used in hoisting or lowering, or in pulling loads, shall consist of one continuous piece without knot or splice.
When U-bolt wire rope clips are used to form eyes, Table H-2 shall be used to determine the number and spacing of clips.
|Improved plow steel, rope diameter (inches)||Number of clips||Minimum spacing (inches)|
|Drop forged||Other material|
When used for eye splices, the U-bolt shall be applied so that the "U" section is in contact with the dead end of the rope.
Slings shall not be shortened with knots or bolts or other makeshift devices.
Sling legs shall not be kinked.
Slings used in a basket hitch shall have the loads balanced to prevent slippage.
Slings shall be padded or protected from the sharp edges of their loads.
Hands or fingers shall not be placed between the sling and its load while the sling is being tightened around the load.
Shock loading is prohibited.
A sling shall not be pulled from under a load when the load is resting on the sling.
Cable laid and 6 × 19 and 6 × 37 slings shall have a minimum clear length of wire rope 10 times the component rope diameter between splices, sleeves or end fittings.
Cable laid grommets, strand laid grommets and endless slings shall have a minimum circumferential length of 96 times their body diameter.
Braided slings shall have a minimum clear length of wire rope 40 times the component rope diameter between the loops or end fittings.
Fiber core wire rope slings of all grades shall be permanently removed from service if they are exposed to temperatures in excess of 200 °F (93.33 °C). When nonfiber core wire rope slings of any grade are used at temperatures above 400 °F (204.44 °C) or below minus 60 °F (15.55 °C), recommendations of the sling manufacturer regarding use at that temperature shall be followed.
Welding of end attachments, except covers to thimbles, shall be performed prior to the assembly of the sling.
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.
Wire rope slings shall have permanently affixed, legible identification markings stating size, rated capacity for the type(s) of hitch(es) used and the angle upon which it is based, and the number of legs if more than one.
Related Code Sections
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