1.0 PURPOSE
The purpose of this procedure is to provide written instructions for Nitro Construction Services in the safe use of rigging equipment.
2.0 RESPONSIBILITY
It is the responsibility of the Site Manager/Superintendent to implement the requirements of this procedure.
3.0 REFERENCES
29 CFR 1926.251
4.0 PROCEDURE
4.1 Rigging equipment for material handling shall be inspected prior to use on each shift and as necessary during its use to ensure that it is safe.
4.2 Employers must ensure that rigging equipment:
4.2.1 Has permanently affixed and legible identification markings as prescribed by the manufacturer that indicates the recommended safe working load;
4.2.2 Not be loaded in excess of its recommended safe working load as prescribed on the identification markings by the manufacturer; and
4.2.3 Not be used without affixed, legible identification markings
4.3 Damaged or defective equipment shall be immediately removed from service.
4.4 Rigging equipment shall not be loaded in excess of its recommended safe working load.
4.5 Tag lines shall be used.
4.6 No employee shall be allowed under a suspended load. Additionally, all employees shall be a safe distance from any load that is being hoisted or pulled. All employees shall be clear of the Line-Of-Fire of any potential release of energy.
4.7 Any lifts made from a river-based crane involving irregularly shaped loads whereby the center of gravity may be difficult to ascertain shall follow all requirements of EHS procedure #42. Critical Lift status will be assigned to the lift regardless of weight in relation to the capacity of the crane as well.
4.8 Rigging equipment, when not in use, shall be removed from the immediate work area so as not to present a hazard to employees.
4.9 Special custom design grabs, hooks, clamps, or other lifting accessories, for such units as modular panels, prefabricated structures, and similar materials, shall be marked to indicate the safe working loads and shall be proof-tested prior to use to 125% of their rated load
4.10 Each day before used, the sling and all fastenings and attachments shall be inspected for damage
or defects by a competent person designated by the employer.
4.11 All rigging equipment will be inspected annually by a Competent Person at a minimum and a record kept, including end connections, The Criterial for these inspections shall be found in the
following inspection sheets.
4.12 The certification records must include:
4.12.1 Date of inspection,
4.12.2 Signature of the person performing the inspection, and
4.12.3 Identifier of chain inspected.
5.0 ALLOY STEEL CHAINS
5.1 Welded alloy steel chain slings shall have permanently affixed durable identification stating size, grade, rated capacity, and sling manufacturer.
5.2 Hooks, rings, oblong links, pear-shaped links, welded or mechanical coupling links, or other attachments, when used with alloy steel chains, shall have a rated capacity at least equal to that of the chain.
5.3 Job or shop hooks and links, or makeshift fasteners, formed from bolts, rods, etc. or other such attachments, shall not be used.
5.4 Rated capacity (working load limit) for alloy steel chain slings shall conform to the valves shown in Table H-1.
5.5 Whenever wear at any point of any chain link exceeds that shown in Table H-2, the assembly shall be removed from service.
6.0 WIRE ROPE
6.1 Tables H-3 through H-14 shall be used to determine the safe working loads of various sizes and classifications of improved plow steel wire rope and wire rope slings with various types of terminals. For sizes, classifications, and grades not included in these tables, the safe working load recommended by the manufacturer for the specific, identifiable products shall be followed, provided that a safety factor of not less than five (5) is maintained.
6.2 Protruding ends of strands in splices on slings and bridles shall be covered or blunted.
6.3 Wire rope shall not be secured by knots, except on haul back lines on scrapers.
6.4 The following limitations shall apply to the use of wire rope.
6.4.1 An eye splice made in any wire rope shall have not less than three (3) full tucks. However, this requirement shall not operate to preclude the use of another form of splice or connection that can be shown to be as efficient and which is not otherwise prohibited.
6.4.2 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.
6.4.3 Eyes in wire rope bridles, slings, or bull wires shall not be formed by wire rope clips or knots.
6.4.4 Wire rope shall not be used if in any length of eight (8) diameters, the total number of visible broken wires exceeds 10% of the total number of wires, or if the rope shows other signs of excessive wear, corrosion, or defect.
6.5 When U-bolt wire rope clips are used to form eyes, Table H-20 shall be used to determine the number and spacing of clips.
6.5.1 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.
8.0 SHACKLES AND HOOKS
8.1 Table H-19 shall be used to determine the safe working loads of various sizes of shackles, except that higher safe working loads are permissible when recommended by the manufacturer for specific, identifiable products, provided that a safety factor of not less than five (5) is maintained.
8.2 The manufacturer’s recommendations shall be followed in determining the safe working loads of the various sizes and types of specific and identifiable hooks.
8.3 Employers must not use shackles with loads more than the rated capacities (i.e.., working load limits) indicated on the shackle by permanently affixed and legible identification markings prescribed by the manufacturer.
8.4 All hooks for which no applicable manufacturer’s recommendations are available shall be tested to twice the intended safe working load before they are initially put into use.
8.5 Latches will be in place on all hooked, eliminating the hook throat opening.
8.6 The employer shall maintain a record of the status and the results of such a test.
10.0 APPENDICES/TABLES
10.1 Table H-1 – Rated Capacity for Alloy Steel Chain Slings
10.2 Table H-2 – Maximum Allowable Wear at any Point of Link
10.3 Table H-3 – Rated Capacities for single-leg Slings 6X19 and 6X37 Classification Improved Plow Steel Grade Rope With Fiber Core (FC)
10.4 Table H-4 – Rated Capacities for Single Leg Slings 6X19 and 6X37 Classification Improved Plow Steel Grade Rope with Independent Wire Rope Core (IWRC)
10.5 Table H-5 – Rated Capacities for Single Leg Slings Cable Laid Rope-Mechanical Splice Only 7X7X7 and 7X7X19 Construction Galvanized Aircraft Grade Rope 7X6X19 IWRC Construction Improved Plow Steel Grade Rope
10.6 Table H-6 – Rated Capacities for Single Leg Slings 8-Part and 6-Part Braided Rope 6X7 and 6X19 Construction Improved Plow Steel Grade Rope 7X7 Construction Galvanized Aircraft Grade Rope
10.7 Table H-7 (a) – Rated Capacities for 2-Leg and 3-Leg Bridle Slings 6X19 and 6X37 Classification Improved Plow Steel Grade Rope with Fiber Core (FC)
10.8 Table H-7 (b) – Rated Capacities for 2-Leg and 3-Leg Bridle Slings 6X19 and 6X37 Classification Improved Plow Steel Grade Rope with Fiber Core (FC)
10.9 Table H-8 (a) – Rated Capacities for 2-Leg and 3-Leg Bridle Slings 6X19 and 6X37 Classification Improved Plow Steel Grade Rope with Independent Wire Rope Core (IWRC)
10.10 Table H-8 (b) – Rated Capacities for 2-Leg and 3-Leg Bridle Slings 6X19 and 6X37 Classification Improved Plow Steel Grade Rope with Independent Wire Rope Core (IWRC)
10.11 Table H-9 – Rated Capacities for 2-Leg and 3-Leg Bridle Slings Cable Laid Rope-Mechanical Splice Only 7X7X7 and 7X7x19 Construction Galvanized Aircraft Grade Rope 7X6X19 IWRC Construction Improved Plow Steel Grade Rope
10.12 Table H-10 (a) – Rated Capacities for 2-Leg and 3-Leg Bridle Slings 8-Part Braided Rope 6X7 and 6X19 Construction Improved Plow Steel Grade Rope 7X7 Construction Galvanized Aircraft Grade Rope
10.13 Table H-10 (b) – Rate Capacities for 2-Leg and 3-Leg Bridle Slings 8-Part and 6-Part Braided Rope 6X7 and 6X19 Construction Improved Plow Steel Grade Rope 7X7 Construction Galvanized Aircraft Grade Rope
10.14 Table H-11 – Rated Capacities for Strand Laid Grommet-Hand Tucked Improved Plow Steel Grade Rope
10.15 Table H-12 – Rate Capacities for Cable Laid Grommet-Hand Tucked 7X6X7 and 7X6X9 Construction Improved Plow Steel Grade Rope 7X7X7 Construction Galvanized Aircraft Grade Rope
10.16 Table H-13 – Rated Capacities for Strand Laid Endless Slings-Mechanical Jo Improved Plow Steel Grade Rope
10.17 Table H-14 – Rated Capacities for Cable Laid Endless Slings-Mechanical Jo 7X7X7 and 7X7X19 Construction Galvanized Aircraft Grade Rope 7X6X19 WIRC Construction Improved Plow Steel Grade Rope
10.20 Table H-16 (a) – Nylon Rope Slings
10.21 Table H-16 (b) – Nylon Rope Slings
10.22 Table H-17 (a) – Polyester Rope Slings
10.23 Table H-17 (b) – Polyester Rope Slings
10.24 Table H-18 (a) – Polyester Rope Slings
10.25 Table H-18 (b) – Polyester Rope Slings
10.26 Table H-19 – Safe Working Loads for Shackles
10.27 Table H-20 – Number and Spacing of U-Bolt Wire Rope Clips
10.28 NCS Form 023 – Rigging Inspection Checklist