Section R. 408.15226 - Cable, wire rope, and wire rope slingsRule 5226.
(1) Cable, wire rope, and wire rope slings shall have a designed safety factor of not less than 5.(2) Wire rope and cable in load-carrying or hoist service and their fittings shall be visually inspected when installed and once each day thereafter when in use.(3) Wire rope shall not be used if, within a segment of 8 diameters in length, 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 defects.(4) Wire rope and cable removed from service due to defects shall be plainly marked or identified as being unfit for further use on a crane, hoist, or other load-carrying device.(5) When U-type cable clips are applied, the U-type cable clips shall comply with figure 1.(6) Cable clips shall be spaced approximately 6 rope diameters apart.(7) Wire rope and cable shall be protected at sharp or tight bends by use of corner irons or blocks.(8) A safety hook shall be used where there is a hazard created if the tension on the hook can be relieved by fouling or catching.(9) Installation, inspection, maintenance, repair, and testing of ropes, cables, and slings shall be done only by persons qualified to do such work.(10) Proper storage shall be provided for a sling while not in use.(11) Connections, fittings, fastenings, and other parts used in connection with ropes and cables shall be of good quality and of proper size and strength and shall be installed in accordance with the manufacturer's recommendations.(12) Hooks, shackles, rings, pad eyes, and other fittings that show excessive wear or that have been bent, twisted, or otherwise damaged shall be removed from service.(13) Running lines of hoisting equipment located within 6 feet 6 inches of the ground or working level shall be boxed off or otherwise guarded or the operating area shall be restricted.(14) There shall be not less than 2 full wraps of hoisting cable from slipping off.(15) A drum shall have a flange at each end to prevent the cable from slipping off.(16) A bottom sheave shall be protected by a close-fitting guard to prevent the cable from jumping the sheave.(17) The reeving of a rope shall be so arranged as to minimize the chafing or abrading while in use.(18) Multiple-part lines shall not be twisted around each other. If there is a slack rope condition, the rope shall be properly seated on the drum and in the sheaves.(19) Knots shall not be allowed in a wire rope.(20) Figure 1 reads as follows: FIGURE 1
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NOTE: There is only 1 correct method of installing wire rope clips. Wire rope clips should be attached to rope ends as shown in photograph above. The base of each clip should bear against the live, or long rope end, and the U-bolt should bear against the dead or short rope end. |
NUMBER AND SPACING OF CLIPS
FOR ROPES OF VARIOUS SIZES
Diameter of rope (in.) | Number of clips | Center-to-center space between clips (in.) | Length of rope turned back exclusive of eye (in.) |
1/4 | 2 | 1 1/2 | 3 |
5/16 | 2 | 1 7/8 | 4 |
3/8 | 2 | 2 1/4 | 5 |
7/16 | 2 | 2 5/8 | 6 |
1/2 | 3 | 3 | 9 |
5/8 | 3 | 3 3/4 | 12 |
3/4 | 4 | 4 1/2 | 18 |
7/8 | 4 | 5 1/4 | 21 |
1 | 4 | 6 | 24 |
1 1/8 | 5 | 6 3/4 | 34 |
1 1/4 | 5 | 7 1/2 | 38 |
1 3/8 | 6 | 8 1/4 | 50 |
1 1/2 | 6 | 9 | 54 |
1 5/8 | 6 | 9 3/4 | 60 |
1 3/4 | 7 | 10 1/2 | 74 |
1 7/8 | 8 | 11 1/4 | 90 |
2 | 8 | 12 | 96 |
2 1/8 | 8 | 13 | 104 |
2 1/4 | 8 | 14 | 112 |
Mich. Admin. Code R. 408.15226
1979 AC; 1989 AACS; 2018 MR 3, Eff. 2/20/2018