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Subchapter 17. Mine Safety Orders
Article 36. Hoisting Equipment

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§7137. (19-24). Hoisting Rope--Method of Attaching to Conveyance.

(a) The hoisting rope shall be attached to the shaft conveyance by one of the following methods:

(1) Thimble With Clip or Clamp Method. The rope shall be attached to the load by passing one end around an oval thimble that is attached to the load and bending the end back so that it is parallel to the long or "live" end of the rope and fastening the two parts of the rope together with clips or clamps.

The "U" bolt of each clip shall encircle the short or "dead" end of the rope, and the distance between clips shall not be less than the figures given in the table below.

The following number of clips shall be used for various diameters of 6-strand 19-wire plow steel ropes. (Follow manufacturer's recommendations for other kinds of wire rope.)



Diameter of                               Space between 
rope (inches)     Number of clips         clips (inches) 
 3/4..................... 5                    4 1/2  
 7/8..................... 5                    5 1/4  
1........................ 5                    6 
11/2..................... 5                    7 
11/4..................... 6                    8 
 1/8..................... 7                    9 
11/2..................... 8                    10 
15/8..................... 8                    10 
13/4..................... 8                    11 
17/8..................... 8                    12 
2........................ 8                    12 

Where clamps other than "U" bolts are used, the manufacturer's recommendations shall be used.

For all wire ropes less than three-fourths inch in diameter, at least four clips shall be used.

When clips or clamps are installed on a hoisting rope, they shall be carefully tightened. A full load shall then be applied to the rope and the clips or clamps retightened under load before the rope is put into service.

During the first few days, the clips or clamps shall be inspected at frequent intervals and retightened as necessary.

(2) Zinc Socketing Method. For wire ropes over 1 1/4 inches in diameter, it is recommended that the zinc socketing method b used. If used, the work shall be done by a person experienced in this kind of work.

Babbit metal or lead for socketing wire ropes is prohibited.

(3) Thimble and Splice Method. The rope shall be attached to the load by passing one end around an oval thimble that is attached to the load, bending it back and fastening the "dead" end to the "live" line by splicing in such a manner as to develop the maximum efficiency possible for the particular rope size.

Such splice shall be made only by a workman skilled in wire rope splicing.

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