California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 17 - Mine Safety Orders › Article 36 - Hoisting Equipment › GENERAL › Section 7137 - (19-24). Hoisting Rope-Method of Attaching to Conveyance

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(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 rope
								  (inches)
Number of clips
Space between clips
								  (inches)
¾
								  ..........................
..........................5
½
7/8
								  ..........................
..........................5
5 ¼
1..........................
..........................5
6
1 ½
								  ..........................
..........................5
7
1 ¼
								  ..........................
..........................6
8
1/8
								  ..........................
..........................7
9
1 ½
								  ..........................
..........................8
10
1 5/8
								  ..........................
..........................8
10
1 ¾
								  ..........................
..........................8
11
1 7/8
								  ..........................
..........................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 ¼ 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.