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ROPES CONSTRUCTION>
BUILDING TECHNIQUES> FIST GRIP CLAMPS |
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WOLF BUILDING STANDARDS
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CROSBY FIST GRIP WIRE ROPE CLIPS |
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WARNINGS AND APPLICATION
INSTRUCTIONS |
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G-429
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3.
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When three or more clips are required, space additional clips equally between first two - take up rope slack - tighten nuts on each Fist Grip evenly, alternating from one nut to the other until reaching recommended torque. |
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 WARNING |
- Failure to read, understand, and follow these instructions may cause death or serious injury.
- Read and understand these instructions before using clips.
- Match the same size clip to the same size wire rope.
- Prepare wire rope end termination only as instructed.
- Do not use with plastic coated wire rope.
- Apply first load to test the assembly. This load should be of equal or greater weight than loads expected in use. Next, check and retighten nuts to recommended torque (See Table 1, this page).
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| 4. If a pulley (sheave) is used, in place of a thimble add one additional Fist Grip. Fist Grip spacing should be as shown. |
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| 5. WIRE ROPE SPLICING PROCEDURES: |
| (Not for ropes course use) |
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The preferred method of splicing two wire ropes together is to use interlocking turnback eyes with thimbles, using the recommended number of clips on each eye (See Figure 5)). |
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Efficiency ratings for wire rope end terminations are based upon the catalog breaking strength of wire rope. The efficiency rating of a properly prepared loop or thimble eye termination for clip sizes 1/8" through 7/8" is 80%.
The number of clips shown (see Table I ) is based upon using RRL or RLL wire rope, 19 x 7 Class, IPS, XIP, sizes 1-3/4 inch and smaller.
For other classes of wire rope not mentioned, we recommend contacting Crosby Engineering at the address or telephone number on the back cover to ensure the desired efficiency rating.
The style of wire rope termination used for any application is the obligation of the user.
For OSHA (Construction) applications, see OSHA 1926.251.
1.
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An alternate method is to use twice the number of clips as used for a turnback termination. The rope ends are placed parallel to each other, overlapping by twice the turnback amount shown in the application instructions. The minimum number of clips should be installed on each dead end (See Figure 6). Spacing, installation torque, and other instructions still apply. |
6. IMPORTANT
Apply first load to test the assembly. This load should be of equal or greater weight than loads expected in use. Next, check and retighten nuts to recommended torque.
In accordance with good rigging and maintenance practices, the wire rope end termination should be inspected periodically for wear, abuse, and general adequacy. |
Refer to Table I in following these instructions. Turn back specified amount of rope from thimble or loop. Apply first clip one base width from dead end of rope. Tighten nuts evenly, alternating from one nut to the other until reaching the recommended torque.
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2.
When two clips are required, apply the second clip as near the loop or thimble as possible. Tighten nuts evenly, alternating until reaching the recommended torque. When more than two clips are required, apply the second clip as near the loop or thimble as possible, turn nuts on second clip firmly, but do not tighten. Proceed to Step 3.
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| Ropes Course Specifications Table 1 |
Clip
Size
(Inches) |
Rope
Size
(Inches) |
Minimum No. of
Clips |
Amount of Rope
to Turn Back in Inches |
* Torque
in
Ft. Lbs. |
| 5/16** |
5/16 |
2 |
5 |
30 |
| 3/8 |
3/8 |
2 |
5-1/4 |
45 |
| 7/16 |
7/16 |
2 |
6-1/2 |
65 |
| 1/2 |
1/2 |
3 |
11 |
65 |
| If a pulley (sheave) is used for turning back the wire rope, add one additional clip. |
| If a greater number of clips are used than shown in the table, the amount of turnback should be increased proportionately. |
| *The tightening torque values shown are based upon the threads being clean, dry, and free of lubrication. |
| ** Not for use on belay or element cables! |
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