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Rigging standards for Kobelco 7100 100-ton lattice crane

Discussion in 'Cranes' started by gmprox, Jun 15, 2022.

  1. gmprox

    gmprox New Member

    Joined:
    Jun 15, 2022
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    Location:
    Philippines
    Hi to all,

    For a 1” wire rope for both the main hoist and auxiliary hoist, am just wondering:
    #1 is there a (manufacturer) recommended minimum turnback length and no of clips/u-bolt?

    Actual turnback length is about 16”. Is this sufficient?

    Does the general rigging guidelines for 1” wire rope requiring at least 26-inch turnback apply?

    #2 the existing clips are installed so they are “straddling the dead end.” Should this be corrected and be the fastened the other way around (bolt on the live end side)? Pls confirm.

    #3 the actual no of clips installed is as follows:
    - main: 2 sets
    - auxiliary: 1 set

    Are these sufficient?

    Or does the general rigging guidelines for 1” wire rope requiring at least 5-sets (for both main and auxiliary hoists) apply? Or are these sufficient?
     

    Attached Files:

  2. hosspuller

    hosspuller Senior Member

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    The OSHA standard for clips can be remembered by... "NEVER put a saddle on a dead horse..."

    U-bolt on the live end will get you an OSHA citation... (if you were in the States)


    Although the Becket is doing the holding... The bolt is distorting & weakening the rope strands.
     
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  3. crane operator

    crane operator Senior Member

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    No cable clamps attached to the load line. Only on the back side of the becket.

    All your pictures are the wrong way to install.

    becket 1.jpg becket 2.jpg becket 1.jpg
     
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  4. John C.

    John C. Senior Member

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    Nice refresher!
     
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  5. crane operator

    crane operator Senior Member

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    The 26" turnback and 5 cable clamps is probably for if you have no becket at all. The becket will hold all the cable strain, like hosspuller says.

    Typical cable "tail" or turnback with a becket is 13 times the cable diameter, so 13" of cable sticking out the backside of the becket would be sufficient on your 1" cable.
     
    Last edited: Jun 15, 2022
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  6. Bluox

    Bluox Senior Member

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    The third picture has the line thru the becket the wrong way.
    Bob
     
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  7. hosspuller

    hosspuller Senior Member

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    Good eye for detail ..