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Thread: Help Advice Construction Swivel Arm Jib Crane Hoist

  1. #11
    PJs
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    (the floor is old and yielding)
    Really! I'm sorry forgiaro but you keep changing the parameters and to add that the "floor is old and yielding". This is feeling unsafe at any speed or belief in being able to do it or not...It's just not right and common sense should prevail.

    The difference between 200 & 500kg for a system like this is SIGNIFICANT and who is to say that it won't be overloaded at some point in time, probably because you have no way to be sure what a weight may be above the 200kg or between those extreme (Maximum) values.

    I have made my recommendations for the vertical stanchion and how it should be attached with Strap Plates with no penetration of the concrete pillar. However with the "floor being OLD and Yielding" I no longer trust any of it to support such a system.

    These are the Wrong Calculators for this type system! Plus I barely read Italian, even with Google Translate!
    resting beam calculation with concentrated load
    beam Calculation resting with evenly distributed load

    I have never seen a 25mm bolt available in Metric fasteners (24mm or 26mm). Here are two links for everything you might want to know about Bolts, Grades, Tension & Shear...etc. Pins and shoulder bolts may be another way...

    Shear, most important in your application...https://www.nucor-fastener.com/Files...r_Strength.pdf
    General Tension, Grade properties (Take Note of the Modulus of Elasticity and what that means) and nut/bolt info...https://www.fastenal.com/content/doc...renceGuide.pdf

    I do not believe Tapered roller bearings would be the right application for this.

    Unfortunately, at this point I can no longer point you in any direction other than to find a Structural Engineer, Explain EXACTLY what you want and let him/her Design the system for you. If you build and/or install it is imperative that you follow the plans and mounting Exactly.

    Good Luck,
    PJ
    ‘‘Always do right. This will gratify some people and astonish the rest.’’
    Mark Twain

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  3. #12
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    Traduci

    grazie per la collaborazione ed i giusti consigli, scusami se ti ho rubato tempo prezioso ed ho approfittato della tua pazienza, comunque se altri utenti avessero suggerimenti consigli, li invito a partecipare alla discussione , scusatemi ancora se ho approfittato vostra pazienza grazie per la collaborazione

    309/5000
    thanks for the cooperation and the right advice, I'm sorry if I stole precious time and took advantage of your patience, however, if other users have suggestions, I invite them to participate in the discussion, sorry again if I took your patience thanks for the collaboration

    Help Advice Construction Swivel Arm Jib Crane Hoist-catwalk_jib_arm_hoist_781fbab1-0558-78ea-fda8a3c91363fb40.png

    https://cr4.globalspec.com/thread/81...or-Other-Ideas
    Che tu creda di farcela o di non farcela avrai comunque ragione

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    On Internet Archive you can download,(25.4MB.pdf), [ Machine Design Hoists Hess Rich ] this was published in 1912 but is probably the best book ever written about hoists, cranes & derricks. If you are not conversant with Imperial measurements I suggest uasing a program such as 'Convert' which is one of the most useful I have come across.
    Regardless all the principles apply whatever measurement system is used. Page 225 has a good chapter on the design of a 3-Ton Jib Crane.

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    Help Advice Construction Swivel Arm Jib Crane Hoist-crane-1.jpg

    Help Advice Construction Swivel Arm Jib Crane Hoist-crane-2.jpg

    https://archive.org/stream/machinede...ge/18/mode/2up
    https://archive.org/stream/machinede...e/100/mode/2up

    https://archive.org/stream/machinede...e/102/mode/2up

    https://archive.org/stream/machinede...e/118/mode/2up

    https://archive.org/stream/machinede...e/118/mode/2up

    https://archive.org/stream/machinede.../n283/mode/2up
    pillar crane



    thanks for the suggestion I was sincerely buying the beams to H but I have been too many doubts, thanks again for the help, maybe if you would have pictures drawings with measures of homemade structures already made, you would do me great pleasure and courtesy, thanks again sorry if take advantage of your patience thanks again
    Che tu creda di farcela o di non farcela avrai comunque ragione

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    wizard69's Tools
    I don't want to be rude but you really don't want to be attaching such a load to any concrete column, especially one of unknown construction. At a minimal you will wnat to contact the engineer that designed the building in the first place. The potential for failure is huge. Further more this is a situation where you either buy a turn key engineered solution or do the engineering yourself. In most countries you will be legally liable for any harm done if things break.

    In the USA there are companies selling free standing jib cranes with the engineering already done, that includes the foundation requirements. This is the way to go if you don't want to engage in an engineering study yourself. Everything is laid out for you including rebar, stud requirements, hole depth, hole diameter and what ever else needs to be considered design wise.

    This is one of those DIY projects that really requires proper engineering to be even remotely safe.


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