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Thread: Help Advice Construction Swivel Arm Jib Crane Hoist

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    PJs
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    the reinforced concrete pillar is about 5 meters high with a square cross section 50 x 50 cm, I would like to realize the structure in H beams what do you recommend? I have to build the hinge for the rotation of the arm to the pole, which will be anchored by threaded dowels to the foundation beam and bolted to the reinforced concrete column by means of brackets and 20 mm section threaded bars
    tables beams to h
    The pillar construction is most important i.e., rebar size & amount, type of concrete, the depth of anchor into the foundation/ground and what it is supporting above. In your second picture and description it looks that you will be using H beam for the vertical support. Additionally you must keep in mind that your pillar loading is at ~2/3 of the height of the pillar...a different set of calcs are needed for that position on the pillar. Personally I would use heavy wall SQ tube because of the swivel loading and oscillation issues. It should also be anchored or inserted (Footing-some depth?) into the floor and possibly the ceiling and might be wide steel plate strapped to the pillar...any drilling into the pillar will compromise its integrity.

    The saw tooth design of your support looks to be adequate but keep in mind the torsional issues for choosing the type of material (shape) for building it. Also keep in mind the size of the pins for the swivel hinges to support all that weight.

    Build it like your life or someone you love depends on it.

    PJ
    Last edited by PJs; May 2, 2018 at 04:59 PM.
    ‘‘Always do right. This will gratify some people and astonish the rest.’’
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