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Thread: How to calculate distributed point load for a cantilever?

  1. #1
    Associate Engineer
    Join Date
    Sep 2015

    How to calculate distributed point load for a cantilever?

    Hi All,

    I'm working on designing a light mount for an aquarium. The L shape rod (cantilever - Only attached at one end.. to the stand) .

    The span will be about 5.5' and will have 3-4 point loads of 3-5lbs each (lighting fixture)
    The vertical bar will be bolted to the stand below the tank. The height from aquarium stand to light fixtures will be around 24"

    Is there an easy way to calculate the size of tubing to accomplish this with out any sag across the light bar?
    What material/square tube size/gague should I use?

    Could this be done with 1 or 1.5" square steel tubing? If so what gauge would you recommend?

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  2. #2
    Technical Fellow Kelly_Bramble's Avatar
    Join Date
    Feb 2011
    Bold Springs, GA
    Well, the equations on the following webpage should be helpful.

    Lifting Boom, Davits Equations
    Tell me and I forget. Teach me and I remember. Involve me and I learn.

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