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Thread: Global Truss upright podium.

  1. #11

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    Quote Originally Posted by Dynamic Entertainment View Post
    Would an 18lbs (8.16kg) bass plate be sufficient do you think Jack, with a footprint of 16x16inch?

    http://www.globaltruss.com/ProductDe...391&Category=9

    Prolight import the Global Truss brand, so they may well get a call for a custom import with their next shipment....
    That will do you.
    I'll try and find where I've seen that product in the UK and let you know.

    As regards the drawing I'm going with what jack says, but instead of 18mm ply why not use chequer plate (or fairground plate as it's also known)?
    The only thing you have to watch is the weight because this stuff ain't light.

    or have a look at this: http://cgi.ebay.co.uk/trilite-quadli...item3f009c01a3 if you find it's unstable just use a peace of 18mm ply larger than the base plate and screw it onto the plate.
    Last edited by Get Me A DJ; 17-06-2010 at 02:15 AM.
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  2. #12

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    Quote Originally Posted by Get Me A DJ View Post
    Jack, where did you get that picture from.
    ...straight from the Global Truss website!

    http://new.globaltruss.com/

    And Steve, IMO I'd be concerned that the base plate you've suggested wouldn't drop the tipping point enough with an upright of 2m and a 25kg load on it. I'd certainly opt for something a little larger, but it's up to you to make that assessment. With a little ballast it may be more than adequate.

  3. #13
    Dynamic Entertainment's Avatar
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    Im thinking that maybe, the base plate i linked to would have adaquate weight, if i get some 18mm marine ply and increased the footprint?

    I dont want to go down the route of adding sandbags because i dont think the hotels would apprecate me draggong that through their function room
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  4. #14
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    http://www.dynamic-entertainment.co.uk

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  5. #15
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    Right guys, maths time.

    Courtesy of my dad (a fabricator), mild steel weighs 0.2836 lbs per cubic inch, so if i use inch thick mild steel;

    2ftx2ft weighs - 326.7072lbs, or 148.2kg (approx)...that is some weight, and i dont want to have to pack a fork lift truck!

    Working on half inch thinkness with the same dimensions, its 163.3536lbs, or 74.1kg (approx).

    Personally, i think a base plate thats 3 times the weight of the fixture 2m upshould be enough.

    What do you think?
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  6. #16
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    Quote Originally Posted by Dynamic Entertainment View Post
    Right guys, maths time.

    Courtesy of my dad (a fabricator), mild steel weighs 0.2836 lbs per cubic inch, so if i use inch thick mild steel;

    2ftx2ft weighs - 326.7072lbs, or 148.2kg (approx)...that is some weight, and i dont want to have to pack a fork lift truck!

    Working on half inch thinkness with the same dimensions, its 163.3536lbs, or 74.1kg (approx).

    Personally, i think a base plate thats 3 times the weight of the fixture 2m upshould be enough.

    What do you think?
    I think you won't lift 75Kg twice. The first time will convince you of your design flaw. I'd say 6mm plate will be more than heavy enough, if your density figures are correct.
    Excalibur. Older than the average DJ.

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  7. #17

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    IMO 2' x 2' of 1/2 inch plate won't weigh any where near 74 Kilo check the calculations again. A solution worthy of consideration, is to fit small castors to the corners of the base plate, anyone bumping into it will move it rather than tip it over. It's very difficult to tip somthing that can move in the direction of the force.

    Just done the calc it's 36.57 K
    Last edited by Pe7e; 17-06-2010 at 08:47 PM.
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  8. #18
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    Sorry, my maths is right...but my english is a mile off and my heads all over the place

    The 74.1kg should have been working on 1 inch thickness, so half inch is approx 37kg.

    Thanks for pointing it out peter.
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  9. #19
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    Quote Originally Posted by Dynamic Entertainment View Post
    More for Shaun whos watching the thread...

    Indeed I am. Cheers Steve.

  10. #20

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    Quote Originally Posted by Pe7e View Post
    A solution worthy of consideration, is to fit small castors to the corners of the base plate, anyone bumping into it will move it rather than tip it over. It's very difficult to tip somthing that can move in the direction of the force.

    Just done the calc it's 36.57 K
    Good idea, but what happens if they knock it hard and it goes whizzing off pulling cables with it.
    I think it's a health and safety hazard IMO.

    Better to have it fixed to the floor as it's more stable.
    If I'm talking to much, tell me to shut up!!

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