top heavy
top heavy
(OP)
I'm trying to calculate this. I have forgotten how. Will somebody please give me a link that explains how to do this?
This link explains what I'm trying to do
http://content.screencast.com/users/dchristensen77...
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RE: top heavy
Cheers
Greg Locock
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RE: top heavy
See problem 10 b).
Ted
RE: top heavy
See page 4 of this link
http://www.kmitl.ac.th/~kbnavaph/food/file/static_...
RE: top heavy
RE: top heavy
We have racks similar to the one in the link
I want to remove the bottom shelf so that we can park things under the pallet rack. I'm told that this isn't allowed and wasn't given a reason. I assume it is because the rack will become top heavy. I want to make modification to the rack to compensate.
I.E. If the rack is depending on the bottom shelf to be loaded with 1 tonne, I would like to remove the bottom shelf and anchor down the feet with bolts that will equal 1 tonne tensile strength.
http://www.google.com.au/imgres?imgurl=http%3A%2F%...
RE: top heavy
RE: top heavy
Our rack is taller and has 3 shelves. I want to remove the bottom shelf so that I can park product under it. Note the blue bracing will be different to the green bracing. I will anchor down the feet better as well.
http://content.screencast.com/users/dchristensen77...
RE: top heavy
I think your idea is fairly sound as I doubt the majority of these things actually bolt the feet to the floor. Removing the lower shelf will raise the centre of gravity of the whole rack, but so long as that C of G doesn't go beyond the outer edge it won't fall over on its own.
Until though you nail down the issues behind the fact that "I'm told that this isn't allowed", you probably won't get very far even though there is presumably no guarantee that the bottom shelf would always be loaded if higher ones were also loaded.
The only other issue is whether in the past they have had accidents either because there was some sort of jolt on the rack and it caused a collapse or if the feet are not fixed, they could splay out or buckle.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: top heavy
RE: top heavy
Thank you. I'll do that after I have done a bit of homework. I.E.
What are the dimensions of my pallet rack?
What is the weight of the heaviest pallet?
What is the maximum moment of the column?
RE: top heavy
http://xternal.me
RE: top heavy
1. Make a graph of force vs. angle as the "box" is pushed and rotated around the corner. Force will decrease as CG reaches tipping point. Excel is great for this. You may want to make a series of graphs for various contact points.
2. Calculate the amount of energy needed to raise CG up and past tipping point. This can tell you how long a force must be applied before it's too late to stop.
The buckling issue... do be careful.
RE: top heavy
1. Make a graph of force vs. angle as the "box" is pushed and rotated around the corner. Force will decrease as CG reaches tipping point. Excel is great for this. You may want to make a series of graphs for various contact points.
2. Calculate the amount of energy needed to raise CG up and past tipping point. This can tell you how long a force must be applied before it's too late to stop.
The buckling issue... do be careful.
This sounds interesting. I partially understand. Will you send me an excel file as an example?
Without friction, it'll just slide.
The feet are bolted down to the floor. It won't slide