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/sci/ - Science & Math

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5811427 No.5811427 [Reply] [Original]

/fit/ here.

I'm looking to make a super cheap squat rack, and I've had an idea that may or may not work; I'm leaning toward the latter though.

I'm planning on filling 6 of pic related completely with either sand or gravel and stacking 3 up like stairs on either side of me. I would rest the bar on top of the two containers and use the lower container as a safety to catch the bar if I fail a squat.

I'm worried that the weight of the barbell acting downwards on the container would compress the material on the inside and push out the sides, like it would with water. I'm not certain if course sand or gravel would act in the same way though.

tl;dr
Do things like sand, dirt and gravel behave like fluids under when they're compressed in a container?

>> No.5811430

>>5811427
Those containers can't handle that much weight
150-200 lb max

>> No.5811433

>>5811427
If the container is of decent quality (e.g. more than $30) it should be fine, if it's those cheap as fuck ones (which I think you're talking about) then it's going to happen.

>> No.5811437

i used those exact same rubbermade containers to make a trebuchet using them as counterweights.

i discovered quicly when filling them with sand they will not hold thier shape and will bulge out on the sides.. theres no possible way you could fit a lit on it,

it might be possible if you added a material that would harden and hold its shape... or stacked say 3 or more containers inside eachother and then filled with sand.

but my best advice for you is stop being an idiot.. go buy a jigsaw, some 2x6s and an electric drill. total cost about 80 if you get them at a pawn or even cheaper if you just borrow from a friend or use your school shop.

then you can build a very sturdy stand, wood working is not hard

>> No.5811444

>>5811427
I don't think there are many people versed well enough in chemistry to answer your question scientifically. State and behavior of matter is not /sci/'s strong suit, IMHO.
Then again I don't doubt i'll be proven wrong

>> No.5811448

>>5811437
>my best advice for you is stop being an idiot.. go buy a jigsaw, some 2x6s and an electric drill.
>then you can build a very sturdy stand, wood working is not hard

/thread