quote:

Originally posted by KML:

quote:

Originally posted by sigarmsp226:
Marksman - Do not purchase this shelving - ask me how I know. The pressboard they call shelves will start to bow within a couple of months from the weight and within 8-12 months you will hear a loud noise when the shelf giveaway.

Spend the extra and get shelves that have wire supports. You can use as is or add a thin ply board on top to allow your ammo cans to sit and slide more easily….

I wish I had pictures of the three sets I had that I used for various items. All warped and with you being in the south they will warp even faster, even if used in an inside area….. All three sets were trashed and I replaced them with the following shelf units and they are rock solid….

https://www.lowes.com/pd/edsal...ving-Unit/1001326526

This is the one I got. It’s great! Most of the weight is on the bottom two shelves ,I weighed each ammo can and have 1000lbs on each of the bottom 2 shelves. Mostly boxes of magazines and holsters on the top.

I'll offer these shelves at Sam's Club as an option as well.

Quick specifications: 4 shelves, 60W x 18D x 72H, 1800 lb per shelf.
The "feet" are slightly bigger than those of the OP's shelf unit (better weight distribution). If worried about distribution at all, I'd slip a length of 4x4 under left and right "leg pairs."

quote:

Originally posted by marksman41:
Thanks guys. These are the shelves I'm looking at getting, although I did see some with wire decking that might be a good solution as well.

https://www.homedepot.com/p/Mu...-UR-185PBB/305553549

Each shelf can hold 500lbs. and best guess of what I've got in total might be that much.

Those are a no go unless you modify them. The metal parts are fine,
the shelves are 3/8 particle board. The pb will collapse.
I saw a review on the wire shelves, a 45lb box bent the wire.
1/2 or greater plywood makes the shelves MUCH stronger.
I use 1/2 plywood to hold stacks of canned goods, with no issues.
I guess you can figure out what happen to the original pb shelves.

quote:

Originally posted by PeteF:

quote:

Originally posted by marksman41:
Thanks guys. These are the shelves I'm looking at getting, although I did see some with wire decking that might be a good solution as well.

https://www.homedepot.com/p/Mu...-UR-185PBB/305553549

Each shelf can hold 500lbs. and best guess of what I've got in total might be that much.

Those are a no go unless you modify them. The metal parts are fine,
the shelves are 3/8 particle board. The pb will collapse.
I saw a review on the wire shelves, a 45lb box bent the wire.

This is what I use for my ammo cans:

https://www.homedepot.com/p/Hu...BR652454W3/310651476

The shelves have wire decking, and I guarantee that a 45# box won't bend it.

Each shelf is rated for 2500 pounds.

The question about concrete was not answered with any engineering calculations. I like engineering, so allow me to attempt an evaluation.

Let’s look at the typical shelf upright standard. It is often material bent at a right angle, with a nominal material thickness. While wolfing down my oatmeal I cannot measure the shelf I have, allow me to estimate a material thickness of 0.0625 inch, and a right angle upright having a total length of 2.5 inches. This upright has a cross-sectional area of 0.0625 x 2.5 or 0.156 square inches. With four legs, the total metal area contacting the floor is 0.625 square inches.

Now, we can estimate the total load corresponding to 3000 pounds per square inch. This is 3000 x 0.15625, or 469 pounds. The total shelf load at that concrete compressive stress limit would be 1,875 pounds (4 legs x 469 pounds).

The oft-touted weight limits on each shelf are related to shelf bending and shelf material stress limits, not concrete compressive stress capacity.

To create a low stress solution, the uprights could be set on any wooden or metal plate transferring the vertical load to a larger area. This is not unlike the plates affixed to motorcycle sidestands to prevent the stand from sinking into the soft parking earth.