Weight limit for 1/4" plate?

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I was wondering if anyone knew about a formula I could use/online calculator for determining the strength of a 24" x 70" sheet of 1/4" plate?I wanted to place a 1200 lb wall (measuring 5' wide x 7' tall x 15" deep) on top of the plate and float the plate about 2" from the ground. I planned on spacing the plate from the ground by sending bolts through the 4 corners and middle of it. I was not sure whether the 1/4" would bend under the 1200 lbs of the wall, or what the correct terminology would be for searching this information on online.Again, the base of the wall measures 5 feet long by 15 inches deep and would sit in the middle of a 24" x 70" 1/4" plate so the plate would extend about 5" from the wall on all sides.Edit/Delete Message
Reply:I think supporting the plate is going to be more of a factor. "How much weight can this hold" is kind of an opened ended question, there are too many variables. If it is supported properly, it wont bend.Thermal Arc 210Thermal Arc 95SLincoln Weld Pak 100
Reply:I'll move this here since Steve posted to this 2nd thread while I was replying to the OP's 1st one and delete my reply there.It's been too many years since I had to do those calcs for me to figure this out. At 1st thought I doubt the plate is enough on it's own. However the wall may help support some of this and complicates the calculations some.The wall itself ( I assume it's stone/block) will probably act like a beam, and carry some of the weight over the length, so the plate itself doesn't need to support the weight over the whole span, only over a shorter length, so that will help. However, that wall will not support the weight until it sets up and cures. If the plate is going to bow, it will do so under construction, probably near the end of construction when the most weight is on the plate, but the mortar is only starting to set up. If the wall hasn't completely cured, but has started to set when this happens, chances are the mortar will crack and compromise the strength of the wall. Many times masons will form up under brick ledges and so on until the mortar sets and the block/brick can support some of the weight. Under a short height plate, traditional shoring probably isn't practical, but something like sand is. Lay a bed of sand under the plate and compact it level. Set your steel and build. Then after the wall cures ( usually 30 days), you can always take a hose or pressure washer and wash out the sand from under the plate.A 2nd option would be to do a stiff back that gets buried in the wall as it's built. This would stiffen the plate below, yet not show when done. It can probably be done like a truss so the block can tie together from side to side if needed..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan