Shop Press Mod for pressing on overhangs?

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I'm trying to think of concepts for a shop press mod to press on overhanging material of various lengths (up 16'' overhang).  I'm thinking something like the following circled in red below:

But strong enough to withstand up to 5000lbs of force.  How this would be used is the material to be pressed on would be strapped down to the shelf above with the overhang of desired length hanging into the center.  So the shelf would have to be adjustable horizontally to achieve the different overhang lengths.  Anyone do something like this before? Any ideas for making this safe as possible?
Reply:You didn't mention so I'll ask:  will the portion that is being pressed on actually be supported by the standard double-C-Channel support in the middle like in typical usage?

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Reply:No, unless the support can be extended out 16'' and I use that instead of some makeshift shelf. Here's a clearer (still crude) image of what I need to do:

Last edited by beginnerman; 15 Hours Ago at 12:46 PM.Reason: added more detail to image
Reply:Maybe show us a pic of the material and bend(s) you wish to achieve.  Sent from my iPad using Tapatalk:
Reply:

Originally Posted by Lis2323

Maybe show us a pic of the material and bend(s) you wish to achieve.  Sent from my iPad using Tapatalk
Reply:Are your pressing a long shaft into an object and is that why you need the length? Pics are pretty much required.  Is there any way to also, clamp, hold the bottom piece horizontally? Can you then use a porta  power unitPics or it's all just guessing. Sent from my SM-G996U using TapatalkMillermatic 252 MIGMiller Dynasty 200DX TIGMiller Spectrum 625 PlasmaAltas 12x36 Metal LatheBridgeport Milling Machinewww.psacustomcreations.com
Reply:For some more explanation:- I do not want to go all the way down to the bottom. This is just the only image i can find of someone doing something similar to what I envision. - I have some material that needs cantilever bend testing (i.e., must be supported only on one side, with the side that is being pushed on hanging freely). We are simply pushing down on the material to break it.- Since the shop press only pushes down in the middle, I hope to put something together like the shelf in the image that sticks out to the side.  Our material will be strapped down to the shelf, with the overhang/cantilever going towards the middle, so I can push down on the free hanging edge of the cantilevered materialHope that helps. I can try to get a representative image tomorrow.
Reply:Cantilever is a virtual "NO-NO" when it comes to a force greater than your shoelaces,,,Cantilever is an extraordinarily low cost assembly technique,, if it could be used, it would be used, equipment companies do not throw away money just for looks.Compare what you are proposing to the receiver hitch on the back of a 3/4 ton truck, that is pulling an 8,000 pound trailer.The hitch ball of the receiver is WAY LESS than 16" of cantilever, and those hitches are only rated for 500 pounds of vertical force.You want something ten times as strong as the receiver hitch on the back of a truck.Bring in a bulldozer, park it there, and connect your 5,000 pound cantilever force to the blade,, hopefully, you will not damage the dozer blade,,but,, damage is possible,,