Constrain to within dimensions

I have a block that I'd like to be able to keep within the dimensions 4'x8'. The block is in the attached file as Sheet Stock

All 4 points need to be able to be moved independently, but the overall shape needs to be able to fit within 4x8. Ideas?

File008.dwg

In the block editor, right-click the Distance linear parameter (looks like a dimension) select properties, in the Value Set pull down set Dist minimum and Dist maximum.

Well, I have to have the dist max set at 8'-11 9/32"; this is because if I bring the top left point towards the right side of the block, the distance of the left side grows above 8'. However, the overall measurement of the unit is still under 8'. Still with me?

The overall point is to have a block that represents a 4x8 sheet of plywood that I can bring the corners in to specified shapes, but never stray outside the parameters of a 4x8 sheet of plywood. Now, I have the block and drop one side straight down, I can go all the way to 8'-11 9/32". Or, if I have a parallelogram, the overall measurements would be over 8', depending on angle.

Did you follow my instructions?

Post your dwg file with your latest block.

No, If I follow your instructions, then I won't be able to move the grips along the top of the block, or the bottom of the block. It will be locked into 8' for that line, and not keep the overall 8' for the block.

You could put two linear parameters on each side, stretching from the midpoint of the 8 foot edge. Each stretch parameter would have a maximum value of 48" from the center of the sheet.

Other than that, it seems you would have to put some type of constraint between opposing corners that could not exceed the diagonal distance for the 4' x 8' sheet (~8'-11 5/16") but I don't know if that's even possible?

Nah, I think that would make it harder to transfer the overall length to an excel table. I think that the only thing that I can do is to add in a visibility state that includes a constrained 4x8 box so that you know, as the drafter, that you have gone outside the dimensions of the 4'x8'...