New Giant 5-8 joints 3x2x1meter Overhead Gantry

I would be tempted to make the cross braces full-height and have the buttresses reach all the way to the rails.
But that would mean a lot more material, probably for little gain.

Have you seen this gantry? It's just like a hobby design, but a lot bigger:
forum.linuxcnc.org/media/kunena/attachme...3/DSG-compressed.pdf

first shot render
the mashine is used to do bigger parts of hardfoam wood molds

Hi pl7i91
I fear this construction will shake a lot. You have to stiffen it with diagonal truss.
M5C
Mike

agree there will be alot of more things to get side stiffnes trust me
its a start to calculate material

i only need one side open that is the main problem to get the parts in
with a forklift

maybe a rail system at the bottom and then get it in from there
we will see how it comes

the WOOD is very cheep so no pricing on that

You could retain access while making the structure much stiffer by triangulating to the floor. I admit that it doesn't look especially elegant.

I would add cross members to dampen the vibrations a bit, but that is just me.