Posted by docmirror on December 07, 2021 at 11:26:30 from (75.3.255.251):
In Reply to: U-make-it ROPS posted by docmirror on December 06, 2021 at 16:45:11:
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I like that one. Incorporates a roll bar turned sideways on each side. Should work pretty well, if the tractor does the pitch-pole. Most rollovers I presume are to the side, but I see the roof would provide some stiffness. The stamped steel ROPS I looked at in the catalog were about 11Ga, although most of them were 3" sq or round. Thankfully, the torsion and modulus compared to .250 wall 2" is pretty close. Natch, because it's a small xsection, the 2' sq does look less rigid, but the eng specs tell the story.
The only thing I might add at this point is a cross brace from top left, to lower right, as it's welded to the uprights for the loader. They are bolted to the axle with four 3/4 bolts each side. I might test it with a cable and lift it sideways off the ground, take some measurements and see if there's any deflection, but I'm sure it'll stay rigid. Not going to rollover test it, as I need the tractor.
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