Rant: Wind speed ratings are way lower than what rigs actually handle, found this out the hard way in Odessa

I was running a 100 ton Grove out in Odessa last month, pushing a load through some pretty stiff gusts. The book says 25 mph max for this setup, but we had 30 plus for a solid hour. I figured I'd just slow down and be careful. Then the spotter flagged me down and showed me the load cell data from the site trailer. We were running at 87% of tipping moment on a lift I thought was maybe 60%. That number floored me. I always knew the ratings were conservative, but that close to the edge without feeling anything in the cab, that's what got my attention. Has anyone else actually pulled load cell readings versus what the rated chart says on older cranes? I'm wondering if my machine's chart is straight up outdated.

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fiona_murray16d ago

Did you check the serial number against the manufacturer's updated charts before you ran it? I found out the hard way years ago that Grove reissued charts for some of the older 100 ton models after they tested them with the newer load cells, and the difference was around 8 to 10 percent on some boom lengths. Once I pulled the actual revised chart from their site and compared it to what was glued in the cab, mine was way off too, especially in the higher radius ranges. That 87% reading you saw might be closer to the real limit than your paper says, so it's worth calling the dealer with your serial number before you trust that old chart again.