Thanks, liebherr....
You know a lot more than cranes than I, but I know trees. Based on what you said (and I understand the pricing and how to pay for a lower rated crane by not using the full CW complement), the main mistake was the way the climber made his cut. I explained the proper way, which most likely would have been fine.
The piece that was cut may even be less than 6000 lb, as it doesn't look huge. (You should see some of the picks I do with my favorite guy, who only has a 23 ton truck mount. As long as we're close, we pick 5000-10,000 lb with it routinely (vertical picks, no dynamic loading)
Here's the relevant load chart. I think page 10 0r 11 may be close...but maybe there's a better page showing the jib.....
http://www.maximcrane.com/loadcharts/4 All Terrain Cranes/Grove/GMK-5175_175T.pdf
I think I know why it might be better to not have full boom extension, but to fly the jib....Is it because it's lighter?[/QUOTE]
Thats the theory ..
These a sale's brochures and not to be taken as actual load charts for the machine.. In the brochure there is no 131/33 ft combination with that counter weight ..which kinda stumped me first ..
But then I strolled over to the 150 Krupp.. and found no 136/33 combo ..And I know its there in the machine ..I can put jib in that in my sleep
The brochures are OK for examples ..but I really would like to get the chart out of that crane ..
That 175 and the 150 Krupp have alot in common ..Grove bought Krupp ..and even that 175 now that i saw all the other pic's shows its Krupp linage ..
I'll await my flogging here ..but on a limb (so to speak ) that crane is 15 yrs old ..+/- 2 yrs.. shame ..