interesting rig working just a few miles from me this morning
Nice pics petepilot. Must be a dairy/ cheese plant? Just guessing by the stainless tanks. The big crane is running what they call a y wing, mega wing, super lift (depending on what brand of crane it is). What it does- is act like a back boom or lattice guy cables, making the main boom much stronger. They are a pain to install on the crane, which they do onsite before making the lift. Usually a optional attachment on cranes 300-500 ton capacity.
thats a whitewave dairy processing plant` have seen that crane there before but without the wings
I've been around one on a Liebherr 360 ton, we installed it once in the four years I worked there. Its just so rare that installing it, gets you the extra chart needed to make the lift. Usually if you can't lift it in the regular configuration, installing it isn't going to get you enough either, you just need a bigger crane. But once in a great while, its enough to get the job done.
That sounds like a lot of cost to something with marginal marketability or is it one of those tools that on certain jobs that is the only tool for the job as opposed to a bigger crane
Don't they need a LMI on the gantry wing ropes because the gantry drum is behind the boom pin, so when the boom angle is changed, the tautness of the gantry ropes changes greatly. This type of configuration really wasn't possible until cranes got computerized in the 1990's.
I don't think there is actually a winch on the back cables. I think there are cylinders in the heavy/ big boxes (you can see the hoses on them by the main boom), and they telescope those out to tension the main boom, and then that back assembly is all on the boom and moves with the boom as it changes angle. Essentially they are just making a huge truss brace on the main boom. And its a expensive option when buying the crane, but if you're dropping 2-3 million anyways, you just as well have all the options. Because if you don't buy it when its new, its almost impossible to find a used one, or get the manufacturer to build you one. And if you have that kind of $ wrapped up in a crane like that, you don't want to miss a job for it, because you don't have the mega wing.
They certainly do have winches, they winch as the boom telescopes. On the Grove version (never been close enough to any of the other makes to eyeball them) they have hydraulic pawls to lock them in. The cylinders are to set the angles.
http://www.maximumreach.com/Lifting Heater Section With Guy Derrick Four Rear Guys.pdf I might be a bit off topic here but if you are interested in old school complicated options to really boost capacity check this out. American Guy Derrick System , It was even offered on my 5530 / 75 ton .
Wow! Thanks. Your name wouldn't be Robert N would it?
Wow,so beautiful!
That was a nice piece you put up
heres what i ended up with for my excursion to ark. and mo. last week
The road gets a lot better once you get north of me a little ways. That ride up 7 is a pretty drive. Glad you made it home. Looks like a pretty clean little truck, little cat or cummins?
truck has a paccar eng. the blowhard has a qsx 15 cummins. and i have to say you could not have a more appropriate surname for the business you`re in
I took a few pics . on the way up will get them up soon as i remember to grab my other camera out of the truck
not the best but not real bad. little disapearing roadway repair also
another high long reach machine at white wave yesterday
It looks like a "heavy jib". What they do is take the larger jib sections from a luffing jib on a 300 ton crane, and use them as a fixed jib without the luffing attachment. The guys I do some work with have a Grove 300 ton gmk that has the heavy jib that you can use fixed. Liebherr uses two different sizes of boom on the luffing jibs on their 300 ton plus cranes also, but I don't know if they have a configuration where you can use the heavy luffer jib as a fixed jib.