Heavy lift ring crane - video

[Jon]

Heavy lift ring crane.




Previously:

Motion compensating crane for moving cargo containers at sea - GIF
enormous oil rig crane
ATV log crane
Skid steer dangling from crane, breaking concrete - GIF

[Drew1966]

Very rare to see a ring crane these days as they are VERY expensive and most engineers design things so that they don’t need such high lifting power. Probably petroleum companies installing stills (such as in the video) are the only companies that can afford them. Even most large stills are built as modules these days so as to save costs and also as it gives more flexibility for production.

[Toolmaker51]

There seem always to be conventional tower cranes working here in Kansas City. A larger footprint like a ring crane seems far more stable, especially when they rotate to place a load. Get a load of the stacked counterweights on the rear carriage!
Somebody, get doughnuts for the crew that got such a large anchor bolt pattern and the mating ring to coincide.
No thanks, think I'll continue working with my feet on the ground.

[Jon]

Hammerhead crane.

Fullsize image: https://s3-us-west-1.amazonaws.com/h...e_fullsize.jpg

[Squeak]

I would use caution taking photos of the shipyard. Photography of the actions of the shipyard are prohibited.

[volodar]

I would use caution taking photos of the shipyard. Photography of the actions of the shipyard are prohibited.

Prohibited? Where, and by whom? I live in Canada, a free country. Sometimes I take pictures of fascinating shipyard setups in Victoria on Vancouver Island. Can't speak for the place next door.

[12bolts]

I would use caution taking photos of the shipyard. Photography of the actions of the shipyard are prohibited.

2nd most ridiculous thing I've read today

[Toolmaker51]

I would use caution taking photos of the shipyard. Photography of the actions of the shipyard are prohibited.

Comments are running that poo-hoo this advice. I think what Squeak may not have emphasized are particular yards with a very limited choice of paint schemes [grey or black] on what they produce.
I worked for those commissioned in disposal of properties in Long Beach Naval Shipyard. Classified material and tooling had been removed before buyers ever came aboard to view what was available. What remained still represented astounding capabilities all ' under one roof '.

[PJs]

There is a cone in the foreground that looks vaguely familiar. Perhaps photos' of that would be considered a bit testy.

PJ

[mklotz]

[QUOTE=PJs;115473]There is a cone in the foreground that looks vaguely familiar. Perhaps photos' of that would be considered a bit testy./QUOTE]

In San Diego harbor the drydocked submarines always have their propellors tented. Keeps the Russian spy satellites from taking high resolution photos from which dimensions can be derived. ( The tourists armed with smart phones on the harbor cruises are disappointed too.)

Perhaps the ogive-shaped dome is a similar cover for something more interesting. Frankly, I think it's absurd for any shipyard to expect privacy for anything that isn't shrouded. Laws only work if the public chooses to obey them.