Hand signals are used to transmit instructions from a spotter on the ground to the crane operator high above. Here is a poster illustrating those hand signals, courtesy of the California Crane School. Feel free to post it at your job site, or to have any of the images tattooed onto your forearms.
posted by mudpuppie on Apr 14, 2009 - 30 comments

6x4x2 wheel configuration with Ackermann steering and hybrid live-axle suspension. Telescoping boom. Impressive 1kg lifting capacity.

Jennifer Clark builds amazing things with lego.
posted by 7segment on Feb 17, 2009 - 13 comments

Craneporn is a collection of photographs of cranes.
posted by hama7 on Nov 1, 2003 - 14 comments

Cranespotting (Geocities) ... is the compulsion, upon seeing a long crane boom reaching skyward in the distance, to drive over and see what's holding it up. The crane capital of the world is Germany, where Demag, Gottwald, Krupp, Liebherr and others make some cranes with eye-opening numbers: more than 60 feet long, with 10 axles, and able to lift 1,000 tons. Now sometimes cranes tip over, touch power lines and so on; and there's a website for that too.
posted by kurumi on Jun 12, 2003 - 7 comments

"CraneAccidents.com is the Official Web-site for reporting crane related accidents on a world wide basis. The site is loaded with photos of crane accidents."
posted by kirkaracha on Mar 27, 2002 - 18 comments