"Levitated Mass" is the name of a gigantic art undertaking at the Los Angeles County Museum of Art that couldn't be completed without the aid of three semi trucks, a trailer with 200 wheels, and the cooperation of four counties and 22 cities. Before the centerpiece of the project -- a 340-ton granite boulder -- could be installed, it had to be transported more than 100 miles into one of the busiest cities in the world.
When a quarry explosion unearthed...
When a quarry explosion unearthed a 685,000-pound granite boulder in 2007, artist Michael Heizer found the showpiece for his 44-year-long art installation project.
A giant boulder may not sound like your average art supply, but "Earth art" specialist Michael Heizer doesn't shy away from size. This new project, "Levitated Mass," is by no means small, but he also has a project that's more than a mile long and a quarter mile wide. Located in rural southeastern Nevada, "City" has been under construction since 1970. "Levitated Mass" has been in the planning stages for even longer, with the idea first conceived in 1968. Heizer first attempted the project in 1969 with a 120-ton boulder, which broke one of the two cranes trying to set it in place. In 2007, Heizer was working at a quarry in Riverside County, California, when the 340-ton megalith that will become "Levitated Mass" was unearthed after a detonation.The (Very) Big Rig
This rendering is a conception...
This rendering is a conception of the “"Levitated Mass" installation. It refers to the project as a piece that "destroys 'Gestalt' concepts" and "adds third-dimensional view/access to object from beneath/all around."
A piece of earth this size cannot just be loaded onto a flatbed medium-duty truck, or even on the bed of a single semi. To transport the megalith, Emmert International had to load it with straps, chains, and anchors supported by parallel beams that look like the giant arches of a two-lane bridge. To move the trailer, one Kenworth semi truck was used to pull, with two more Kenworths to push. Each truck has a gigantic diesel engine with about twice the displacement of a 1-ton civilian truck. Those powerplants are capable of putting out twice as much torque, too, with impressive numbers that range from just over 1000 lb-ft up to nearly 2000 lb-ft of twist. That power wouldn't be needed for speed, though, since the three trucks would be teaming up for a slow crawl with a transporter about 32 feet wide and 260 feet long.
A (relatively) low underpass...
A (relatively) low underpass in Chino, California, near the 71 Freeway, was one of the challenges that brought people out to watch the megalith travel through the neighborhood.
The rock was moved only between the hours of 11 p.m. and 5 a.m. to minimize the effects on the notorious traffic that snarls Los Angeles streets on a daily basis. That didn't stop it from stealing the hearts of Angelenos who followed the boulder along its trip. The gigantic mover crept along at just 4-8 mph during 11 nights in a path that avoided freeways, ramps, and streets that could not bear its weight or width. This included stops for planned and unplanned obstacles, including large palm trees that had to be moved temporarily, and a bunch of illegally parked vehicles that blocked the mover on the last leg of its voyage. The Los Angeles Times reports some people among the crowd of onlookers cheered when the first vehicle was towed from Wilshire Boulevard, where LACMA is located.
The boulder's temporary resting place is a lot with a partially constructed observation trench that cannot be completed until the boulder has been put into position. When finished, the slot will be 456 feet long, 15 feet wide, with 4-foot-thick walls, and 15 feet deep directly under the megalith so viewers can walk underneath the boulder and feel as though the mass is hovering over them.
Like the rest of this project, nothing was simple. The location of the display area is very close to La Brea Tar Pits, so what's under the surface of the earth had to be taken into account. The artist's wishes to have the boulder tilted at a specific angle presented seismic challenges to the construction consulting company, Buro Happold. They used 3-D laser scanning of the megalith to make sure it won't move in the event of an earthquake, while keeping a safety anchor system out of sight for artistic purposes.
See It for Yourself
As of press time, LACMA's plans were to display "Levitated Mass" to the public by the end of spring or the beginning of summer. By that time, the lot surrounding the display slot will be covered with a naturally occurring gravel called compressed decomposed granite. The museum is closed on Wednesdays, and tickets are available online at www.lacma.org.
|Megalith and Mover Specifications|
|Weight ||340 tons |
|Height ||21.5 ft |
|Width ||21.5 ft |
|Slot length ||456 ft |
|Slot depth ||15 ft |
|Slot interior width ||15 ft |
|Slot wall thickness ||4 ft |
|Truck and Trailer|
|Truck manufacturer ||Kenworth |
|Trucks used ||1 tow and 2 push trucks |
|Approximate horsepower ||300-500 hp per truck |
|Approximate torque ||1000-1900 lb-ft per truck |
|Length ||260 ft (est) |
|Width ||32 ft |
|Number of wheels ||200 |
|Average speed during move ||6 mph |
|Max speed during move ||8 mph |
|Length of transport ||105 miles (est) |
|Time required for transport ||11 nights (11 p.m. to 5 a.m.) |