This method of of supporting cars in yards is basically the same as having 4 jack stands under the car, but with a much larger base. They generally have 1 rim horizontal and another vertical in the center to the other and then weld the 2 together. It lifts the cars body about 3 feet off the ground.
Somewhere there's a DC10 struggling to get off the ground. I'm not a fan of wings on street cars, I like low key spoilers, but not something that you have to custom order from Boeing.