Caterpillar CAT 226B Skid Steer Loader - Building Demolition - PHSH - Abandoned Hospital (Presidio, San Francisco)
A skid steer do not have a driving wheel and orientable wheels like cars. In order to turn (i.e. steer), the driver uses levers to change the rotation speed of the two wheels on one side vs the other side, causing it to skid. By having the wheels on one side turning in one direction and the other side in the other direction, a skid steer can turn on the spot. Skid steers use the same technique as tanks or crawlers excavators, except that they use wheels rather than tracks. This technique allows for a much simpler and more robust drive train and increase maneuverability, but does not allow driving it at high speed and it only works well when the front and back wheels are close, i.e. on very short wheels base vehicles.
This development project is called Presidio PHSH Adaptive Reuse Housing.
The Public Health Service Hospital (PHSH) is located in the Presidio of San Francisco. It has been rehabilitated into luxury condos housing in 2010, and it is now called "Presidio Landmark Apartments".
For more information about this place you can visit my PHSH page.