These Self-Erecting Tower Crane Pads are 8″ x 78″ x 78″ and 8″ x 38″ x 39″ in size. They are built with Douglas Fir 4×6 timber and D fir plywood and a plethora of heavy galvanized ardox spikes. Don’t build these in your garage at home, they will never be as square and tight fitting and great quality as we build! To use these are layed on a  good surface, with the large one on the bottom, smaller one on top and then a steel plate on top of that and then the outrigger “foot”