Getting New Tires -- Jack Up Points For Installers To Use?

I have a 12 ton shorty hyd jack sold specifically for jacking trailer axles. It comes with a 10"x10" base and a adapter similar to pipe adpter only its a short leg channel.
The 12t shorty came with a long folding jack handle that allows the jack to be slid in position or removed without having to lay down or go under the trailer.
The jack is about a mid '70s model and was sold as a Truckers Special.