Lift placement

I’d like to be able to lift a crew cab long bed but it’s not a necessity, more of a want. Where the lift is going to be mounted is 12in deep and the entire floor is 4000psi concrete. I should probably mention the doors are 10x10 feet and they’re metal roll up doors that roll up into themselves. Side walls of building are 12ft tall and the peak is just shy of 15 feet.