That umbrella was made to be mounted on a wooden deck. It has a base which is actually a short pipe slightly larger than the pole. The pole slides into the base with a clamp to hold it in position. The base has a flange with four screw holes which I have screwed to the floor of the trailer. Makes for a quick red-neck shade tree on the work site. Gotta take care of the little buddy, you know, and his great grandparents.
My wife picked up the umbrella at Publix supermarket.