Umbrella Pole Railing Clamp

Built a small deck and didn't want to take up deck area with a large (and heavy) base for a large sun umbrella. Built clamp to mount the umbrella pole to the outside of a corner railing post, keeping it off the deck freeing space up on the deck.

I'm using 3 sets of clamps to attach umbrella pole to the railing post. It clamps very solidly with 2 sets of clamps.