I have a hot tub on my deck. I'm ready to fill it but now wondering about the weight on it. The deck is 10' wide with 2x8 joists on 16"centers. The tub is 7' x 7'. When filled with water and people it will weigh about 6000lbs.
I know it's not strong enough. I was thinking about sandwiching each joist with two 2x8s then installing a header under each end. I would like to keep it open underneath.