On Saturday, November 5, 2016 at 11:06:10 AM UTC-4, Pat wrote:
On Sat, 5 Nov 2016 07:39:22 -0700 (PDT),
wrote:

Hey, I'm a Canadian, we don't abuse each other for making a typing error. I got my measuring tape out and the deck is 10 ft 3 inches wide and 14 ft 5 inches long.

One side (the side where the hot tub will be) is attached to the outside wall of the house.

The joists underneath are 21 inches apart. The other side is secured by 3 4x4 posts evenly spaced. Their website says it weighs 1972 lbs.

Not sure what being Canadian has to do with it. I haven't seen any of
your earlier post or replies. Regarding the weight of the tub, 1972
lbs. is either the weight of a very small hot tub -or- the empty
weight of a very large hot tub.

Seems like a reasonable weight for a typical home hot tub with water
that's going on a deck to me. A gallon of water is 8 lbs. Empty
it probably weighs a couple hundred pounds, leaving enough for around
200 gallons of water.

Not enough info on the rest, ie joist size, what's supporting the joists
on either end, etc.