A few more...
Calypso, you are absolutely correct - I designed/built the deck myself to withstand 120 lbs/sq ft. The beams running under the tub are 2 X 10's supported by 6 X 6's. 2 X 8 Joists spaced 12" OC w/ Trex composite decking laid out at 45 degrees. "Overkill" seems to be the standard response from our guests...
Since I completed the electric to the disconnect prior to delivery, I was able to finish running wire from GFCI disconnect to tub by the time the tub was full. She took just over 4 hours to warm to 99 degrees from 64 degree tab. Been enjoying ever since! 8-)
Regards,
Kevin