Hot Tub Deck construction question

[dennisoates]

Do I need to deck this framework or can I sit my  Jacuzzi on the beams, its 7x7 and will weigh 4500 loaded with water and people. see pic below. thanks


http://www.flickr.com/x/t/0094009/photos/rainbowtawas/9559930358/

[mjb]

Dennis, while the timbers certainly appear to be
quite stout and would probably support the overall
weight of the spa, the spacing of these timbers may
not correspond with where some of the load points
are in the hot tub and could create some sagging
and potential negative structural issues.

[Tman122]

That and what does the structure of the deck under the timbers consist of?

[dennisoates]

4x4 with 5/4 bds
on the ground .been there 10 years with old hot tub ,I just want to raise it 17 inches