Replies

1. 
   dIrishInMe | May 30, 2005 02:20pm | #1

   To span 22' to 28' you are going to have to use the largest I-joists you can get your hands on, and even then it is questionable at best, even for a temperorary floor.  If it would work, you are looking at a >1200 sq foot floor system and several thousand dollars...
    

   Matt
1. 
   jagwah | May 30, 2005 05:06pm | #4

   Remove the lid and install foam flotation blocks. Build shy of the sides and place foam edging to prevent bump damage to coping. Then tether edges to yard and hide tethers with plants and flowers.

   Deck will be a little soft under foot like a good secured boat dock. Your using the water for load bearing.

   Just a thought

   Personal note I am just a carpenter who has trouble saying no to a good paycheck.

   Check on a rider to your insurance and then get them and their guest to sign a release.

   Good Luck 8) 

2. 
   Jerry18 | May 30, 2005 02:28pm | #2

   Whatever you do, have it engineered for it's purpose (people dancing).
   This accident could have been worse.

   http://scholieren.nrc.nl/extra/engels/2001/482.shtml

   Jerry

3. 
   MAsprayfoam | May 30, 2005 04:54pm | #3

   I agree with the other 2 posts.

   I think I would construct that cover with a 4' high fence circling the pool.
   Stu

4. 
   CloudHidden | May 30, 2005 07:25pm | #5

   Turn a problem into an advantage:

   "Nowadays, your event can take place anywhere from a mountaintop to a rocky coastline, thanks to subflooring options. “We once built a dance-floor balcony that extended over a lake,” says Dennis Coppi, of HDO Productions, which has offices in Chicago, Washington, D.C., and San Francisco. Another way to walk on water is with a clear dance floor that fits over an in-ground pool. “You can light it from below and put bubble machines in the water for a really dramatic effect,” he says."

   http://www.brides.com/reception/article/?wr_rentals0704.html

   Bubble machines and a clear dance floor would be AWESOME. Probably costly, but so would be creating a suitable wood structure.

5. 
   quicksilver | May 30, 2005 10:53pm | #6

   Can you drain the pool and split the span, You could then build three different header systems and run 2X10 or 2x12 just higher than the pool apron, preferably 1 1/2 '' above the pool deck. Then you could lay down 2x material flat on the deck to act as plywood nailers. Your dance floor would be 2 1/4'' 's above the pool deck. I don't know how expensive it is to drain the pool, but the I joist senerio would not be cheap. I'm working on a building with a 22' span and we used 16'' 2 1'4 i joists @ 1.85$ / ft./ not cheap either.