JCN,
Beams came in at $1,310.00 each (those were the 40')
It depends on the end fixity of the beam in a solid setting, and how solid that foundation is.
If you used I beams, I think you could bore in and pour 4 concrete piers, use 24' beams, with 9' anchored on the piers and 15' hanging over the water.
I think that would be reasonable, but there is a lot of number crunching involved.
I really like the idea, but like I said, It's probably not the best candidate project on a DIY level, if you are not familiar with the engineering involved and want to make it safe for everyone you love.
Thank you very much for the info, gives me an incite to that approach.
