I am building a foot bridge over a creek. I don't want to try and sink
footers/posts in the creek itself, I am wondering how long a 2x12 can span.
I am able to find 26 foot treated 2x12's locally. If I sandwiched two of them
together on each side of a say a 3 foot wide foot bridge would that work? The
ends of the bridge will be treated 6x6 posts (so 4 total). The span between
posts will almost be the full 26 feet. My question is:

1. is this safe?
2. is the perfect?
3. is this overkill?

Thanks
David

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