[JesseK]

Originally Posted by falconmaster

http://www.creativepultrusions.com/

Pultruded Fibergalss

1/5 the wt of steel/ 1/3 of alluminum for same strength!
the best stuff!

What's the cost compared to 6061 Aluminum? I'm thinking along the lines of 1" square tubing that's 1/16th thick for aluminum (since we know it's strong enough) vs. 1" square tubing that's 1/8" thick for the fiberglass.

Also, what do you use to reliably "weld" the components together? Also, being that you're from a NURC team, how well does this stuff hold up under water?