Along with what was written in the last post (see –Hybrid-Composite Beams [Boardwalk-Rebuild Idea #3]), here’s more information on a material called TimberSil Decking, which seems to be a perfect replacement for our wooden boards. After all, IF THERE ARE NO BOARDS, WE CAN NO LONGER CALL IT A BOARDWALK!!!!!!
Featured on THis Old House, TimberSil is chemical-free and exempt from EPA regulation. Is is 50% stronger than chemically treated lumber, is Class A Fire Rated, and has a 40 year warranty.
Videos showing of much stronger it is than typical treated lumber can be seen here on the lower left. If you can get your city interested we can get enough material for a sample section to you guys.
Here is the PDF with all the information on TimberSil Decking: http://www.docspal.com/viewer?id=vloiqftb-2670160