Exterior wood to steel: corrosion issues
So I’ve built(well, it isn’t done yet) a bridge to my front door over the creek/swale between the house and the road. Its a person bridge, welded red-iron frame with shop-prime. Hell for stout, probably 1/840 for deflection under passing elephant herds.
Now I want to lay some pt sleepers on the steel to fasten a trex decking over the top, as well as bolt some 2×10 pt bands on the side to accept railing posts. The problem is I really don’t want the AQC wood to eat my nice steel bridge.
I’m considering putting a piece of Vicor over the top between the steel and the sleepers, and maybe holding the bands off the sides by inserting washers between the steel and the wood to form a stand-off. I don’t really like the standoff idea, though, because I can see it calling for way more fasteners to achieve the stiffness you’d get by sandwiching the wood directly to the steel. And, while poking a bunch of little holes in the C channel’s web isn’t an issue structurally, it sounds like a long day behind the drill.
Anybody have suggestions?
Replies
Why not go with redwood instead of ACQ? I've never used it, but how about Azek? A lot of guys here swear by it.
View Image "...craftsmanship is first & foremost an expression of the human spirit." - P. Korn
bakersfieldremodel.com
Redwood's an option, cedar's a little more common in my neck of the woods. The tannins would make some nasty black marks after a while, but it'd probably last as long as it'd need to. Having replaced a deck or two, I've seen more rotted cedar and redwood than PT, especially in places that trap water.DCG Your Neighbor's Contractor LLC
"A wrongdoer is often a man who has left something undone, not always one who has done something."--Marcus Aurelius
And why does the old signature pop up on occasion??? Haven't owned that company in years..
well, yeah, but the largest culprit seems to be moisture-wicking endgrain, and I would think you'd be in a position to minimize that problem with a little extra effort and a few gallons of wood preservative, before attaching the sleepers.View Image "...craftsmanship is first & foremost an expression of the human spirit." - P. Korn
bakersfieldremodel.com
In Florida one can still get CCA treated lumber to be used for saltwater contact. Perhaps you can get it in Seattle, although you guys tend to be a little "greener".