Just a general questions: Since the new treated wood has such controversy with corrosion - Simpson has their own hot-dipped galvanized nails- I bought the simpson's as they actually look like their better than the regular Lowes brand and don't really cost much more.
I was wondering- since I'm building the 6x12 24ft long beam from treated lumber, even if it is high and dry would a regular nail corrode? Is it the chemicals in the wood, or is it the chemicals + moisture that causes the corrosion.
Note-Redoverfarm- I was out at Appalachian String Band Festival- fiddling, your probably back in Marlington, sorry I missed you.
since I am a big fan of glue I always apply glue with a paint roller to beam laminations and screw with regular galvanized screws.
I intend for the glue to be the eternal bond.
I think there is a place for more glue joints in building.
Anybody else like glue???????????????
They say it's the chemical ( / really dissimilar metals), the copper in the treatment and any other metal it touches. So it not really a chemical corrosion, but a dissimilar metals issue.
The galvanization helps with that.
I solving or reducing one problem the arsenic leaching , kids eating it issue they've created one where metal will fail and people will get killed or injured by collapsings decks and other structures failing due to corroded hangers and fasteners. :o
So do not mix and match , thats for how you dress , not how you build ;)
d* You got it before me, PEG but I wasted all my time typing so I'm posting anyway - good explanation though [cool]
Some use glue -liquid nails on brace panels and floors to increase strength and prevent squeaking.
The problem with the connectors, nails and ACQ or possibly other treated wood is electrolysis. The chemicals - even if barely damp will set up a battery that works just like reverse chrome plating a bumper. The copper in the wood will draw the iron in the fastener toward it as small electrical currents set themselves up in the battery created by the copper, salt electrolyte and the iron. Soon there is treated wood and a hole full of rust.
The extra heavy galvanizing is sacrificial and protect the iron along with corroding slower. Nobody says the process is stopped though - its a law of nature.
Thanks. I chose treated lumber for the beams and also for the 2x10 floor joists, simply for added protection because of the crawl space. (I already bought the lumber). My nail gun doesn't have galvanized nails. I guess I can break out the old hammer and get some galvanized nails. Once the floors joists are in, and then the subfloor installed, there's not going to be much to do when it all falls to the ground in a few years. I guess I need galvanized nails for the 3/4 plywood subfloor to nail to the floor joists. Maybe I'm to worried on this first big project 14x24 building. I know last year I made some really heavy stairs 7 steps from the patio to the ground. I took them apart to move it this year, and found that the bolts (galvanized) were really rusted- not on the outside, but where the wood touched it.
You might add liquid nails - glue under the sheets and the heavy plated rough hot dipped galvanized I think PEG mentioned are best.
If you want power to drive these then the palm nailer works great on individual nails. Economy model - I think about $40 at harbor Freight ...I have a Senco at around $80
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93496
John I usually use polyethelyne(sp?) glue for the subfloor. Some manufactures recommend it. As for the galvanized nail I get the Bostic air nailer galvanized nails. They state it is for PT lumber. Although they are not hot dipped but electro plated. But they say it is OK to use. Ring shanked for the flooring 12pd galvanized. As for the beams I used 16pd galvanized for stacking them with Ply between and glue. It seems that everything I do is "glue and screw" A little more labor intensive but it's how I was tought.
Yeah on the Festival. I came back on Sunday. Where was that at?
Clifftop at Fayetteville (all old-time). I'll try to find some galvanized nails for the nailer. I picked up a palm nailer at Harbor Freight . It only lasted for 5 nails, then broke. I'll bring it back and go and get a Ridgid. I don't know why I keep buying their junk.
Go HERE (http://countryplans.com/smf/index.php?topic=5008.new#new) for some info.....