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Old 07-30-2007, 06:24 PM   #16
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Lifespan of galvanized nails in PT lumber


At this point, it would be cheaper buying all new lumber, than to spring for stainless fasteners and hangers.
I'd be out about $90-100 in lumber, but I'd rather do it correctly from the start. I shouldn't have let the BORG lumber guy talk me into going with PT.

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Old 07-30-2007, 06:42 PM   #17
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Lifespan of galvanized nails in PT lumber


Well... guess I've learned something new also. Can't say that I've had enough history with ACQ to witness any problems. These articles do point out that there is varying quality in galvanized nails as well as stainless.

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Most decks are built to last 15 to 20 years, which is easily within the life of a properly maintained galvanized fastener. But for high-end work, and especially for projects in more corrosive environments such as near the ocean, stainless steel is the way to go.
http://nadra.org/industry_news/acqarticle.html

http://www.lbmjournal.com/articles.pl?id=131
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Old 07-31-2007, 05:32 PM   #18
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Lifespan of galvanized nails in PT lumber


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Originally Posted by fhivinylwindows View Post
Take a few extra ones and nail them into some scrape 4x4's and pull one out every 6 months and see what the difference is. I have some pictures of 1/2 lag bolts that are eaten away to the size of a pencil---I will scan and post them when I find them again.
And I bet it didn't take them long to get to that size. Electrogalvanized is just a waste of money. I have seen hot dipped last a while away of the beach.
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Old 07-31-2007, 05:47 PM   #19
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Lifespan of galvanized nails in PT lumber


So why did they go to this new PT if it is so corrosive. Just curios.
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Old 07-31-2007, 06:54 PM   #20
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Lifespan of galvanized nails in PT lumber


It is primarily used for it's "Low Toxicity":

ACQ information:

http://www.insidewoodworking.com/lumber/acqlumber.html

http://en.wikipedia.org/wiki/Timber_treatment
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Old 07-31-2007, 07:13 PM   #21
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Lifespan of galvanized nails in PT lumber


That is what I kind of figured. What are they going to do when decks and other structures start falling down because of corrosion issues. It sounds like a job was half done. I am not against safer materials. However how in the heck can they allow people to use fasteners that fail at the rate you guys are talking about. What about all the j bolts used in houses. They are not going to last long. With all the new codes for tying the house down this sounds crazy.
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Old 07-31-2007, 07:48 PM   #22
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Lifespan of galvanized nails in PT lumber


It took a long time to convince myself and maybe I'm overreacting but I decided to throw away all my work and rebuy all the materials using standard lumber... I love throwing money away; maybe I can use the 4x4s for some raised flower beds or something. I pulled out one of the lag screws and it looked like there was already the beginning of corrosion on the back side of the washer (it turned black). I'm glad this learning experience happened on a small project.
I thought I was doing the right thing using PT because there were some rot on the rafter tails and the posts were also rotted out. Although my application won't see the same exterior conditions as a deck it still will be prone to some moisture. I think I will feel better knowing that the fasteners will last as long as the original. If the ss nails and hangers were more readily available I would have considered going that route, but being a 9-5 DIYer I don't have the opportunity to easily shop at the local building supply store.
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Old 07-31-2007, 08:32 PM   #23
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Lifespan of galvanized nails in PT lumber


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What is the lifespan of galvanized nails in pressure treated lumber?
I'm rebuilding my portico entry, largely using PT stock (rafters, posts, nailing 2-2x stock together, etc). Should I be concerned with the lifespan of the fasteners?
I don't think there is a long enough history with the new PT to have much info based on real field data. All the projections and marketing bragging is really based on laboritory testing in which they try to accelerate the aging process. IMO stainless is the cream of the crop for lifespan, but they are a little harder to work with as mentioned, and a whole lot more expensive. I believe you will get good service from a quality double dipped molten zinc product like the Maze Storm Gaurd or similiar, just stay away from the cheap stuff. If it is smooth and shiny, it is junk.
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Old 08-01-2007, 03:55 PM   #24
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Lifespan of galvanized nails in PT lumber


My local lumberyard had the Simpson rep in today. I talked to him about the impact of ACQ on galvanized fasteners. He said there are so many variables that the affect the lifespan of galvanized fasteners that it's impossible to predict. In one case, he's seen some hangers show uneven premature wear on a double 2x8 hanger. One side was fine the other had notable corrosion. That was only after 3 years of use. The piece to piece variations of the lumber treatment itself were to reason for the uneven corrosion.
He was however pushing the stainless hangers for PT stock, but said the ZMax galvanized were good enough for most locations in the US. Here in the Northeast we have acid rain which further exacerbates the corrosion problem. He was on the fence of which hanger material to use (ZMax galvanized or stainless) for most outdoor projects. Simpson claims the lifespan of most decks is 15 years. My mom's deck is probably 25-30yrs old now. It doesn't look great but it's still in use and safe. I guess you CAN'T build them like you used to.
FYI, I checked the price difference for a single 2x6 hanger; Galvanized $0.89, Stainless - $6.00.
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Old 08-02-2007, 07:57 PM   #25
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Lifespan of galvanized nails in PT lumber


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Originally Posted by fhivinylwindows View Post
I have some pictures of 1/2 lag bolts that are eaten away to the size of a pencil---I will scan and post them when I find them again.
If you do come across those pics, I'd like to see them.

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