You'll get helpful responses from volunteer Pros etal. at the sister site.
https://www.diychatroom.com/

 

Menards will get you. 60 CCA, or request it from your lumber yard.

 

Flashing tape on weathered edges would prolong life

 

Light guage steel.

 

Smart design above all else for framing longevity.
Along with best flashing practices. But avoid direct wood/wood contacts. Give proper drainage gaps where needed, maintain those gaps and don’t let it become leaf and tree debris pockets 24/7

what part of the country is not allowing framing to make 25 years?

cold galvi paint the hardware before the rust sets it. Z-max is minimal and where’s away just like anything.

make lead paint. Ssshhhh.

 

But avoid direct wood/wood contacts.

We're gonna need a little more insight on this one.

 

Put a gasket in between.

 

Like a doubled rim. Flash the top but also flash the side in between.

 

I won't do a "go over" with old p.t. Why put 15k worth of materials on 2k worth of old framing? Coat all cuts with copper green and joist tape will extend life.

 

So you wrap each piece of a built up beam? Ledger, blocking, posts ect?

 

I don’t always.
but have. Most of my deck building was for someone else.
Too often I’ve seen what you just said. 15k in synthetic decking over tired old framing trying to save 2k.
Just silly. But, if wanting longevity as long as possible, there is a science to avoiding wood/wood contacts as much as possible.
Just like for years it was “ get it right, get it tight”
Now it’s all about rain screens, air flow, even on post base trim wrappings.
but what’s not discussed is keeping those areas from Becoming jam packed with organic debris and still harboring moisture for prolonged periods of time.

even just painting every edge and yes, adding copper green to every cut will increase life span.
but if you frame and build it all, then have Joe blow paint on the undercarriage only hitting what’s visible, that in time could trap things within the wood and allow harm that’s harder to notice go about over time.
Metal is great, long as not to avoid rust. Longest lasting is stone, long as done right it can be earthquake proof as needed

 

Chestnut, white oak, Osage orange, ..

 

To mention the obvious, you aren't just slapping synthetic requiring 12" framing onto 16" on center.

 

How about cedar decking? How long does that last in the real world? Anyone try it?

 

What real world is that? Nobody here knows where you live or what trade you're in. The real world you want to do this deck in is wherever you are. Not all materials are suitable for every climate.

Cedar used to be used almost exclusively around here 20-30 years ago, except for tract homes and customers wanting an economical deck. It would easily last a couple decades or more with regular maintenance. Now it's hard to get cedar without a ridiculous amount of knots, plus it's getting so costly (about 2.25/lf for 5/4x6) that composite is more attractive with the lower maintenance aspect.

 

Tape is mostly useful to isolate water absorption to the lower members of a deck. Laminated lumber areas will trap water and encourage rot. .15 ACQ is garbage in Michigan climates and will rot at trapped water locations above grade in under 10 years.

Therefore, joist tape topside is only going to protect the framing. Wood decking is toast unless other protections provided/ applied.

Protect water intrusion to beam to post connections, joist to ledger/beam, laminated beams, 2x tread to 2x risers, etc.

Otherwise, as I mentioned, you can still get .60 CCA lumber. Or, you can also request .23 MCA treated lumber which they rate as comparable to .60 CCA. I doubt it is, but maybe time will tell.

Product Literature & Warranty Information - Biewer Lumber

Product Literature & Warranty Information | View literature & warranty information for Select Cut® , Biewer FRTW, ColorPRO Fencing, Select Cut® Premium Fencing

www.biewerlumber.com

Koppers Performance Chemicals Treated Wood Products | USA

www.koppersperformancechemicals.com

 

What was 1981 CCA number? What value CCA? I have a wooden path, on the ground, in the mud, for 44 years now, solid as a rock. Wish i could buy that.

 

You'll need to find a tag, or stamped rating to know. Pressure treatment varies per pressure amount... and the treatment chemical type that are..pressured, or forced into the wood.

 

Thks for all the help To all. Learning.

 

Snowcountry here higher end residential is gerds with trailer decking and offset hardware under deckbords. Think snow removal machiery

 

If there are problems with PT framing then the work was not done properly. There needs to be ventilation under the decking and often I see where someone thinks it looks better with the sides covered.

Redwood or cedar decking today is nothing like what was available 30 years ago and this is why I replaced my own redwood decks with ipe and stone pavers. Ipe will last 3-5 times as long as any other wood. The stone pavers will outlast me and my house.

Silca Systems and other companies make plastic grids that attach to the joists and provide a surface for pavers or tiles. They provide tables to make it easy to know how much of a load will need to be supported and up size the joists and footings.

I pressure wash the stone decking once a year and that is all that is needed.

I use only hot dipped bolts and nuts for the bracing so they last as long as the PT joists.

 

Redwood…gotta buy extra for when the first one splits in half while you’re just carrying it.

poor babies being slaughtered before they get the chance to become solid, viable pieces.

 

Northern NY where a railing top made of a treated 2x6 lasts about 10-12 years until it is sponge.

 

Have you looked into Owens Corning Structural Framing. Very expensive, but will last forever.

 

Interesting. I’ll remember the name.
wonder how long some things have been built with it now.

 

I built a cart for my tractor in 1985 out of steel angle and CCA sides and deck. It has sat outside for 40 years in Western PA weather and is still solid.

 

I use ground contact pressure treated fir and design the deck so that there is zero ground contact and plenty of ventilation under the deck.