Deck Design: Is UC3B (Above Ground) preservative treated lumber suitable for joists and beams?

[FrankWoeste]

Based on the code referenced AWPA U1-2016 Standard, TABLE 2-1, Footnote 1, the answer is no.
Footnote 1: Joists and beams shall be treated to requirements for UC4A when they are difficult to maintain, repair or replace and are critical to the performance and safety of the entire system/construction.
A free download of the latest version of AWPA U1 is available at this link:

https://awpa.com/images/standards/U1excerpt.pdf

 

[lexpatrie]

Like Virginia Tech Frank Woeste? 2x2 ledger testing Frank Woeste? Strong Post-Rail connections Frank Woeste? The actual Frank Woeste? Deck lateral loads Frank Woeste? Twisting garage headers Building Safety Journal Frank Woeste?

Is there any chance you know of any documentation or calculations for balloon framed studs?

 

[Eng16080]

If this is the VT Frank Woeste, thank you for your exceptional work! I recently learned a lot from your research on deck railing posts.

Joists and beams shall be treated to requirements for UC4A when they are difficult to maintain, repair or replace and are critical to the performance and safety of the entire system/construction.

My question would be: when is this not the case? I've rebuilt old decks and never once came across a beam or joist that wasn't difficult to replace or wasn't critical to the overall system!

 

[FrankWoeste]

Thank you Eng16080 for the kind and generous comment on our work. You pose a good question.