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Pre treated sill plate
- Thread starter Dan
- Start date
mjesse
Registered User
Re: Pre treated sill plate
First off, welcome to the board.
Are you asking about uses for pressure treated lumber, like green or ground contact wood?
It can be used just about anywhere standard lumber can be used. There are no "exclusions" for residential construction as long as it meets the required ratings.
Outdoor deck framing, concrete contact areas, sometimes tub/shower areas, etc. are typical. Other interior and non-contact areas it's not required, and usually too costly versus standard lumber.
Is there a more specific question you have like; "my contractor used treated lumber for my kitchen studs, is it okay?"
We're here to help!
mj
First off, welcome to the board.
Are you asking about uses for pressure treated lumber, like green or ground contact wood?
It can be used just about anywhere standard lumber can be used. There are no "exclusions" for residential construction as long as it meets the required ratings.
Outdoor deck framing, concrete contact areas, sometimes tub/shower areas, etc. are typical. Other interior and non-contact areas it's not required, and usually too costly versus standard lumber.
Is there a more specific question you have like; "my contractor used treated lumber for my kitchen studs, is it okay?"
We're here to help!
mj
Re: Pre treated sill plate
Thanks mj for the reply
What I have is girder truss 2-ply with 3 bearing points. The 2 end points rest on exterior bearing walls with (2) 2 x 4's No. 1 under the top plates. The middle bearing point rest on a bearing wall with (2) 2 x 4's under top plates, but they are pre-treated 2 x 4's. The framing plan does not show any support at these locations. Don't know if the plan checker missed the load points during plan check. Plan checker says these (2) 2 x 4's are ok for this application. I seem to remember a report by a wood assocation saying that pre-treated wood is no better than a utility stud. Just trying to find that info or something similar. Definitely will put plan checkers initals on my write up.
Thank
Dan
Thanks mj for the reply
What I have is girder truss 2-ply with 3 bearing points. The 2 end points rest on exterior bearing walls with (2) 2 x 4's No. 1 under the top plates. The middle bearing point rest on a bearing wall with (2) 2 x 4's under top plates, but they are pre-treated 2 x 4's. The framing plan does not show any support at these locations. Don't know if the plan checker missed the load points during plan check. Plan checker says these (2) 2 x 4's are ok for this application. I seem to remember a report by a wood assocation saying that pre-treated wood is no better than a utility stud. Just trying to find that info or something similar. Definitely will put plan checkers initals on my write up.
Thank
Dan
Re: Pre treated sill plate
Here's some good information on treated wood.
Treated Wood and the 2006 IRC
And some more info about teated wood and the use catagory. There is a stamp on the wood somewhere with this info on it.
Treated Lumber Use Codes
Use Category Brief Description
UC1 Interior Dry
UC2 Interior Damp
UC3A Exterior Above Ground, Coated with Rapid Water Runoff
UC3B Exterior Above Ground, Uncoated or Poor Water Runoff
UC4A Ground Contact, General Use
UC4B Ground Contact, Heavy Duty
UC4C Ground Contact, Extreme Duty
UCSA Marine Use, Northern Waters (Salt or Brackish Water)
UCSB Marine Use, Central Waters (Salt or Brackish Water)
UCSC Marine Use, Southern Waters (Salt or Brackish Water)
UCFA Interior Above Ground Fire Protection
UCFB Exterior Above Ground Fire Protection
Hope this helps!
Here's some good information on treated wood.
Treated Wood and the 2006 IRC
And some more info about teated wood and the use catagory. There is a stamp on the wood somewhere with this info on it.
Treated Lumber Use Codes
Use Category Brief Description
UC1 Interior Dry
UC2 Interior Damp
UC3A Exterior Above Ground, Coated with Rapid Water Runoff
UC3B Exterior Above Ground, Uncoated or Poor Water Runoff
UC4A Ground Contact, General Use
UC4B Ground Contact, Heavy Duty
UC4C Ground Contact, Extreme Duty
UCSA Marine Use, Northern Waters (Salt or Brackish Water)
UCSB Marine Use, Central Waters (Salt or Brackish Water)
UCSC Marine Use, Southern Waters (Salt or Brackish Water)
UCFA Interior Above Ground Fire Protection
UCFB Exterior Above Ground Fire Protection
Hope this helps!
Re: Pre treated sill plate
This one may be more what you are looking for.
Changes in Pressure-Treated Wood for Residential Construction
This one may be more what you are looking for.
Changes in Pressure-Treated Wood for Residential Construction