Wood Touching Concrete 1

[Tom Fairbourn]

We are converting a 60 year old medical building into apartments in Salt Lake City. The floor of the existing structure are I beams with concrete floors. I have figured pressure treated for all of the bottom plates at each level but is it necessary to install pressure treated to the top plate and kickers (bottom of the concrete floor above). There is nothing in the code that indicates P.T. is required for this scenario, but it also doesn't have this scenario in the IBC.

I cant imagine the concrete having any moisture content being as old as it is, also the levels will all be heat/cool controlled so there should be no concern of condensation.

 

[JAE]

I've only used PT wood on concrete that is directly exposed to soil or moisture.

Not sure why you'd need it for concrete on an elevated structural slab.

 

[Celt83]

It sounds like you are inserting full height wood walls between two concrete floors, be careful with this if the wood is installed tight to the underside of the slab above then vertical movement of the floors will not be isolated.

For infill walls we would typically see cold-formed metal framing with continuous vertical deflection tracks at the top.

 

[ctopher]

You get some very cold and hot temps in Salt Lake. It wouldn't hurt to stay with PT just in case moisture creeps up into the areas.

Chris, CSWP
SolidWorks
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