Concrete slabs will wick moisture between the underlying dirt base and the wood members sitting on top of the slab.
Pressure treated wood basement floor.
Pressure treated pt lumber is made for damp areas where there s moisture and direct contact to concrete or earth.
Such as hot dipped galvanized or stainless steel fasteners.
The only purpose of the preservative is to prevent rot and insect infestation.
Sticker will id engineered lumber for firefighters.
Wood foundation details similar projects.
Actually the logic of using pressure treated wood in a finished basement is flawed and i find it amazing that so many contractors use it.
Pressure preservative treated wood basement floors and floors on ground shall be designed to withstand axial forces and bending moments resulting from lateral soil pressures at the base of the exterior walls and floor live and dead loads floor framing shall be designed to meet joist deflection requirements in accordance with section r301.
There s more detail about this below.
Keep in mind pressure treated is not only a preservative it is also a poison to prevent termites.
If untreated wood is used for the bottom board the high moisture level will promote rapid decay.
Wood foundations require foundation grade pressure treated wood studs sized for soil pressure the proper fasteners solid gravel footings damp proofing and good drainage.
Pressure treated used in walls.
Make sure to use the proper coated anchors for pressure treated lumber.