Pressure treated lumber is chemically treated to resist rotting, insects, and fungus.
(2.5 in. x 11.25 in.)
In Ground or Fresh Water Pressure treated. Douglas Fir is much stronger and less likely to warp than the HemFir treated you commonly see.
$3.29LF by the unit
Drilling, sawing, sanding or machining wood products generates wood dust and other substances known to the State of California to cause cancer Avoid inhaling dust generated from wood products or use a dust mask or other safeguards to avoid inhaling dust generated from wood products. Wood products emit chemicals known to the State of California to cause birth defects or other reproductive harm. California Health and Safety Code Section 25249.6