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S4S Dimensional Pressure Treated Lumber

For a wide selection of surfaced (S4S) lumber and timbers treated with ACQ, the Chromium- and Arsenic-free alternative to traditional wood treatment, call McArthur Lumber and Post. 

We offer a full range of sizes in grades from #3 to Dense Select Structural, and treatment levels for a variety of applications. 

Our radius-edge decking has an integral water repellant for years of maintenance-free service, and all of our dimensional lumber is stickered to enhance post-treatment drying and maintain dimensional stability.