Heavy-duty pressure-treated lumber for posts, beams, and outdoor construction. Built to withstand NYC conditions.

The 6x6x12 pressure treated lumber from Arch Building Supply is ideal for structural posts, large deck supports, and exterior framing requiring maximum strength and moisture resistance. Trusted by contractors and homeowners throughout NYC.

Specifications

• Nominal Size: 6 in. x 6 in. x 12 ft

• Actual Size: 5.5 in. x 5.5 in x 144 in

• Material: Southern Yellow Pine

• Treatment: Pressure treated, exterior / ground-contact rated

Common Uses

• Deck posts & beams

• Fence and gate posts

• Pergola and gazebo supports

• Exterior structural framing

• Residential & light commercial construction

• Nominal vs. Actual Size: Lumber is sold by nominal size; actual dimensions are slightly smaller (a 2 in. x 8 in. board measures approx. 1.5 in. x 7.25 in.).
• Grade: Construction / Framing Grade
• Moisture Content: Kiln-dried (KD) to minimize warping, twisting, and shrinkage
• Finish: S4S — surfaced on all four sides for easy handling, cutting, and fastening
• Weight: Varies by species, length, and moisture content

Pressure treated stock is rated for exterior use, including decks, fences, and ground-contact applications.

• Local pickup options available
• Delivery available depending on product and location
• Lead times vary based on availability and order size

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