4 x 16 x 20, Douglas Fir, No. 1 & Better, Pressure Treated, Surfaced on 4 Sides. 4X16X20 Df #1 & Btr S4S Trt. Douglas Fir, Pressure Treated, No. 1 & Better grade lumber. Often described as a 20 ft, 4 x 16 (nominal sizing), this product typically measures 3-1/2 in thick by 15-1/4 in wide. Appearance notes: Surfaced on 4 Sides.

Item Features

• Douglas Fir is the major species produced in the West, with more volume shipped than any other species and its sterling performance history is recognized the world over
• No. 1 & Better grade lumber consists of many pieces of fine appearance suitable for exposed uses; the strength qualities of this grade make it desirable for use in almost all classes of heavy construction
• Pressure-treated wood is wood that has been treated with chemicals that protect the wood from rot and insects
• The board has been surfaced smooth on all 4 sides