large size ground protection boards 3×6 direct sale 2 in. x 6 in. x 16 ft. #2 Prime Ground ntact Southern Pine Pressure-Treated Lumber Pressure-Treated Southern Yellow Pine meets Pressure-Treated Southern Yellow Pine meets the highest grading standards for strength and appearance. industrial plastic road mat 6’X3′ for foundation works 5% Borated Polyethylene Board.