Standard grade southern yellow pine with radius edge edges. Severe Weather Above Ground pressure treated exterior wood is protected with Ecolife; a stabilizing formal, that repels water, keeps boards, straighter, and looking better longer. Ecolife (EL2) provides built-in water repellency that lasts for up to 3 years and reduces surface cracking and checking by up to 50% compared to ordinary treated wood. Treatment meets American Wood Protection Association (AWPA) standards and is building code compliant (IRC and IBC). For optimal performance of paint and stain coatings, allow wood to dry after installation, and apply a UV protective finish to enhance long-term beauty. Install the deck boards tightly together, and pre-drill holes at the ends of boards to minimize splitting. Use building code approved fasteners and hardware. Hot-dipped galvanized or stainless-steel is recommended. Economical choice for decks, gazebos and above ground exterior projects.