Price List for Lumber- black walnut wood price per board foot ,Lumber Price List ~Band sawn walnut boards~ +All prices are for random width, random length, flat sawn, unplaned lumber. ... Figure the wood will weigh 3 to 5# per board foot...this means a 100 bf order can weigh 500 lbs.! Shipping can be billed, paid directly ...American Black Walnut Solid Plank Prices | Country PlankAmerican Black Walnut Solid Plank Prices. Grades & Specs | Solid Plank Prices | Engineered Plank Prices. All pricing is per square foot, excluding freight (please add 10% to your measurements for cutting & fitting) Clear Grade Widths. Unfinished Length 1'-8'. Unfinished Length 2'-10'. Unfinished Length 3'-10'. Unfinished Length 6'-12'.