10/4 NUMBER 1 Unit Availability: 8’3” units with trimbacks developing available in 4/4, 5/4, & 8/4. 4/4 12’ available.  10/4 NUMBER 1 grade is a high-grade product sorted for a combination of clear one face (C1F) and clear two face (C2F) Cuttings. Sound back rules apply to the (C1F) cuttings. Widths: 4.5 inches (114.30 mm) minimum , admitting 5 percent (by volume) narrows. Lengths: 72 inch (182.88 cm) minimum. Minimum Size Cuttings: 3 inches (76.20 mm) by 36 inches (91.44 cm)  or 4 inches (101.60 mm)  by 24 inches (60.96 cm).  No Limit to the number of cuttings allowed. Grade Notes: This grade admits all boards of 24 inches (60.96 cm) and over surface measure yielding not less than 66.66 percent clear one face cuttings or better. Boards are graded from the poorer face. SIDE BEND is limited to 1 inch (25.40 mm). PIN KNOTS are not considered defect.ct.