NUMBER 3 SHOP Unit Availability: 8’3” units with trimbacks developing  available in 4/4, 5/4, & 8/4. 4/4 12’ available.  NUMBER 3 SHOP grade is an economy grade that is used in upholstered furniture and sofa manufacturing.  Boards are selected for shorter structurally sound cuttings maximizing raw materials value. Well suited for finger jointed panels and specialty items Widths: 3 inch (76.20 mm) minimum. Lengths: 72 inch (182.88 cm)  minimum. Minimum Size Cuttings: 3 inches (76.20 mm) by 24 inches (60.96 cm) structurally sound cutting as described in "Sound Cutting". 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 33.33 percent structurally sound cuttings or better.