#3 SHOP (#3 SH) grade is an economy grade that is used in upholstered furniture and sofa manufacturing.

#3 Shop Maple grade utilizes both clear two-face cuttings and sound cuttings in the board to make up the over-all minimum yield.

Cuttings: 3 inch (76.2 mm) wide by 24 inch (60 cm) and longer with some 2 inch wide (50.8 mm) finger joints in the 12 inch (30 cm) to 20 inch (50 cm) range.

Minimum Length: 6' longer

Minimum Finger Joint: 12 inch (30 cm) to 20 inch (50 cm).

Minimum Width: 3-3/8 inch (85.7 mm)

Overall Minimum Yield: 33-1/3 percent.