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Hardwood Lumber - Dimensions

Sizing of hardwood lumber.

Dimensional lumber made from hardwood varies from the sizes used for softwood. Hardwood lumber dimensional sizes are indicated below:

Hardwood Lumber - Dimensions
Rough SizeNominal SizeActual Dimension (in)
(Inches)(Fraction In)
("quarter")
S1S1)S2S2)
3/8 3/16 (4.8 mm)
1/2   3/8 (9.5 mm) 5/16 (7.9 mm)
5/8   1/2 (13 mm) 7/16 (11 mm)
3/4   5/8 (16 mm) 9/16 (14 mm)
1 4/4 7/8 (22 mm) 13/16 (21 mm)
1 1/4 5/4 1 1/8 (29 mm) 1 1/16 (27 mm)
1 1/2 6/4 1 3/8 (35 mm) 1 5/16 (33 mm)
1 3/4 1 1/2 (38 mm)
2 8/4 1 13/16 (46 mm) 1 3/4 (44 mm)
3 12/4 2 13/16 (71 mm) 2 3/4 (70 mm)
3 1/2 3 1/4 (83 mm)
4 16/4 3 13/16 (97 mm) 3 3/4 (95 mm)
• 1 inch = 25.4 mm

1) S1S - Surfaced one Side

2) S2S - Surfaced two Sides

Common Hardwood Species

• Oak
• Walnut
• Basswood
• Beech
• Birch
• Butternut
• Chestnut
• Cherry
• Elm
• Gum
• Hickory
• Maple
• Mahogany
• Yellow Poplar

• FAS - First and Second
• best grade - required for a natural or stained finish
• at least 6 inches wide and 8 to 16 feet long
• 83.3% clear wood on the worst face
• Select - No. 1 Common
• minimum 3 inches wide and 4 - 16 feet long
• 66.6% clear wood on the worst face
• Select - No. 2 Common
• Select - No. 3 Common

Related Topics

• Miscellaneous

Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.

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Citation

• The Engineering ToolBox (2009). Hardwood Lumber - Dimensions. [online] Available at: https://www.engineeringtoolbox.com/hardwood-lumber-dimensions-chart-d_1462.html [Accessed Day Month Year].

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