The thickness of hardwood lumber is measured in quarters of an inch. So a 4/4 (four- quarters) would be 1″. This is the thickness before surfacing and the number you use to calculate board feet. This is also the thickness you pay for, even though, after planing, the thickness may be only 3/4″. The chart shows the typical thickness for hardwood lumber before and after planing. (What is softwood?)
4/4 = 1″ 13/16″ 3/4″
5/4 = 1-1/4″ 1-1/16″ 1-13/32″
6/4 = 1-1/2″ 1-1/4″ 1-13/32″
8/4 = 2″ 1 3/4″ 1-1/2″
4/4 (four-quarter) lumber is 1″ thick when rough sawn. When 4/4 lumber is planed, it is typically finished at 13/16″ thick.
5/4 (five-quarter) lumberis 1.25″ thick when rough sawn. When 5/4 lumber is planed, typically it is finished at 1.063″ thick.
6/4 (six-quarter) lumber is 1.5″ thick when rough sawn. When 6/4 lumber is planed, typically it is finished at 1.25″ thick.
8/4 (eight-quarter) lumber is 2″ thick when rough sawn. When 8/4 lumber is planed, typically it is finished at 1.75″ thick.
12/4 (twelve-quarter) lumber is 3″ thick when rough sawn. When 12/4 lumber is planed, typically it is finished at 2.75″ thick.
16/4 (sixteen-quarter) lumber is 4″ thick when rough sawn. When 16/4 lumber is planed, typically it is finished at 3.75″ thick.
We’ve worked with everything we sell, and we only sell what works.
If you need it, KenCraft carries it.
We’re talking about well over 50 products for your projects, including some of the best- known names in woodworking supplies. And we maintain reliable inventory of the “small stuff” woodworkers depend on:
Jim Fitzgerald has completed a Walnut Tripod and Camera with an antique appearance. He is using Walnut purchased from us here at Kencraft. He uses hand tools in the work he does. The film size is 8 x 20 and the camera weighs about 14 pounds. The Camera and Tripod have been finished with Watco […]
Ralph Kraft is a local craftsman who spends his free time creating these beautiful miniature pieces of furniture for his wife to display in the Victorian and Long Ranch doll houses that he has built from scratch for her. Each piece is handcrafted using a variety of technique, including a mini lathe with a duplicator […]
Since 1965, KenCraft Company, Inc. has dominated the hardwood lumber industry in Northwest Ohio and Southeast Michigan. Today, KenCraft is a family-owned and family-operated company in its 2nd generation.