Lumber Dimensions & DefinitionsLumber Dimensions are confusing.
This page should help clear the air on lumber dimensions.
Normally, hardwood is stated in quarters, i.e. 4/4 = 1" (pronounced four quarter, 5/4 = 5 quarter). In other words, 4-quarter (4/4) equals 1" thick, 5/4 equals 1¼" thick, 6/4 equals 1½" thick, etc.
Usually, you buy in Board-Feet. A board-foot is 144 cubic inches. You calculate board feet by multiplying (inches) length x width x thickness and divide by 144". A piece of lumber 96"L x 6"W x 1½"T = 864" divided by 144" = 6 board-feet.
Board footage is calculated on lumber prior to surfacing, and often prior to drying. When buying planed Hardwood, sizing is more confusing. It depends on S1S (surfaced on one side) or S2S (surfaced on two sides. Even S4S Lumber (surfaced 4 sides) is sanded on one side only.
When you buy planed wood from the Home Centers, the 4/4 board is only 3/4" thick. If the width states 6", it may only be 5½". You are paying for waste.
Where to buy quality hardwood.
This link takes you to a quality lumberyard that sells direct to you. You can order special thickness by request, and they provide oversized lengths. There shipping costs are most reasonable. They give net lumber dimensions as well: Quality Lumberyard
FAS (First and Seconds)
Select & Better
No. 1 Common
ANSI Plywood Grading Standards
Plywood is graded with a two-character stamp, such as A-1, B2, etc.
ABOUT PLYWOOD GRADES
Hardwood Lumber grades are objective. There are no "gray" areas from the high end of one grade to the low end of the next higher grade.Plywood grading is a visual standard. It becomes subjective from one plywood grader to another. Grading rules use terms like "blending, inconspicuous, occasional, slight and sharp contrast". This makes for "gray" areas. There is always some degree of overlap in appearance from the top of one grade and the bottom of the next higher grade.
I would not use much below A1-2 for anything. Otherwise, you can have trouble down the road.
Since plywood is getting thinner by the year, you may want to consider resawing solid wood to size. Then use tongue & groove to edge joint a solid piece. You make solid table/desk tops that way. You will see an easy technique to center edge joints on Center Edge-to-Edge Joints near the center of the page.
Be careful of lumber dimensions when searching for wood.
Search This Site
Return to Top | Home |
Best Place to Buy | Woodworking Jigs | Woodworking Plans | Wordworking Router | Patterns & Templates |
Machinery & Equipment | Table Saw Safety | Woodworking Shop | Woodworking Supplies | Woodworking Hand Tools |
Woodworking Finishing | Woodworking Joints | Project Gallery | Woodworking Ideas | Woodworking Truth |
Beginner's Guide | Woodworking Tradeshow | Your Projects | Buy - Sell Equipment |
Copyright © 2007 - 2010 - ProvenWoodworking.com - All Rights Reserved
No Reproduction Permitted without Permission.