What do the colored stripes on plywood mean?

The colors on the end of the sheet are for the size and if its sanded on one side or both. 1.

How do you read plywood measurements?

Standard Widths and Lengths The most common plywood sheet dimension, 4 feet by 8 feet, translates to the metric dimensions of 1,219 by 2,438 millimeters. Hardwood plywood comes also in abbreviated sheets measuring 2 by 2, 2 by 4, and 4 by 4 feet, while utility-grade plywood comes in longer 4-by-10-foot sheets.

Is plywood stamped?

Each panel or sheet of plywood has a stamp on the back that gives all the information you need. Table 9 lists some uses for construction grade plywood. The number on the left indicates the maximum recommended span in inches when the plywood is used as roof decking (sheeting.

What is ACX plywood?

ACX plywood is a high-grade plywood made not from a species of tree but from veneers, which are thin sheets of peeled wood grain. The ‘A’ in ACX plywood refers to the side of the wood that is considered the ‘front’ — and that can sometimes be sanded — while the ‘C’ designates the ‘back’ face.

What are the grades of framing lumber?

There are two primary grades of appearance framing: Finish and Select. Finish grade is higher quality than Select. Finish grading is only available in lumber from Douglass Firs and Hem-Firs. The grades are Supreme, Choice, and Quality.

What is CML number of plywood?

Look for CM/L numbers stamped on top of the plywood sheets which you can look up online to get the factory details. CM/L numbers are the license numbers of the factories for different grades they are certified to manufacture according to the ISI norms. If the sheet doesn’t have a CM/L number on it, move on.

Does writing go up or down on plywood?

The side with the stamp is the smoother side. When installed smooth side down, the rough surface will then face up and give the worker traction for safety. In addition to safe orientation, the stamping will also face in a convenient direction for an inspector to see.

What does APA mean on plywood?

American Plywood Association
Adhesive and technology improvements eventually led to the manufacture of structural plywood from Southern pine and other species, and in 1964 the Association changed its name to American Plywood Association (APA) to reflect the national scope of its growing membership.