APA - The Engineered Wood Association

Concrete Form Panels Types

The following is adapted from the Grade-use Guide for Concrete Forms table on page 5 of the APA Design/Construction Guide: Concrete Forming, Form V345. Please refer to that publication for examples of typical trademarks.


Example of a typical APA B-B PLYFORM trademark.APA B-B and B-C PLYFORM Class I & II**

Specifically manufactured for concrete forms. Many reuses. Smooth, solid surfaces. Mill-treated unless otherwise specified.
Minimum Veneer Grade
  • Faces: B
  • Inner Plies: C
  • Backs: B or C

Learn more about APA B-B and B-C PLYFORM Class I & II panels and view product manufacturers.

Typical APA B-B PLYFORM trademark shown.


APA HDO – Concrete Form – or PLYFORM Class I & II**

Hard, opaque resin-fiber overlay, heat-bonded to panel faces. Smooth surface resists abrasion. Up to 200 reuses. Light application of releasing agent recommended between pours.
Minimum Veneer Grade
  • Faces: B
  • Inner Plies: C
  • Backs: B

Learn more about APA HDO – Concrete Form – or PLYFORM Class I & II panels and view product manufacturers. 


APA MDO – Concrete Form –  PLYFORM Class I and II**

Smooth, opaque resin-fiber overlay heat-bonded to one (typical) or both panel faces. Smooth surface resists abrasion. Normally factory-treated with a release agent. Light application of releasing agent recommended between pours.
Minimum Veneer Grade
  • Faces: B
  • Inner Plies: C
  • Backs: B

Learn more about APA MDO – Concrete Form –  PLYFORM Class I and II panels and view product manufacturers. 



Example of typical APA Structural I Plyform B-B trademark.APA STRUCTURAL I PLYFORM**

Especially designed for engineered applications. All Group 1 species. Stronger and stiffer than Plyform Class I and II. Recommended for high pressures where face grain is parallel to supports. Also available with High Density Overlay or Medium Density Overlay faces.
Minimum Veneer Grade
  • Faces: B
  • Inner Plies: C
  • Backs: B

Typical APA STRUCTURAL I PLYFORM trademark shown.


Special Overlays and Proprietary Panels Designed for Concrete Forming**

Produces a smooth uniform concrete surface. Generally mill treated with form release agent. Check with manufacturer for specifications, proper use, and surface treatment recommendations for greatest number of reuses. Learn more about other proprietary concrete form panel types and view product manufacturers.


Example of a typical APA B-C trademark.APA B-C

Sanded panel often used for concrete forming where only one smooth, solid side is required.
Minimum Veneer Grade
  • Faces: B
  • Inner Plies: C
  • Backs: C

Typical APA B-C trademark shown.


Need help reading a trademark or selecting the right form panel? Staffed by engineered wood specialists, the APA Product Support Help Desk is a free service available to answer your questions pertaining to the specification and application of wood structural panels. Contact the APA Help Desk.

*Commonly available in 19/32, 5/8, 11/16, 23/32 and 3/4 Performance Categories (4' x 8' size).
**Check dealer for availability in your area.