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Tongue and Groove

Tongue and Groove (T&G) on APA Panel

The Tongue and Groove (T&G) marking on an APA trademarked panel indicates that it has a tongue and groove profile on its two long edges; and that this is to an APA approved pattern.

See examples on APA trademarked OSB panels.

Technical Notes
  • This T&G profile removes the need for support (blocking) under adjacent panel edges to prevent them from deflecting independently of each other when load is applied.
  • The material removed to create the tongue normally reduces the width of the panel by approximately 12.5 mm (1/2”), therefore, the net width of the panel may be 47-1/2” (1206 mm).