Plywood stamp...........

Isn't ALL construction plywood supposed to have an API stamp on it? WHen I was in the union I laid/hung thousands of sheets of CDX, for 3/8" to 1 1/8". The inspectors always wanted to be able to see the stamp.

I thought I remember in apprentice school when we learned what the stamp was and how to read it, that all construction plywood was supposed to have a stamp and you should be able to read it, wherever it was, by walking the floor.


Well, here's the thing; I just bought a couple of sheets of 3/4" CDX from HD and when I was cutting it to size for the counter I realized that there was no stamp. It wasn't faded or even a light, partial stamp, it just wasn't there.

Isn't the stamp mandatory?

It's only required if the building code requires it for construction. If the use is not for construction, then the stamp is not required.

If the building inspector wants to see it, it's required.