Using 2 different size boards for your frame and joists

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    This is desperately short on details. What kind of span? What kind of spacing? Where in the world are you? What kind of load are you expecting (will there be a hot tub on the deck)? Can you? Sure, why not. Should you? Who knows based on what info you've given us. This question is like me asking you, "Can I paint my car 2 different colors and still get my plates renewed?"
    – FreeMan
    Oct 28, 2022 at 11:48

2 Answers 2


Like as in using two different sizes in one project?

You can mix and match sizes to your heart's content, you just have to use enough that for your span and spacing they are sized appropriately to meet the requirements for strength and deflection.

I think asking this question though is a sign you should take a step back and further evaluate what you don't know before you invest a ton of time and money into this.


Of course. I used 5.5x11.75 PSLs and 2x12s for my beams and 2x6s for my joists.

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