[David Lee K]

I am making a 5 foot cross from 2X untreated construction lumber which will be used outdoors one month a year. Would a half lap joint be suitable, this being a cross-grain situation. If not, what would be the best option? I plan to use outdoor stain/sealer.

 

[mdntrdr]

If you are referring to a cross lap joint, where both pieces are notched, that would be the best joint. :smile:

 

[David Lee K]

how would the wood be allowed to expand or isn't that a problem

 

[mdntrdr]

how would the wood be allowed to expand or isn't that a problem

For your application, I don't see it being a problem. Const. lumber is fairly wet when you buy it. It will more than likely shrink. :yes:

 

[David Lee K]

thanks

 

[jaydawg74]

I use cedar for the ones I build, with the cross lap joint. Titebond III, no screws.

Here's two of mine...

 

[red]

A half lap joint would be fine and seal the wood well!

Red

 

[David Lee K]

thanks for the tips.