The strongest way to join a deck joist to a corner joint

deckjoists

I'm working on designing the support frame for a deck for my backyard.

The basic shape of the deck:

enter image description here

It's essentially a square with one corner chopped off. The red line is the joist in question, the green lines are the remaining joists and the yellow(ish) lines are the stringers in between.

My question is how do I attach the red line joist to that corner joint? I'm pretty sure there are 45 degree angle joist hangers for the rest of the joists. Is this the best way to lay them out, or is there a better way to arrange the joists? The decking will be installed perpendicular to the joists, or parallel with that one chopped off angle. The joists are on 16" centers, measured off from either side of the red line joist. The drawing is oh so very not to scale 🙂

Best Answer

I guess I'm curious why you wouldn't simplify the layout like this:

Yellow = deck joists

Green = support beams

Deck Drawing

Your decking would run diagonally over the joists. If you use 2x boards for decking, that should be fine if the joists are 16" on center. If you want to use 5/4 decking, you should probably put the joists 12" on center so that the diagonal run is closer to 16".

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