Corner frame layout question

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Hi all, I have a greenhorn question about best practices for a corner frame layout.  When you are using square stock to make a X, Y, and Z, connection how do you do it or what is the best way to do it?1. Mitering the X and Y then add Z? (totally enclosed corner)2. Butt joints to the Z piece? (open bottom)3. Butt the X and Y (L-shape) then add Z? (open X or Y)I am laying out the frame of a cabinet smoker and thinking of different ways. I would think #1 is the strongest or does it really matter?
Reply:Square stock or square tubing?I don't know which is best but would do #1 or #3. I would cap the open end on #3 unless the opening is used for something nested, etc.GravelThe difference between theory and practice is that in theory there is no difference.
Reply:Sorry, I should have added that info.  I am using 2" x 2" 16 ga steel tubing as the interior frame of a BBQ smoker.  It will have 18 ga sheet skins on interior and exterior.
Reply:#3 will probably be easiest since the ends will be capped by the skin.Don't forget to post build pics.GravelThe difference between theory and practice is that in theory there is no difference.
Reply:the burnt out stick welder has a question for the greenhorn; what the heck is a x,y and z connection?i.u.o.e. # 15queens, ny and sunny fla
Reply:It is a corner layout where 3 parts come together.  The 3-axis represent North-South, East-West, and elevation or height.  They say a picture is worth a thousand words, so this is what I mean. Attached ImagesLast edited by hntbambi; 04-19-2014 at 09:39 AM.
Reply:the pic helped. thanks.i.u.o.e. # 15queens, ny and sunny fla
Reply:I normally 45 X & Y, then Z just butts to the X & Y.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400