TEK screw thru the inside of the square tube stringer
Exactly. #10 3/4 Tek hex head. 4 per support/ but I'm probably going to go back and add a 5th just to be safe. I didnt get them welded because I was affraid the powder coat would have gotten messed up AND it was originally galvanized and my welder didnt want to touch it.(Funny about these welders, half say no big deal with galavnized steel, half say it will kill you).
I Put the other two post and rails up yesterday. WAAAAAY harder than I thought with that angle to consider and no room for error. The first one I screwed up, but the rest look pretty good.