I'm going to make a swing as a project with my kids. I'm constrained by the timber available and wondering if doing the whole thing with 4 by 4's will be ok rather than a thicker top bar. Or if I could double up on the top bar?
Ten foot high and close to that wide is my plan so far, all legs concreted into the ground 50cm, but I want 2 swings on it, rather than just one.
Will an a-frame bolted together with 4 by 4's be safe? Would I need to double up the top bar?