I need some help figuring out if what I want to do will hold the weight I want it to. My basement is unfinished and has the floor joists from the floor above completely exposed. I want to mount a pull up bar from the joists similar to the one in this picture.
I want to modify it a little though. I want it to look like a "W" consisting of 3 12" pieces of 3/4" iron pipe as the down rods, connected to 2 elbow joints on the ends and a T in the middle. Between the elbows and the T will be a 48" piece of 3/4". The maximum amount of weight that will be on the entire structure is about 400 pounds with slightly more being on one side. Will the pipe hold this or should I build two bars identical to the one in the picture?
Now, the part I am most worried about is mounting it to the joists. The joists are wooden I beam joists (I think that's what they're called) about 18 inches apart. Can I mount the flanges directly to the joists? If I need to attach at a place between joists, will a 2x4 attached to the joists with lag bolts be strong enough to hold the bar? For some reason, I just can't see a 2x4 being strong enough to hold that.
Any thoughts are appreciated and if needed, I can try to explain my thoughts a little better.
Thanks