I had found a nice piece of steel pipe in the basement that I wanted to use as a pullup bar, but it was covered in rust. I sanded it down until it looked and felt nice, and made some wooden mounts out of 2x4s. Mounting it wasn't too difficult, I just leveled it and attached the wood. To secure it, I used some bolts on the edges of the mounts to make sure it won't move, and then put some screws around them to make sure it won't turn or raise up out of the mounts (not that it would defy gravity for no reason).
However, I wan't sure if it was safe for me to use - especially if I wanted to do weighted pullups. I didn't really want to test my own weight first, because it might come crashing down, so I hooked up some straps to six 45 lbs plates (270), and moved the support away. It bent, but didn't move, creak, or anything. However, my problem that I didn't anticipate happened - I couldn't get the weights off. The straps stretched and the bar bent, so the support was too tall to get under. Besides, it was really heavy. So I ran to the garage and got some long-range bush clippers, clipped the strap on one side, and all was safe, thankfully. I am going to use those straps to make some more lifting straps. If I hadn't cut it, that would have hung for years.
Also, I put a piece of wood to get the insulation out of my face, and I have no problems with head space, although it looks like I am hitting my head in the picture, I have plenty of room.
Pullup:
-BW x 2 x 5 reps
-50 lbs x 5
-BW x 5
