This is a tutorial on how to make a doorway pull-up bar that does not require holes in any door frames or walls to mount it; which makes it perfect for college dorms or other temporary living quarters. It pushes against the door at two different points when weight is applied to safely wedge itself into the frame without the use of screws or bolts. It has an estimated maximum capacity load of 300 lbs. It allows for wide, regular, close, and hammer-grip pull-ups and chin-ups. Some of the work for this instructable are inspired by Shenandoah of
http://www.angelfire.com/ny5/shenandoah/Grunt/Bodyweight.html and other commercial products on the market.
We need to measure the width and depth of the door to be used. Most door frames will more or less have the same general dimensions, but it is important for weight distribution. Look at the pictures for more details.
Thanks for the idea.
matt
First of all, I'm glad you like the instructable. Second, I weigh 135 lbs but have hung a dynamic weight of 210 lbs (me plus 75lbs of weight in a backpack hanging off of my back), from my pull up bar and have not experienced any damage to my walls. Note in the pictures that the wall I use is an exterior wall of the house. It connects the garage with the side yard; there has been no damage. I have also used it in one of the bedrooms inside, with no damage as well. Just be careful with the tape as it may get dirty overtime and smudge the wall or make the wall sticky from the tape adhesive. Perhaps covering the contact points with a more plasticy type of tape that will not squeeze out adhesive when under stress will be safer. Just a caution. Hope I answered your question. If you have any other questions, please feel free to ask.