There are a number of commercial designs that mimic the general design of this chinup bar - the benefit of this design is that it is incredibly sturdy, low cost, and adaptable to many door frame designs. This design is intended to work with very deep frames, as commonly found in older buildings. These deep frames are often incompatible with the commercial chin-up bars.
We will be building out of 1" Schedule 40 Steel Pipe (actual outer diameter is closer to 1.315"), and EasyFit structural pipe fittings. There are a number of structural pipe fittings available out there, all of which would be acceptable, but EasyFit is about the cheapest, and still high quality.
Refer to the attached Sketchup file for details as you work through the design!
Some design goals:
- Adaptable to many door frames
- Multiple grips for different workouts
- Enough extension away from the doorframe that you don't bonk yourself while lifting
- Solid grip for the hands
Step 1: Make Your Measurements
There are four critical measurements:
- The depth of the doorframe, measured from the outermost edges of the trim on both sides.
- The width of the doorframe, measured from inside edge to inside edge.
- The width of your door trim.
- the thickness of your door trim.
- Make the rear vertical supports about 5" longer than the trim is wide - that wil give it enough room to pivot and slide into place with the rear brace in place.
- Make the rear brace about 1.5" tall, and slightly deeper than your trim is deep (I used 3/4" MDF).
- Make the length of the bars going under the doorframe about 7.5" longer than the frame is deep - that will give you enough room to mount the front braces such that the bar will have enough clearance to slip up into place, but still leave enough front extension that the actual chinup bar will be extended about 6.5" from the doorframe.
- Make the width of the main chinup bar at least 7" wider than the doorframe, giving yourself a wide enough bar for wide grips. 36" would be a good minimum, with up to 44" being useful for your workout.
- The front support braces should be wide enough to completely cover the trim, at least 5" minimum.