Here is an idea for a DIY fat bar that is just about as easy and cheap as you can get.
First, you need a piece of pipe about 6-7 feet long. I found this pipe in a junk pile and it was F-R-E-E, my favorite price. It’s not 1.5″ pipe, which is the ideal size and what most commercial fat bars are made from. Mine is (I think) 1.25″.
To put it together, I simply found the middle and marked off 52″ between where I wanted the collars. For the collars I used a rubber coupling that you can find in the plumbing section of your hardware store.
I just loosened the metal clamps, sprayed some WD40 inside the coupling and slid it over the pipe. I had to tap it on with a hammer to get it all the way on, then I tightened the clamps and my fat bar was finished.
To hold the weights on you can use simple pinch clamps like this:
Or you can use a weightlifting wrist wrap:
Just wrap it as tightly as you can around the bar and secure with the velcro.
The total cost for my fat bar ended up being $8.00 ($4.00 a piece for the couplings), and it took me about 15 minutes to put together.