Adding Wheels to Old Wrigley Field Seat

Several years ago, my dad received an old Wrigley Field seat as a gift, and due to lack of space in his office nowadays, I've claimed it to use as my workshop seat.  The upside?  It's an old Wrigley Field seat!  The downside?  It has no wheels!  And we all know how important it is to be able to move around in your seat.  So I decided to add wheels to it - not a difficult task but what an improvement!

The seat is bolted to two 1-1/2" heavy duty metal bars - a perfect base to work with.  There are lots of ways to get wheels onto this thing but I decided to go with casters, metal plates, and machine screws because I wanted to be minimally invasive (i.e. not drill into the bars).  The parts I purchased were:

- four 2" casters
- four "mending plates" (basically just metal plates I found in the hardware store that had holes that aligned with the holes in the caster plate)
- sixteen 10x24 x 2" machine screws
- sixteen 10x24 locking nuts
- and the most important piece is obviously the seat itself

- Start by making all four caster-plate assemblies as shown in the photo.  Doing this first will make attaching everything to the seat base much easier - you won't need to employ a few friends to help hold all the pieces.

- Once you have the assemblies, you can slide them onto the base of the seat and tighten.  To tighten, use a screwdriver and a combination wrench, and tighten the screws gradually (rather than tightening one all the way, then the next).  This will ensure the plate remains parallel to the caster plate and everything fits nicely.

- Once you have all four on there...you're done!  Nice work.  Now sit in the seat, roll around, and do great work!