KO4XJ's
Verticle Radial Bracket
 

This is a simple project, go to Lowes or Home Depot or your hardware store that sells panel boxes and get 4 bus bars.

Depending on the size $7.00-$9.00 More for larger ones

I used some aluminum stock to secure the corners, it's not necessary. Attach it to your vertical and mine has enough for approx 80 radials

QSY