Trick:
Please make sure you check with the serving utility (POCO) for any spec they have.
As to thebraces, back when TV antennas were popular, along with CB antennas, a place like radio Shack (or equal) had antenna tripods that you could easily adapt. Most had an ERTL label on them!!
I've seen everything from guy wire to steel beams used.
BTW, the 'mast kit' has a rubber boot and insulator included.
