[Towertalk] How To Hold Up A 20' Mast On The Ground?

[Robin Midgett]

Greetings TT,
I'm seeking constructive advice on how to hold a 20' mast upright on the 
ground while antennas are installed onto the mast. The plan is for a crane 
to place the mast & antenna assembly into the tower top once the tower is 
built & the antennas are on the mast. A stake through a plate driven into 
the ground is easy enough to keep the bottom of the mast from moving 
laterally; how should a person keep the thing upright without hindering the 
antenna installation?
I have an idea of using guy wires to hold the mast upright & of using 
scaffolding as a work platform to install the antennas, working from the 
top of the mast downward. What say you?

Thanks,
Robin Midgett KB4IDC
VHF+ Glutton