[Antennas] Attaching Antenna to Roof

Fri Apr 22 10:23:38 EDT 2005

Hi all.
I recently bought a house on a city lot with trees on much of the unbuilt
property and have just received news that I will get permission to attach
an antenna to a "widows walk" (viewing deck) on the top of the building. 
My thinking is to put up a 2" mast with something like a Spid rotator
inline and a Fluid Motion 4el SteppIR on top - maybe also a small 2m beam
up above the SteppIR on whatever mast extension the boom guys require.
Is there any literature or resource or advice on how to attach such a mast
securely to a timber structure?
If the attachment allows the mast some degree of vertical movement which
offers easier service access to the antenna, that would also be helpful.
Thanks.
Tony