MANUALS:

Model IO-45HD Manual (4.2 foot) roof tower
Model IO-610HD Manual (6 foot)roof tower
Model IO-810HD Manual (8 foot) roof tower
Model IO-815HD Manual (8 foot) roof tower

REFERENCES:

“Tower and  Antenna Wind Loading as a Function of Height”, Frank Javanty W9JCC, QEX July/August 2001, pp 23-33
EIA/TIA-222-G Explained
How to Strengthen your Roof with Collar Ties
The Mathmatics of Rafter and Collar Ties
Calculations for the IO-810 roof tower.

TOWER KIT DESCRIPTIONS

A detailed description of the specifications of each tower is available in a link below the tower. The Tower Kits include all of the aluminum structural parts and the assembly bolts, washers and nuts.

THRUST BEARINGS: