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
“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.
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.
We use the Yaesu GS-065 thrust bearing that is able to take a 2 1/2 inch mast size.
Carlson Communications has been making Telecommunication niche products since 1986. The Optaphone brought telephone service into thousands of homes, businesses, federal and state parks like the Grand Canyon, mines and pay phones in dozens of countries including Sri Lanka.
The product is warranted against defects in workmanship for two years from date of purchase. It is not warranted against acts of God such as wind that exceeds the structural design limits. Warrantee claims are limited to the original cost of purchase. Also see the section in the instruction manual for mounting to roof rafters.