W8IO roof tower

W8IO Rooftowers LLC - 8 Foot Very Heavy Duty Ham Roof Tower

(updated 24 January 2022)

Models IO-810HD and IO-815HD are not available at this time. 

IO-815HD Ham Roof Tower   (full kit) - Currently not available

Specifications IO-815HD Closest Competitor's TowerTotal Height
Height above Tower
Max. Antenna Area
 at 80 mph

(sq. ft.)
List Price

8015AL 2"OD .15w
Tower Height 8 feet (96 inches) 9 feet (108 inches)8.50.515AL 2"OD .15w
Base Width 32 inches 36 inches9113.3AL 2"OD .15w
Tower Weight 70 lb. 54 lb.9.51.512.6AL 2"OD .15w
Max. Antenna Wind Area at tower top 15 sq. ft. at 80 mph, 90% within 1 ft of tower top 23 sq. ft. at 85 mph10212AL 2"OD .15w
Max. Antenna + Rotor + Mast Weight 250 lb. 120 lb.10.52.511.4AL 2"OD .15w
Tower Top Width 5 inches 5 inches11310.9AL 2"OD .15w
Rotor Plate location from Top 64.5 inches 34.75 inches11.53.510.4GS 2"OD .12w
Rotor Mounting Options Hy-Gain or Yaesu (specify when ordering) Hy-Gain and Yaesu12410GS 2"OD .12w
Thrust Bearing (recommended, +$70) Yaesu GS-065 (specify when ordering) recommended12.54.59.6GS 2"OD .12w
Maximum Mast Diameter 2.5 inches 2.375 inches1359.2GS 2"OD .12w
Mast (recommended, not included)  2" or 2.5" OD x 10 foot galvanized steel
 Texcom Steel masts  or  US Tower M10
9 feet long max. 2"OD .12w
Leg material 6061-T6 aluminum (1/4" thick x 2" angle) 6061-T6 aluminum
(1/4" thick x 2" angle)
1468.6GS 2"OD .12w
Shelf Material 6061-T6 aluminum (3/16" thick x 2" angle) 6061-T6 aluminum
(1/8" thick x 1.5" angle) Str.
GS 2"OD .12w
Rotor Shelf Material6061-T6 aluminum (1/4" thick x 2" angle)6061-T6 aluminum
(1/8" thick x 1.5" angle)
1578High Str.
GS 2"OD .12w
Foot material 6061-T6 aluminum (1/4" thick x 2" angle) 6061-T6 aluminum
(1.5" x 2" angle)
X-Brace and V-Brace material 6061-T6511 aluminum (3/16" x 2" flat) 6061-T6511 aluminum
(1/8" x 1" flat)
Assembly Hardware 5/16"-18  18-8 stainless steel 1/4"-20  18-8 stainless steel
Foot to Leg hardware 3/8"-16  18-8 stainless steel 3/8"-16  18-8 stainless steel
Lockwashers/nylon locknutsYes (specify when ordering)nylon locknuts
Holes Deburred Yes ?
Part Edges Deburred Yes ?
Climbable Yes - with tower climbing belt or harness No
Tower fully assembled before shipmentYesNo

W8IO 8 foot very heavy duty roof tower  W8IO 8 foot very heavy duty roof tower  

                   Model IO-815HD 

The IO-815HD is perfect for moderate sized HF beam antennas such as the Mosely PRO-67C, Hy-Gain 203BA, 204BA, Explorer-14, TH7DX, KIO 5-band Hex Beam, ... The IO-815HD is also one of the best roof towers to use for stacking a VHF beam along with a small HF beam.
 Model IO-815HD Manual 8 Oct 2018   (new)

 Model IO-815HD Rooftower calculations

It has become very expensive to ship the 8 foot tall roof towers! If you can buy the 8 foot tower legs locally and drill the holes, I can cut, drill and ship you the shorter parts at a reasonable cost. 6061-T6 aluminum angle can be purchased through  OnlineMetals.  They have warehouse locations in Toledo, OH; Wallingford, CT; Atlanta, GA; Dallas, TX; Los Angeles, CA and Seattle, WA. Speedy Metals has warehouse locations in Milwaukee, WI; Appleton, WI; Rockford, IL; Fraser, MI.  Zoro has 6061 aluminum angles and orders over $50 ship free!

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contact Roger: email to 

rgcox2 (at) gmail.com

Roger Cox, W8IO (ex-WB0DGF) - Spring Lake, MI 49456