W8IO 8 foot heavy duty 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 Tower	Total Height (feet)	Height above Tower (feet)	Max. Antenna Area at 80 mph (sq. ft.)	Recommended Mast
List Price			8	0	15	AL 2"OD .15w
Tower Height	8 feet (96 inches)	9 feet (108 inches)	8.5	0.5	15	AL 2"OD .15w
Base Width	32 inches	36 inches	9	1	13.3	AL 2"OD .15w
Tower Weight	70 lb.	54 lb.	9.5	1.5	12.6	AL 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 mph	10	2	12	AL 2"OD .15w
Max. Antenna + Rotor + Mast Weight	250 lb.	120 lb.	10.5	2.5	11.4	AL 2"OD .15w
Tower Top Width	5 inches	5 inches	11	3	10.9	AL 2"OD .15w
Rotor Plate location from Top	64.5 inches	34.75 inches	11.5	3.5	10.4	GS 2"OD .12w
Rotor Mounting Options	Hy-Gain or Yaesu (specify when ordering)	Hy-Gain and Yaesu	12	4	10	GS 2"OD .12w
Thrust Bearing (recommended, +$70)	Yaesu GS-065 (specify when ordering)	recommended	12.5	4.5	9.6	GS 2"OD .12w
Maximum Mast Diameter	2.5 inches	2.375 inches	13	5	9.2	GS 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.	13.5	5.5	8.9	GS 2"OD .12w
Leg material	6061-T6 aluminum (1/4" thick x 2" angle)	6061-T6 aluminum (1/4" thick x 2" angle)	14	6	8.6	GS 2"OD .12w
Shelf Material	6061-T6 aluminum (3/16" thick x 2" angle)	6061-T6 aluminum (1/8" thick x 1.5" angle)	14.5	6.5	8.3	High Str. GS 2"OD .12w
Rotor Shelf Material	6061-T6 aluminum (1/4" thick x 2" angle)	6061-T6 aluminum (1/8" thick x 1.5" angle)	15	7	8	High 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 locknuts	Yes (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 shipment	Yes	No

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