W8IO roof tower

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

(updated 10 Oct 2023)

IO-815HD Ham Roof Tower

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

(sq. ft.)

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 inches
9113.3AL 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 mph
10212AL 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 inches
11310.9AL 2"OD .15w
Rotor Plate location from Top 64.5 inches 34.75 inches
11.53.510.4GS 2"OD .12w
Rotor Mounting Options Hy-Gain or Yaesu
Hy-Gain and Yaesu
12410GS 2"OD .12w
Thrust Bearing (recommended, +$70) Yaesu GS-065
recommended 2"OD .12w
Maximum Mast Diameter 2.5 inches 2.375 inches
1359.2GS 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
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

Return to MAIN MENU

contact Roger: email to 

rgcox2 (at) gmail.com

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