W8IO roof tower

W8IO Rooftowers LLC - 4.5 foot Ham Roof Tower

(updated 10 Oct 2023)

IO-45 Ham Roof Tower          

Specifications IO-45 Competitor's Tower

Tower Height 4.5 feet (54 inches) 4.5 feet (54 inches)
Shipping Weight 27 lbs. 17 lbs.
Base Width (to outer edge of leg) 25 inches 24 inches
Base Width (to outer edge of foot) 29 inches 26.75 inches
Max. Antenna Wind Area at tower top 10 sq. ft. at 80 mph 10.2 sq. ft. at 85 mph
Max. Antenna + Rotor + Mast weight 150 lbs. 125 lbs.
Tower Top Width 5 inches 5 inches
Rotor Plate location from Top 34.5 inches (bottom shelf) 34.75 inches
Maximum Mast Diameter 2.5 inches 2.375 inches
Maximum Mast Length 7 feet (84 inches) 5 feet (60 inches)
Rotor Mounting Options Hy-Gain or Yaesu
Hy-Gain and Yaesu
Thrust Bearing Mounting Options Yaesu GS-065 or GS-050
TB-25 (optional)
Fixed (non-rotating) Mast Option UMB-1
MC-10 (optional)
Leg and shelf material 6061-T6 aluminum (1/8" thick x 2" angle) 6061-T6 aluminum (1/8" thick x 1.5" angle)
Foot material 6061-T6 aluminum (1/4" thick x 2" angle) 6061-T6 aluminum (1.5" x 2" angle)
X-Brace material 6061-T6511 aluminum (1/8" x 2" flat) 6061-T6511 aluminum (1/8" x 3/4" flat)
Assembly Hardware 1/4"-20  18-8 stainless steel 1/4"-20 18-8 stainless steel
Foot to Leg hardware 5/16"-18  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

4.5 foot roof tower4.5 foot roof tower

          Model IO-45

The IO-45 is perfect for small and moderate sized HF beam antennas such as the Hy-Gain Explorer-14, KIO 5-band Hex Beam, Traffie Tech HX-5Bi, DX-Engineering HEXX beam, K4HEX hexagonal beam ...

Assembly and Installation Manual for IO-45 (4.5 foot) roof tower

Check out the reviews of the IO-45 or add your review on eHam.com

YouTube video of IO-45 roof tower assembly and K4KIO Spiderbeam by Cal McKitrick AI6MC.

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contact Roger: email to 

rgcox2 (at) gmail.com

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