I have 150' of Rohn 65G. I picked this tower up ( scrap steel price). it's the
20ft sections except for the tapered base ,it's 10'.
W3MM has a Rohn 65G /SSVT gin pole, But I opted to use a crane. Three sets of
guys ( also Polygon fiberglass rod)
I pre prepared the tower for three lifts 60' 60' and 30'. Each 60' lift had
the poly rods pre attached and terminated B-4 the next lift.
The crane arrived at 8:15AM and gone by 11:00AM .
You have a BIG wind load above the top guy and IMHO would opt for the 4th set
45.90,135,180 and a 20' top section free standing.
The stuff is Varsity big league tower . not something a single climber can
muscle around like 25.45 or 55 G Heck the side rails are 2" OD 125 wall. the
rungs step is 21+ in. ( Takes some getting use to the BIG step)
73's Wayne W3EA
> From: Jim.email@example.com
> To: firstname.lastname@example.org
> Date: Wed, 17 Feb 2010 05:10:07 -0800
> Subject: [TowerTalk] ROHN 65-G where do we get 200' of it.. + mating gin-pole
> A buddy of mine needs 190-200' of Rohn 65-G.. and pretty soon. He would like
> to use the 10' sections , and not the 20's... if
> at all possible. The plan was to use 3-4 x KX0G rings + KX0G base rotor.
> Also, 3/8" Polygon rod guy wire to be used.
> Top ring was to be at the 165' level.. and have 25' of UN-supported tower
> above it. [ or guy at 175'.. and have same 25' un-supported portion above top
> On that 25' of Un-supported portion, a 2 el 80m yagi [ M2] was to be
> installed, along with a m2 4 x el 40m yagi.. and also a 5 x el 20m m2 yagi.
> Lower down, the plan was for a 2nd 4-el 40m yagi... and also TWO more 5-el
> 20m yagi's... and also single yagi's for 17-15-10-6m.
> IE: 10 [ TEN] yagi's in all. Will 65-G take this kind of load ?? Max wind
> gust ever recorded in the last 10 x yrs at this location was 57 mph [ at the
> 160' level of another tower]
> In looking through old Rohn catalog I have..... the "safe moment of
> restraint" is :
> 45g- 9610 ft lbs aprx $269.00 per 10' section
> 55g- 17,160 ft lbs aprx $319.00 per 10' section
> 65g- 33,200 ft lbs aprx $365.00 per 10' section
> Seems to me that's a huge diff, between 45 g and 55g... another huge diff,
> between 55g and 65g .
> The game plan was to opt for 65-G.... if we can find some... new. The gin
> pole is what's giving us the run around. Any idea's.... or general notes with
> 65-G owners would be appreciated. EG; install procedures unique to 65-g ..
> pitfalls.. 'gotcha's, etc.
> Per Rohn book, 3 x sets of guys are required. But this is a wicked load. 4 x
> sets of guys can be used, if required .
> Later......... Jim VE7RF
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