[TowerTalk] Rohn BX bolts, plates and shelves...

[TexasRF at aol.com]

It is somewhat puzzling that there is no mention of wind loads or wind  
survival speeds at that web site. Wonder why that is?
 
Gerald K5GW
 
 
 
In a message dated 6/14/2016 9:47:23 A.M. Central Daylight Time,  
towertalk at contesting.com writes:

FYI...

http://www.bxtower.com/

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TBX Tower Series
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From:  TexasRF--- via TowerTalk <towertalk at contesting.com>
To:  sohosources at yahoo.com; towertalk at contesting.com 
Sent: Tuesday, June 14,  2016 10:30 AM
Subject: Re: [TowerTalk] Rohn BX bolts, plates and  shelves...

Kirk, these towers are now made by Thomas  Shelby Co. You can find them  
with a Google search.

When you  delete the two top sections the tower becomes a model HDBX48 and  
the  wind loading is 18 sq ft. They always said the maximum boom length 
should  be  limited to 10 ft but most users ignored that directive.

The  section #3 top plate is called a BXT3, rotor plate BXR3. The stock top 
  
plate is drilled for a plumbing floor flange. Many users simply screwed a  
short  water pipe nipple into the flange and used it as a top sleeve  for 
the 
mast. If  you want an inexpensive bearing, a Yaesu GS065 is  only $65 and 
can 
be mounted on  the BXT3 plate.

Bolts, most  likely the existing bolts are fine but that is your call.

Foundation  hole size for an HDBX48 is specified at 5' 9" square, 4ft deep. 
 
It  takes 4.9 cu yds. There is a hinged base, BXHC78, with 3/4" anchor rods 
  
and a fixed base, BXB8 made with 4ft stubs available. Some users have made  
their  own base stubs from galvanized plumbing pipe. A 10ft length of  the 
1.9" OD size  cut into three pieces and drilled for the legs  bolts would 
be a 
good  choice.

These were great towers for the  money back when Rohn was making them. I  
have not seen one of the  Shelby models and I see the pricing is much 
higher 
now,   naturally.

Whatever you do, don't plan on re-galvanizing the sections  as the rivets  
will melt and you will have a giant erector set on  your hands. 

Hope you find some use for this info.

73,
Gerald  Williamson K5GW
GM Texas Towers







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