[TowerTalk] Rohn 55G Guy Brackets Questions

[Byron Tatum]

Hello-
  I am putting up a 55G guyed tower using 3 of the GB-55G guy brackets. I will be using 5/16" guy wire at all 3 levels. My questions are these:
    1. I have the TB-55 torque arms and am considering using them, and I realize I will need to use a shackle to attach the 7/16" thimble to the torque arm hole. Rohn states in their latest catalog to use a 3/8" shackle for this. I looked up the 3/8" Crosby G-209 specs and the working load is 1 ton. I believe they are proofed to double the working load, and the ultimate strength is rated at around 5 times the working load. It appears to me this shackle is not quite matched to the ratings of the 5/16" EHS guy wire. I have not determined the hole size in the TB-55 arm to see the largest size shackle that will fit. Any suggestions on this?
   2. I saw this information in an authorized Rohn dealers online catalog and it has further confused me. Quoted below:
       ROHN TB55D Torque Bar Option for the GA55GD Guy Attachment
One Bar per Order. Three Bars would complete 3-way down guy. Modifies a GA55GD into a Torque Stabilizer Assembly that could be installed at existing Guy attachments on any horizontal brace as opposed to tower section joints. This Item will also require the 3/8 inch shackles to complete the upgrade. This Anti-twist device would be located in the area of the Microwave or other Focused Beam antennas to provide resistance to torque. Use only 3/16 inch Strand for down guy to this attachment! 

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ROHN TB55D is an upgrade attachment option for the GA55GD, when completed with  3/8" shackles. for a complete Torque Arm Stabilizer assembly, refer to the R-TA55, also sold here. American Steel... Buy ROHN, Buy American.

  Can someone help clear up this confusion for me please?
     Thank you, Byron WA5THJ