[TowerTalk] UST bolt Torque question

[Patrick Greenlee]

What, your Harbor Freight torque wrench doesn't have a "Snug" setting?

Don't feel obligated to tighten the mounting bolts in some proportion to 
their yield strength or max working torque.  Once the "slop" is gone (at 
torque values less than 100 lb ft for the hardware in question) additional 
tightening really doesnb t help.  If it makes you feel better tighten then to 
within 1/e of their rated working torque. It won't make the assembly more 
robust but it may make you feel better and give you a sense of 
accomplishment.  For this purpose I have a torque wrench that is about 4 ft 
long and is calibrated up to 600 lb-ft .

Patrick AF5CK

-----Original Message----- 
From: Jim Thomson
Sent: Tuesday, June 25, 2013 7:39 AM
To: towertalk at contesting.com
Subject: [TowerTalk] UST bolt Torque question


I asked UST  how much Torque should be used on both the 12 x  1.125 inch 
anchor rods....and also the 18 x  1 inch leg bolts.
I also told em I used never seize on both anchor rods and legs bolts.  Also 
told em the anchor rods are 104 ksi yield strength..and
came from portland bolt...and are 60 inchs long each.... with 6 inch threads 
on each end.   Told em that the 18 x leg bolts are
A325 bolts and are 3 inchs long each.    Everything has heavy duty flat 
washers and slightly oversized nuts on em.

Their reply was...... snug fit !    This is for my UST  HDX-689 tower.  This 
is the old style 689..that weighs 5000 lbs..without the ants and mast, but 
that
weight includes the bearings  and small  PP  rotor.   The crane operator 
weighed the tower when it was unloaded.

What is  ..snug fit ?     Trying to get  answers from UST at times can be 
exasperating.
Does anybody even know ?    I was thinking  perhaps  125 ft lbs for the 
anchor rods......and 100 ft lbs for the leg bolts.   Leg bolts can always be 
replaced...
anchor rods cant.

Tnx...  Jim   VE7RF
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