[TowerTalk] UST bolt Torque question
Jim Thomson
jim.thom at telus.net
Tue Jun 25 08:39:03 EDT 2013
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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