Jim,
When I asked UST for the torque on my HDX589s, the answer I got was
"what a man can apply with a standard wrench." Very techie, those UST
engineers!
I used a torque wrench set for 140 ft-lbs (w/o lubrication) for
everything, about 1/5 of what Portland Bolt specifies for the leg bolt
grade/size. I found it took 3 cycles to get all leg bolts about the same.
Grant KZ1W
On 6/25/2013 5:39 AM, Jim Thomson wrote:
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
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|