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Re: [TowerTalk] Anchor Bolts US Tower

To: "Brad L. Tracey" <>
Subject: Re: [TowerTalk] Anchor Bolts US Tower
From: Grant Saviers <>
Date: Tue, 04 Sep 2012 21:08:26 -0700
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My experience with a new steel structure was quite different. All heavy structural ("red iron") steel to steel bolts were tightened with a torque wrench. In some cases to 200 ft-lbs for the A36 fasteners. It took two guys and a big torque wrench. In fact a special inspection was called out by the building permit. (King Cty, WA)

For the structure to footing embedded bolts, I think "snug" is the appropriate description.

I hadn't seen the UST FAQ when my HDX589's went up so called the factory and got the "snug" BS answer. Portland Bolt has torque specs for different bolt grades, and the 589 leg to base bolts should be torqued to over 600 ft-lbs. I stopped at 175 ft-lbs, which may qualify in UST engineering terms as "super snug". It took several passes across each leg set to get all bolts to that level. I checked them a month later and all were essentially unchanged.

Grant KZ1W

On 9/4/2012 9:45 AM, Brad L. Tracey wrote:
        I'm not going to get into the tower cable lubricate part of the
group with US Tower. But to answer Jim's comment about snug fit. As a
Commercial Contractor I build a lot of Pre-engineered building and the
manufactures (Butler, Metallic, ect) and all of them say the same thing
about their anchor bolts and bolts holding the buildings components together
and that is "turn of the nut method" or snug fit. Just meaning as tight as
you can get with a standard wrench with using bare hands. I know it sounds
silly but that is a very common practice in my line of work. Most of the
engineers I work with agree with it to. I'm not trying to act like I agree
with anything US Tower says or be rude to you but just wanted to let you

Brad N3NRN

  It would be nice if  UST provided detailed instructions on  how to
re-cable their towers.  They insist you recable their
towers, but then wont provide the info.   Check out their info on how much
torque required for both the anchor bolts  +
leg bolts..... answer,  snug fit.   What kinda  BS  answer is that.

Jim  VE7RF

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