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Re: [TowerTalk] Anchor bolts for LM470

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Subject: Re: [TowerTalk] Anchor bolts for LM470
From: "KR7X" <>
Date: Sun, 15 Apr 2012 09:12:41 -0700
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The alloy call out is actually ASTM F1554 Gr 55.

These are carbon steel anchor rods (newer terminology) with 55,000 psi yield

There is no need and it is not recommended by American Concrete Institution
(ACI) 318 design specifications for reinforced concrete to use hooked (J)
anchor rods in tension situations without reducing the tension capacity
significantly for hooked anchors on account of the crushing of the concrete
at the bend radius.

Google "St. Louis Bolt" for a major supplier in the Mid-West. If you were
out here on the West Coast I would suggest "Portland Bolt". You could also
try some major steel fabricators like Falcon Steel or Valmont also.

Good luck with your tower installation.


Lonberg Design Group, Ltd.
H. S. Lonberg, P.E.,S.E. / KR7X

-----Original Message-----
[] On Behalf Of Glen Turner
Sent: Sunday, April 15, 2012 7:27 AM
Subject: [TowerTalk] Anchor bolts for LM470

Looking for a good source of anchor bolts to be used on LM470 tower.
Needing 6 bolts about 1" by 27" with J bend or angled.
Spec seems to call for ANSI F155 4 grade 55 bolts.  Anyone have spares or
know a good source in Midwest US?  Glen W5IF


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