Oops - I have used the wrong term - not a spud wrench. I used a hammer
wrench (aka slugging wrench or striking wrench) for the nuts on ASTM F1554
concrete anchor bolts.
For A325 3/4" diameter shear bolts that fasten the tower to the base I am
using a 1/2" air impact wrench or sometimes a 24" breaker bar.
For what it's worth - I discovered that John at Superior Bolt in Phoenix, AZ
keeps a good supply of structural concrete anchor bolts in stock and seems
to be very knowledgeable & helpful. Last time I bought bolts from him the
cost (including delivery charge) was about half of what the tower mfg's
charge for the bolts alone.
Matt
KM5VI
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of K8RI
Sent: Tuesday, June 25, 2013 7:10 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] FW: FW: UST bolt Torque question
On 6/25/2013 7:37 PM, Grant Saviers wrote:
> Great to have some technical specs for "snug tight". Thanks.
>
> A hammer struck spud wrench? I would think the spec means a typical
> tapered spud wrench about 18" long for a 1" bolt. I'd estimate
> ironworkers I've met can (easily - no insult intended) apply 80 to
> 100# force to a wrench so torques in the 100 to 150 ft-lb range might
> be a numerical range for "snug tight". IIRC the ironworkers that
> erected my steel building had a 250 ft-lb target for 3/4" A325 bolts,
> thus I assume they are "slip critical" joints. (They used a big torque
wrench).
>
Just don't confuse the two technically precise terms of "snug tight" and
"hand tight" unless tightened by technically certified bolt tighteners/ Iron
workers.
73
Roger (K8RI)
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