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RE: Large anchor bolt tightening spec.s

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ASCE "Guidelines for Seismic Evaluation & Design of Petrochemical
Facilities".  Don't use torque, use a hydraulic tensioner like Biach.

Regards,
Harold Sprague

> -----Original Message-----
> From:	Paul Pilarski [SMTP:PPilarski(--nospam--at)HNTB.com]
> Sent:	Wednesday, February 28, 2001 10:48 AM
> To:	'seaint(--nospam--at)seaint.org'
> Subject:	Large anchor bolt tightening spec.s
> 
> Does anyone know recommended tightening values (tension and/or torque) for
> a
> 3" dia A449 anchor bolts? Most references list snug tight values to 1-1/2"
> dia bolts, and state that "snug tight" is not less than 15% of yield.
> However, for an anchor bolt just getting to this theoretical snug tight
> value seems incredibly large.  Any recommendations/references?
> 
> TIA.
> 
> Paul Pilarski, EIT
>