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RE: Epoxy Anchor

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Both the HSL and the KWIK BOLT II have been listed by ICBO ES for
seismic loading.  See latest versions of ER #4627 and ER #3987.  Contact
Hilti at 1-800-879-8000 for current copies.  
  	 

> ----------
> From: 	Lynn[SMTP:lhoward(--nospam--at)silcom.com]
> Reply To: 	seaint(--nospam--at)seaint.org
> Sent: 	Thursday, September 17, 1998 7:32 PM
> To: 	seaint(--nospam--at)seaint.org
> Subject: 	Re: Epoxy Anchor
> 
> We have just been through a similar issue with OSHPD on a hospital
> project.  Because epoxy anchors do indeed loose significant strength
> when
> heated, they should not be used to support any kind of gravity
> loading.
> If the anchors are just carrying seismic or wind loads, OSHPD (and I
> assume DSA) will in fact allow the use of epoxy anchors.
> 
> The problem with expansion bolt is that with the exception of the
> HILTI
> HSL anchors, none of the expansion type anchors have ICBO approved
> design
> values for seismic loads.  The HILTI HSL anchors are metric, made in
> Germany, and are very expensive.
> 
> OSHPD will in fact accept the HILTI KWIK BOLT II for use as seismic
> anchors if you use 80% of the ICBO number for gravity loads for shear
> or
> tension.  However, there could be a problem down the road when the new
> ICBO reports come out if the allowable shear and tension values are
> lower
> than what OSHPD is currently allowing.  Admittedly the chance of this
> happening is small.
> 
> In our case, we ended  up using epoxy anchors because all of our work
> involved anchors that only carried seismic anchors for floor mounted
> equipment.
> 
> Good Luck
> 
> Lynn
> 
> 
> 
> 
> James Lin wrote:
> 
> Project: Retrofit the existing concrete building (school job)
> 
> > Location: Southern California
> > DSA correction: Use drilled and grout anchor bolts (instead of Hilti
> > Hit HY150) to fasten new steel ledgers to existing concrete walls
> > (Since raised temperature during fire will reduce the bond strength
> of
> > epoxy anchors)
> >
> > We still like to use epoxy anchors for the following reasons
> > 1. better quality control (for installation) over drilled and grout
> > anchors
> > 2. less chance to cut the existing rebars
> >
> > Any opinion/suggestion to response to DSA (Department of State
> > Architect of California)?
> >
> > Thanks in advance
> >
> > James Lin, S.E.
> > I. D. S.
> >
> >
> 
> 
> 
>