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Re: [SEAOC] Tiltup Retrofit Anchors[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Re: [SEAOC] Tiltup Retrofit Anchors
- From: terry2(--nospam--at)pumpkin.cdepot.net (Terry Weatherby)
- Date: Fri, 23 Feb 1996 11:40:32 -0800
>Dennis Wish PE wrote: >I concur with Tom Honles assessment of expansion anchors, although the >Tilt-up committee had taken a position on "under-cut" anchors and felt >that these would be perferable to expansion anchors. The Under-cut >anchor, though, requires a special bit since the end of the hole is >widened (bell shaped) to gain a greater hold with less tension against >the sides. >I perfer, and always have - especially with retrofit into poorer grades >of concrete - to use the Hilti Hit anchor system with their C-100 epoxy >adhesive for solid based materials. Covert Anchor uses a similar >adhesive as does a typical SAE 1018 threaded rod and the Simpson >"Epoxy-Tie" adhesive system. >Hope this helps. I have found recently that DSA/SSS and OSHPD do not allow this type of epoxy attachment system due to a lack of "long-term durability testing". We were forced to go to sleeve and/or expansion anchors on recent hospital jobs because of that "lack" of testing. I'd be curious if anyone else ran into similar design challenges. - Terry Weatherby ...
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