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Re: L-shaped Anchors

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I can't provide documention, but a fellow in the office was attending a seminar years ago and the speaker talked about a case where wind loads on a column for a building under construction wasn't braced properly. The wind worked the anchor bolts loose by "pulling around the corner" so the column toppled over one night.

On 5/3/2013 5:35 AM, Paul Ransom wrote:
This leads into a question that I ask every time the topic comes up:

Does anybody have any first hand knowledge or are they aware of a
documented failure that was initiated at the anchors? Harold previously
described, as an example, a pressurised vessel that relied on substantial
and sustained tension in the anchors. However, for more conventional
stick-frame structures, has anybody ever observed a failure due to pullout of bent rods? I would even accept a research report on bent anchor performance.

I like the one about the offset CG. That gives credibility to the installer who swears the anchors were straight when they left for lunch.

Regards

Paul Ransom, P.Eng.

From: Jim Getaz <jgetaz(--nospam--at)shockeyprecast.com>

Note that despite the sketch on ACI Appendix D, people frown on

Truncated 377 characters in the previous message to save energy.

--
*Drew Morris, PE*| /Project Engineer/
BBFM Engineers, Inc. <http://www.bbfm.com/>
510 L Street, Suite 200 | Anchorage, Alaska 99501
Ph: (907)274-2236 | Fax: (907)274-2520 | Web: www.bbfm.com

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