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RE: Cracked Concrete?[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Cracked Concrete?
- From: "Joe Venuti" <jovenengr(--nospam--at)verizon.net>
- Date: Thu, 25 Feb 2010 12:16:02 -0800
The inspector tripped over the bolt and it moved………..
Sitting under my desk as I write this is an epoxy all
thread bolt 1" diameter with 10" embedment. It pulled out from
concrete under a static load that was markedly lower than advertised.
There was no cone because there was little bond to the concrete. The
epoxy bonded well to the all thread. The problem was the prep of the
concrete. I am very cautious when it comes to epoxy bolts.
Date: Tue, 23 Feb 2010 21:10:02 -0800
I am looking at a submittal to replace 16 misplaced anchor bolts for a 38 ft diameter 16 ft tall bolted steel water tank in Seismic demand D area Old Zone 4 . The engineer submitted a epoxy anchorage of a 3/4" all thread rod with a 6" embedment for a 4500 lb tension only load in a grade beam 18"wide 24" deep with #5 stirrups @ 18"oc and 6 # 5 long bars inside the stirrups around the ring. (there are 26 of the 3/4" dia anchor bolts @ 4'7" oc spacing around the grade beam) They called out for the Simpson SET-EP epoxy and they used the anchor system calc software. now the question - The engineer did not select that the concrete was cracked. Should I consider this foundation grade beam an element that requires a cracked section anchor solution?
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