I don’t think it says in the article, but I’m assuming these tests referenced by the Mass Gov. were done after the collapse. What a shame this wasn’t discovered during construction.
I will think twice about specifying epoxy anchors in direct tension situations until I hear the cause of these problems. Sorry Hilti.
Most of these anchors are governed by a safety factor of 4, and some use 8 without special inspection. They still fell! That's pretty bad. There's something to be said for properly cleaning those holes. I wonder what the actual cause was.
I spoke with a Hilti rep today and asked him if Hilti was involved in any way. He said that they are investigating but I got the impression that it wasn't their bolts. He indicated that the little red cone on the bolt was not something he'd seen before and was doing a web search to find out who's it was.
He stated that at some point Hilti was going to issue some sort of statement.
