Fire Damaged Anchor Bolts
Fire Damaged Anchor Bolts
(OP)
I have a town home project that was burned down by an arson after it was fully framed. I haven't been to the site yet but I know that they are going to ask. They will want to know if the anchor bolts are going to be salvagable. What issues would you expect from bolts that have been in a residential fire? I wouldn't imagine that the heat was very great, or at least not hot enough to alter the steel properties. I would guess that the bolts would be okay
Any thoughts/ideas/help would be appreciated.
Any thoughts/ideas/help would be appreciated.





RE: Fire Damaged Anchor Bolts
Once you know the answers to the above questions, there are tests that can be performed to evaluate if the bolts have been altered as a result of exposure from the fire.
If I am asking these questions, you can bet an insurance investigator will ask them. I have been through these type of investigations on industrial equipment fires and explosions.
RE: Fire Damaged Anchor Bolts
-The bolts only got warm, no harm at all.
-The bolts got hot, but not real hot. This would temper them to a lower strength level, but all in all the properties wouldn't be bad.
-The bolts got real hot re-annealing or normalizing them. they will be weak and you don't know what the properties are.
-The bolts got real hot and they were cooled quickly as they were fighting the fire. They bolts could end up (depending on chemistry)hard and brittle.
Find the original spec a bolt. Have hardness tests done on all of them. If there is a lot of scatter I would lean toward cutting them all of and drilling and grouting new bolts.
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RE: Fire Damaged Anchor Bolts
Regards,
Cory
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RE: Fire Damaged Anchor Bolts
Again, thanks for your help.