Anchor bolts with "not full" thread engagment
Anchor bolts with "not full" thread engagment
(OP)
Can anyone see any issues with calculating the thread capacity of a anchor bolt nut that is not fully engaged and comparing it to the applied load to determine if it is acceptable?
The anchors are 1" diameter Red Head anchors and are oversized for the loads they will see (approximately a 3:1 ratio of allowable concrete breakout capacity to applied load). The engagement is a little above one half the nut and the thread capacity is higher than the conrete breakout. Installing a coupler is not possible and I doubt that the bolt material is conducive to welding.
The anchors are 1" diameter Red Head anchors and are oversized for the loads they will see (approximately a 3:1 ratio of allowable concrete breakout capacity to applied load). The engagement is a little above one half the nut and the thread capacity is higher than the conrete breakout. Installing a coupler is not possible and I doubt that the bolt material is conducive to welding.





RE: Anchor bolts with "not full" thread engagment
desertfox
RE: Anchor bolts with "not full" thread engagment
RE: Anchor bolts with "not full" thread engagment
www.FerrellEngineering.com
RE: Anchor bolts with "not full" thread engagment
Dik
RE: Anchor bolts with "not full" thread engagment
http://www.aisc.org/content.aspx?id=2168
On page 14 of the downloadable slides package, it details how to correct the anchor bolt too short condition.
I recommend checking it out and the solutions it recommends.
RE: Anchor bolts with "not full" thread engagment
Fegenbush, the link you provided to AISC recommended field fixes is very useful and it does suggest analysing the nut engagement as an option to dealing with short anchors. Thanks.
RE: Anchor bolts with "not full" thread engagment