Concrete anchor

[bgoo]

I am trying to select a concrete anchor to hang a post (hanging vertically downward). The post have a square flange on the top with mounting hole. My attempt is to use a heavy bolt to fix the post to the ceiling. I have done a dynamic analysis, it shows the resonance frequency is in the neighbourhood of 400 Hz, which is within the vibration test range. The dynamic force is about 2000 lb (share by 4 bolts), with the static load (weight) of 50 lb. I, then, used the concrete anchor datasheet and found a anchor which is 3/8 thread. The pull out strength is 5300 lb. Assuming the bolt itself can support the dynamic load. 3/8 threaded concrete anchor seems to be more than enough for the job. Can anyone confirm my result?

 

[jdonville]

bgoo,

You should probably post this in a structural forum - not soil mechanics.

Jeff