I have completed a few installations in warehouses involving steel, etc. You will have multi-path and reflection issues. I recommend using a patch antenna and definitely performing an APoS survey to gain better understanding of how the RF will react with the antennas in the environment. Also mounting can be challenging, I've had success with using Ventev infrastructure for i-beam mounting and wall mounting along with NEMA rated enclosures to protect the access point. Cheers, -DC ... View more