There is nothing about fire extinguishers in 1910.178 for general industry and I have not seen a letter of interpretation on it either. We have a neat program from JJ Keller that shows all the states with variations on the forklift standard and gives the detail on them with web site links, I use it frequently when going to states such as MI, CA and several others that have unique requirements. I see you are from OH, who do you work for, just curious, it is always good to know other trainers in the same state. We are looking for a trainer in Toledo and Cleveland - any ideas of good people. My email is [email address removed]