Has us in some places putting condensing units 12 feet or higher in the air depending on the flood plane. Some people at FEMA years ago got together and decided keeping the condenser dry was more important than a persons safety.
There are no standards for building the stand and I have seen many that shake, rot and are unsafe from the day they were made. I have seen 3 to 4 condensers on them side by side and are big as 5 ton's each. There are no mandatory guidelines in building them, no clearances for standing or rails. One service call you can be on the ground working then the next 15 feet in the air. It is easy while troubleshooting to forget you are that high up. I have never thought keeping these units dry was worth the risk of hurting someone. These stands that are getting older are at risk of falling. Just working on one that high up is another safety problem. Wonder why OSHA doesn't fine FEMA?