I do not understand the basis for the ruling since my understanding is that these alternate supposedly “equivalent” coatings are not listed in the IBC.
Dietrich has been noted as being litigious. The metal stud market is apparently very competitive.
OSHPD, the agency regulating hospitals in California, cannot require and ICC ESR report but what is done may differ from can.
Mark, to an extent you are right, they are not directly listed in the IBC … however, they are incorporated by reference.
The IBC references AISI S220 for non-structural steel studs. (IBC 2015, 2211.1)
AISI S220 A5.1 states, “Nonstructural members utilized in cold-formed steel framed construction shall have a protective coating conforming to ASTM A653/A653M G40 minimum or shall have a protective coating with an equivalent corrosion resistance.” (https://www.steel.org/~/media/Files/SMDI/Construction/CFSD%20-%20Pub%20-%20S%20220-11%20-%20Standard%20for%20Nonstructural%20Mbrs%20Final.pdf?la=en)
All ClarkDietrich needs is to show that their EQ coating provides an equivalent corrosion resistance, which they have done. Apparently the jury in Ohio agrees.