HEY, I totally wasn't thinking about the type of cooker your using - please don't use anything galvanized, for some reason i was thinking about under a diamond plate to catch the ashes and small coals! sorry for the mis info and even though i have seen galv. metal used in various ways through the years, like over a pit in the ground, i would be very careful about it due to the toxins it gives off! In most cases regular steel is not only safe but it will last a long time like cast iron! sorry for the wrong response! PAT