Originally Posted by sigep_nm
Remember someone smarter than all of us designed these things, and the probably went to school to learn whether it needs this or that to work
I don't know about "smarter than all of us". Engineers know what works on paper - not what works in reality and operational use. If you don't believe me just ask anybody in construction...
And I'm sure 4 inches of ice IN TWENTY SECONDS meets the definition of severe icing...