i need to know if there is a UL rating for brick veneer over drywall and metal stud backup. i have an application where there are two layers of brick veneer, one each side with a 6" metal stud and exterior drywall inner width. i need a two hour rating. i am told by the construction managers that there is no rating for this assembly. doesn't seem right to me. if you have any information, please forward to fredfrank@spenceconst.com. thank you.