Architectural Freak To the Editor: Bow House manufactures a reproduction of an old bowed-roof cape. With the present codes, our decisions are made with design as the prime consideration. According to your article, "Codes Okay Wider Doors, Longer Stairs" (Eight-Penny News, 1/92), the Building Officials and Code Administrators are proposing that states adopt a 7-11 rule for stairs. This will work a hardship on us. Our stairs barely fit under the present codes. The change will push the stairs about three feet beyond the centerline of the house. This doesn't sound like much, but everything around the stairs will have to change. The 7-11 rule will create an architectural freak in what is trying to be a New England Colonial reproduction. What