We know that the metal roofing tests and standards an architect must include in a project specification can sometimes be confusing.
For example, we see some architects — and particularly designers new to the profession— specifying ASTM E 1592 for a plywood or B-Deck and B-Deck with ISO when, in fact, 1592 is the test method for structural performance of a metal roof for open framing such as a purlin application.