So I head down to Home Depot to pick up some 7/16" LP SmartSide T1-11 paneling that I'd hoped to use as structure+siding on a shed. The store only has the 3/8" variety (can't be used as structural). In 7/16, they have something called LP ABT Siding, which looks just like the SmartSide panels but appaers to be particle board-like instead of OSB. I've googled hoping to find more information on it and there's hardly anything out there talking about, much less explaining what it is. But here's the kicker...went to another Home Depot and a Lowes and all had the same thing. What is this stuff and should I even consider using it? It claims to be weather resistant. They carry SmartSide in 3/8. Don't understand why for 7/16 the have this other mystery product. Anyone know something about this product?