I'm building a new deck and got my plans approved for the city. In order to reduce the point load from a beam meeting on the corner of the house, the inspector asked that I use a double ledger board and move the footing closer to the foundation. How do I attach a double ledger? Do I attach one with galvanized lag screws to the rim joist, and then attach the other ledger to that, or should I just put galvanized lag screws through both ledgers at once into the rim joist? Also, Menards and Home Depot sell mostly "galvanized 1/2" lag screws", but the code calls for "hot dipped galvanized". Can someone explain the difference? Are the galvanized they're selling at the hardware stores really hot dipped galvanized and they're just shortening the name, or is it something else?