Every state in town has different specifications of what is required on footing size!
FootingPad 10 in. Dia. x 1 in. Composite Post Foundation 121-102 - The Home DepotThanks -and which method is recommended? dry backfill or cement tubes? Just seems like a steel plate at the bottom of a hole would be equivlant to some plastic that is made from recycled plastic food containers critters eat.