Several concrete companies like Brooklin Concrete make "pads" to act like a foot, and disperse the weight of the deck over a larger area (square inches) rather than just the end size of the 4X4 or 6X6 post. As it is a floating deck, you don't need to sink your support posts in the ground to deal with frost heaves, so they made floating pads to give another option to DIY guys.skiierman said:what are "those floating concrete pads" ?