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Rock Solid Pile Driving in Anchorage, Alaska drives 2-6 inch steel pipe piling for deck, dock, cabin and shed foundations. Municipally approved and more economical than a traditional sonotube, Rock Solid’s piles are typically driven 15-25 feet into the ground, well below the frost level. Rock Solid’s steel pile foundations are your best defense against frost heaving that can damage your deck and home.