![]() The tradition in proper construction where excavation equipment was present was to excavate large holes and build a wooden form below the frost depth to pour footings to receive concrete columns.īig foot, developed in Nova Scotia, is a tapered cone, sized on the top to perfectly fit various diameter SonoTubes. ![]() Whatever happened to the TV show Father Knows Best? They don't meet any building codes and technically should only be used for free-standing structures that fall outside the building code, like a garden gazebo, but my son built his deck with them anyway. The popular DIY deck blocks, fondly called elephant feet, rely on exceptional soil conditions to not sink with a load-or rise with frost-and they have no hold down capacity against wind uplift, although the wind effect can be countered by cabling the deck beams down to screw auger type of ground anchors. The most commonly sold deck support does none of these things. And, a somewhat new factor in Canadian weather, it needs to resist wind uplift from extreme weather-meaning it needs to be anchored down. It should resist frost upheave both by having the footings below the frost line and in clay soils that are susceptible to adfreezing, minimizing ice lens adhesion. ![]() What is a deck foundation supposed to do? It should support the load without sinking and that requires footings.
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