How deep to frost line Calgary Alberta?

In Calgary, Alberta, the recommended depth for a frost line is 4 feet (1.22 meters) below the surface. This depth is based on historical data and engineering calculations that take into account the local climate and soil conditions. The frost line is the depth at which the ground stays frozen for an extended period during the winter months. By placing foundations and other structures deeper than the frost line, the risk of frost heave and other damage is reduced. Frost heave occurs when the ground freezes and expands, pushing the foundation of a structure upwards. This can cause significant structural damage and is a common problem in areas with cold climates.