How much support is required for floor joists into footing?

The requirement of a minimum of 1.5 inches of support for floor joists into the footing is based on structural integrity and building regulations. This depth is essential to ensure that the joists are properly anchored, providing stability and load-bearing capacity. The 1.5 inches allows for sufficient embedment into the footing to prevent lateral movement and to support the weight of the structure above.

Proper support helps to manage any potential movement that might occur due to changing moisture levels, temperature fluctuations, or the natural settling of soil. By adhering to this minimum support requirement, builders can enhance the overall durability and safety of the construction. This standard is typically derived from industry practices and relevant building codes aimed at ensuring residential buildings are both safe and long-lasting.