What is the minimum bearing requirement for the ends of each joist on wood or metal?

The minimum bearing requirement for the ends of each joist on wood or metal is 1-1/2 inches. This requirement is established to ensure sufficient support and structural integrity for the loads that will be transmitted through the joists. Adequately bearing the ends of the joists helps to prevent issues such as bending and shear failure that can occur if the ends are not sufficiently anchored.

Having a bearing surface of 1-1/2 inches allows for a secure fit, providing the necessary contact area to support the load and distribute forces effectively across the supporting elements, such as beams or walls. This bearing requirement can also aid in accommodating any potential movement or shrinkage of the wood due to changes in moisture content over time, thereby maintaining the overall strength and stability of the structure.

Additionally, this dimension aligns with building codes and industry standards for construction practices, ensuring safety and compliance throughout the structure.