What is the maximum allowed size of stone for crushed stone used in a footing?

The correct size for crushed stone used in a footing is typically 3/4 inch. This size is optimal as it allows for adequate drainage and provides a stable base for concrete footings. Larger stones can create voids that may compromise the integrity of the footing, while smaller sizes may not provide sufficient support.

The 3/4 inch size strikes a balance, as it ensures good interlock and stability while being small enough to fill voids between the aggregate particles, leading to better load distribution. It also works well within concrete mixtures, preventing segregation during pouring.

Understanding this context is important for anyone involved in construction and structural design, as proper material selection plays a crucial role in ensuring the durability and safety of the built environment.