Final answer:
Chimney Footings Construction must be made of concrete or solid masonry, and their thickness must meet local building codes, which often require a minimum of 12 inches. These standards ensure the chimney's stability and efficiency, alongside the usage of efficient wood stoves or similar devices.
Step-by-step explanation:
The question revolves around construction standards for the footings of masonry chimneys. These footings provide a stable base and must be constructed with certain specifications to ensure the chimney's effectiveness and safety. Generally, chimney footings should be made of concrete or solid masonry and adhere to specific thickness requirements to properly support the structure above.
Although the exact thickness is not given in the question, it's essential to follow local building codes which often specify minimum dimensions. For example, codes may require the footing to be at least 12 inches thick, but this can vary by location and the size of the chimney.
Also, the use of an efficient wood stove or device can help prevent heat loss through the chimney, emphasizing the importance of both efficient and structurally sound chimney construction.