The footing for a masonry chimney should extend at least _____ inches beyond the face of the fireplace or foundation wall on all sides.

The correct response is based on established building practices regarding masonry chimneys. For structural stability and to ensure that the chimney can support its own weight, the footing must adequately extend beyond the chimney's footprint. Extending at least 6 inches beyond the face of the fireplace or foundation wall on all sides provides a solid foundation while allowing for proper weight distribution and minimizing the risk of settling or shifting over time.

This extension is crucial because it helps prevent cracking or structural issues that might arise from inadequate support, especially considering the weight of masonry materials. The extension also provides a measure of protection against any potential water intrusion by directing rainwater away from the chimney structure.