When breaching a masonry wall, what shape should the hole be cut?

When breaching a masonry wall, cutting a diamond-shaped hole is effective for several reasons. This shape allows for the structural integrity of the remaining wall to be maintained, as it creates a point of strength at the corners of the diamond that helps to distribute the load more evenly than other shapes. The diamond shape also facilitates easier access and maneuverability for firefighters who may need to enter through the opening or pass equipment through. It provides sufficient width and height for operations without compromising the overall stability of the surrounding wall. Additionally, the angles of a diamond can help guide debris away from the opening, improving visibility and safety for personnel.

In contrast, while a square or rectangular shape might seem practical, these shapes could lead to unnecessary stress concentrations on the edges, potentially causing the block to crack in an uncontrolled manner. A circular shape, although useful in certain contexts, does not provide as effective of an approach for breaching masonry walls where the aim is to maximize strength and structural resilience.