What limitation applies to the stacking of brick?

The correct answer highlights an important safety standard concerning the stacking of brick. When bricks are stacked, maintaining a height limit of seven feet is critical to preventing stability issues that could lead to accidents or injuries on a construction site. Stack height regulation is designed to ensure that the bricks do not topple over due to a higher center of gravity or improper weight distribution.

This limit is also related to the handling and accessibility of the bricks for workers, as excessive height can make it difficult to retrieve materials safely. Ensuring that brick stacks do not exceed seven feet allows for better visibility and reduces the risk associated with handling material at heights.

In contrast, the idea that bricks can be stacked as high as desired with no taper poses significant safety risks, as a tower of bricks without any taper may easily collapse. The notion of maintaining a minimum gap between stacks would not apply in this context, as the regulation focuses specifically on height rather than spacing. Lastly, while it may be beneficial for some operational reasons to stack bricks in a square formation, it is not a universal requirement for safety and does not directly address the important concern of stack height limitations.