Which aspect limits the selection of scales for any given brick?

The joint width plays a crucial role in limiting the selection of scales for brickwork. This is because the scale of the mortar joint affects the overall appearance and aesthetic of the masonry structure. A wider joint may require a different scale of brick to maintain visual balance and harmony, while a narrower joint may allow for smaller-scale bricks to be visually effective.

Joint width also influences the structural integrity and the way bricks interlock, which can impact the choice of patterns or styles used in the construction. In practice, ensuring that the scale of bricks aligns with the joint width helps achieve a cohesive look and function in the masonry work.

While aspects like brick color, texture, and mortar type are important in the overall selection and application of bricks, it is the joint width that directly limits the possible scales, as it defines the spacing and interaction between the bricks, thereby affecting their visual perception and structural performance.