What do red numbers on the oversize brick spacing scale indicate?

Red numbers on the oversize brick spacing scale indicate the quantity of intervals from the end of the rule. This feature is essential for bricklaying because it helps masons accurately measure and space out their brick placements quickly and efficiently. By using these markings, a mason can determine how many intervals are present, allowing for precise planning of the layout of bricks, especially in cases where uniformity and aesthetics are critical, such as in walls or decorative structures.

The specific use of red numbers makes it easy to identify and reference during the brick-laying process, ensuring that the correct distances between bricks or courses are maintained in compliance with design specifications or structural requirements.