In a slope ratio, what does the first number represent?

In a slope ratio, the first number represents the horizontal distance, which is often referred to as the "run." A slope ratio is typically expressed as a comparison of vertical distance to horizontal distance, such as 1:3. In this context, the first number indicates how much horizontal distance is covered for every unit of vertical rise.

Understanding this is crucial for applications in construction and excavation work, as it helps in setting up safe slopes for earthwork or trenching, ensuring stability and compliance with safety standards. The relationship between the vertical rise and the horizontal run aids in planning and executing tasks that involve sloped surfaces, such as ramps, ditches, or embankments.