North Carolina Building Contractor License Practice Exam

What is the proper measurement for the maximum slope for filling?

1. 2 feet

2. 4 feet

3. 6 feet

4. 8 feet

The correct answer is: 4 feet

The maximum slope for filling in construction practices is typically established for safety and stability, particularly in terms of ensuring that the embankment or fill does not become overly steep, which could lead to erosion, slippage, or failure of the fill material. A measurement of 4 feet for the maximum slope means that for every foot of vertical height, the slope should extend 4 feet horizontally. This results in a gradient that is generally considered safe and allows for stability while minimizing the risk of collapse or instability over time. This standard is often utilized in various engineering guidelines, including those related to soil mechanics and grading without compromising the integrity of the fill. Other measurements, such as 2 feet or 6 feet, do not adhere to the typical standards used to determine the safety and engineering principles behind slopes for fills. A 2-foot slope would create a steeper incline than is advisable, which could lead to instability, while a 6-foot slope may be more gradual, but it is less common as a maximum standard in controlled construction environments. The key is ensuring that the fill remains stable and adheres to accepted engineering practices, which is why 4 feet is recognized as a suitable maximum slope.