West Virginia Contractors License Practice Exam

The minimum diameter required for subsoil storm drains being 4 inches is based on industry standards that ensure proper drainage functionality. A 4-inch diameter effectively accommodates typical water flow from subsoil areas, reducing the risk of clogging and ensuring adequate performance in managing excess water. This size strikes a balance between being sufficiently large to handle stormwater runoff and being manageable for installation and maintenance. Larger diameters could lead to unnecessary costs and potential structural issues, while smaller diameters might not handle the flow effectively, leading to drainage problems. Thus, establishing 4 inches as the minimum helps to standardize construction practices and ensures that drainage systems function optimally in various hydrological conditions.