Hardscape Permit Requirements by St. Louis Municipality
Whether a hardscape project needs a permit in the Greater St. Louis metro depends on which municipality the parcel sits in. Retaining walls show it most clearly: the permit trigger runs from 18 inches in the City of St. Louis to 6 feet in unincorporated Jefferson...
Missouri Soil Classification by County for Hardscape
Missouri soil classification is the system for identifying a soil by its measurable properties and sorting it into groups that predict how it will bear load, move water, and shift with frost. It works through two frames at once. The USDA soil survey names a soil...
Commercial Retaining Walls in St. Louis: Code and Permits
A commercial retaining wall carries more than soil. It holds back surcharge load, the added lateral force from parking areas, drive lanes, buildings, or graded slopes sitting above or behind it. That force is what separates a commercial wall from a backyard garden...
How to Design a Retaining Wall Drainage System That Prevents Failure
A retaining wall drainage system is the engineered network of aggregate, filter fabric, perforated pipe, and discharge outlet that intercepts water behind a wall and routes it away before it can build force against the structure. That force is hydrostatic pressure. It...
