Parking Structure & Parking Lot Trench Drains

Typically C250 to F900, depending on traffic and site configuration.

• Light-duty parking lots: C250 for passenger vehicles and small trucks.

• Commercial garages and ramps: D400–E600 for consistent vehicular traffic.

• Bus terminals, freight, or emergency vehicle access: E600–F900 heavy-duty rating.

Each drainage system must resist wheel loads, vibration, and structural movement.

Parking applications involve exposure to salts, fuels, oils, and freeze-thaw cycles.

• Fiber-Reinforced Concrete (FRC) or Polymer Concrete channels for high compressive strength and minimal deflection.

• HDPE channels for lightweight retrofit or secondary areas.

• Ductile-iron grates in drive lanes and traffic zones.

• Galvanized or stainless steel edge rails for impact resistance and corrosion protection.

• Epoxy or resin coatings for high-chloride environments such as parking decks.

• Outdoor lots require systems with sufficient hydraulic capacity for heavy rainfall events.

• Parking decks must use watertight trench drains to prevent leakage through structural slabs.

• Expansion joints and flexible sealants accommodate temperature and movement stresses.

• Slabs should be pitched 1–2% toward drains for efficient runoff.

• Systems must integrate with catch basins or stormwater management infrastructure.

• Safety: Slip-resistant, ADA-compliant grates to prevent pedestrian hazards.

• Durability: Handle repeated wheel loading without edge damage or grate rattle.

• Chemical resistance: Protect against oil, salt, and fuel exposure.

• Ease of maintenance: Modular channels with removable grates for quick cleaning.

• Longevity: Engineered to preserve structural integrity and pavement life.