All 12" Width Grates Home » Products » Trench Drains » Trench Drain Grates » 12" Width Grates All 12″ Grate Option Specification Sheets 12" Width Grates Subcategories Load Class C: EN 1433 - 56,200 LBS., 250kN, 1160 PSI Load Class E: EN 1433 - 134,800 LBS., 600kN, 2785 PSI Load Class F: EN 1433 - 202, 320 lbs., 900kN, 4,177 PSI