All Load Class B: EN 1433 - 28,100 lbs., 125kN, 580 PSI Home » Products » Trench Drains » Trench Drain Grates » 4" Width Grates » Load Class B: EN 1433 - 28,100 lbs., 125kN, 580 PSI T100-PGB-13-LS Galvanized Longitudinal Grate T100-PGB-3-WW SS Longitudinal Grate