Pressure resistance (load capacity) is important for the septic tank manhole lid. Human load (for pedestrians) = 250k display pressure resistance 1t (old standard t-0.9 car prohibitor); Garage = 500k display; Pressure resistant to 2 tons (possible up to older T-2 2t vehicles); When you purchase this item, the same pressure (load capacity), it is okay to be used in the garage for one box cars such as Toyota, Nissan, etc. It is resistant to being used in conditions Exceeds pressure (load capacity). In that case, we recommend 1,000k display pressure resistance 4t.