| Clear openning | Load resistance | Cover securing within the frame | Type of frame | Cushioning system | Ergonomics | 
| Ø28″ | 130,000 lbs | hinge + mass | Ø37″ L shape frame | Elastomer | Hinge openning | 
28-inch PAMTIGHT 130,000 lbs load | manhole cover featuring double joint system with sound-proof and elastomer tightness options. Ideal for occasional inspection access.