Group 2 (minimum class B125, ultimate tensile strength > 125kn - 12,5 t.) For areas accessible only by very light vehicles, pedestrian areas, pavements, car parks, and multi-story car parks.
Plastic manholes are typically manufactured from polyethylene with a durable one-piece construction with no seams or seals that can cause maintenance issues. Similarly to fiberglass manholes, polyethylene manholes are environmentally-friendly and do not pose a risk of contaminating the ground that they are placed in.
Conclusion
Convenience and Portability