1. Weathertightness; 2. Durability; 3. Handiness; 4. Maintainability; 5. Competitive price; 6. First-rate service.
For cargo hold access on container carriers generally pontoon hatch covers are used. Pontoon type hatch covers are available as single or multi-panel units with non-sequential operation using flap sealing systems. Hatch cover panels are designed to accommodate higher container stack loads. Pontoon hatch covers have heavier container stack loads up to 90T/20' &140T/20' or 45', while the panel weight is limited by the capacity of the port crane. Non uniform load of container stacks in a very dynamic condition develops a very great downward force through a hatch cover.