- Within filled hatchways and in addition to any open void within the hatch cover there is a void of average depth 150 mm measured down to the grain surface from the lowest part of the hatch cover or the top of the hatch side coaming, whichever is the lower.
- In a filled compartment, untrimmed, which is exempted from trimming outside the periphery of the hatchway by the provisions of grain code , it shall be assumed that the surface of the grain after loading will slope into the void space underdeck, in all directions, at an angle of 30° to the horizontal from the edge of the opening which establishes the void.
