Before commencement of loading, 3"x3" dunnage in cross section should be laid in athwartships lines across the tank top plating. The space between the lines of dunnage fore and aft, should be about 3 m. This pattern of dunnage should be separated between every tier, in order to bind the stow together and to allow re-slinging for discharge. The dunnage should be kept in line vertically. Every effort should be made to have beams with their webs placed vertically in stow