FIELD: packing materials. SUBSTANCE: invention relates to packing materials, particularly, to corrugated sheet material used in packing of heavy loads, such as large metal reels or coils or stacks of rectangular metal sheets. Proposed protective packing sheet 1 has front and rear surfaces with repeating patterns on at least one them, formed by shaped projections 5 and adjacent formed projections to provide space around each formed projection. Projections 5 pass from at least one of sheet surfaces and they are arranged so that all straight lines projected onto surface of sheet intersect shaped projections 5 in addition to spaces. Sheet is light weight, features strength at compression and resistance at impact and bending. EFFECT: improved mechanical properties of sheet. 12 cl, 9 dwg
