Structural element

A structural element having a main body constructed of a single foldable blank, the blank being divided, along a first axis, at least into successive mutually foldable segments, namely four adjacent segments, designated side wall segments, and two end segments, each designated end flap, the main body being shaped as a rectangular cuboid and comprising:

• four side walls, formed from said side wall segments, and
• a partition, formed from said two end flaps, abutting each other;
• wherein said partition is disposed within said cuboid, diagonally to said side walls and extending between mutually opposite edges of the cuboid;
• wherein each end flap includes at least one notch and the blank further includes at least one side flap, foldable so that each notch in the end flaps, forming the partition, may embrace one or two corresponding side flaps;
• wherein said at least one side flap is a pair of side flaps, formed on one side of the blank so that when folded and embraced by a corresponding notch, a part of a first side flap in the pair may abut part of the second side flap;
• and
• wherein another part of said first side flap and another part of said second side flap, when folded, jointly form a complete end wall of the main body.