High-strength tubular beam of folded corrugated cardboard

摘要: A high-strength tubular beam of folded corrugated cardboard, for example constructing disposable load-carrying platforms, comprising a single cardboard sheet (1) back several times on itself to form an overall section right angled or isosceles trapezium (4, 6', 8', 8, 6), divided into two adjacent rectangular half sections (4,6', 18'), 6, 18), each mutually inverted triangular channel configurations (16', 14', 12') - (8', 10', 12'), (10, 12) (16, 14, 12), which mate with other and have common diagonal (12, 12').