1. Versatile in function. Based on specific construction requirements, safe ladders can form a variety of single-row, double-row scaffolding, support frames, support columns, and material hoisting frames, serving multiple construction purposes. 2. Strong load-bearing capacity. The press-fitted pin storage has reliable axial shear resistance, with a large contact area between horizontal and vertical bars, resulting in overall stability and strength approximately 20% higher than that of bowl clamp scaffolding.