When evaluating bamboo ladders, the material maturity is paramount; ensure the bamboo used is 3-5 years old to guarantee optimal density and strength. For structural integrity, check that the rungs are mortise-and-tenon joined rather than just nailed or glued. The surface must be treated with a UV-resistant and anti-fungal coating to prevent cracking and mold, especially for outdoor or bathroom use. Additionally, verify the load-bearing capacity, which should typically be at least 100kg to 150kg for functional ladders.