Unverified80% confidenceDecision RuleTime unknown
钢管选方管优于圆管，方管抗扭曲变形能力更强；主承重管壁厚应≥2.0mm，管径50mm×50mm方管的稳定性明显好于40mm规格
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Unverified钢管壁厚≥2mm、方管（50x50mm或以上）比圆管抗扭性更好，主承重立柱应为方管；壁厚不足1.5mm的圆管在大重量下会晃动变形91% similarUnverified管材壁厚≥1.0mm且直径≥25mm的钢管抗弯性明显优于壁厚0.6mm的薄管，同样标称承重下薄管中间会下垂87% similarUnverified管径是稳定性关键：25mm以上不锈钢管管壁厚度≥1mm才能承受横臂力矩，铝合金架轻便但同管径承重比钢架低约30%86% similarUnverified钢管直径是承重关键，管径≥19mm（约6分管）比13mm细管抗弯性显著更强，选购时看管壁厚度≥0.6mm避免踩踏或压重变形86% similarUnverified管径决定稳定性：钢管选直径≥25mm、壁厚≥0.8mm，铝合金因材质软需≥28mm或加粗方管，管径低于22mm的伸缩架横向晃动明显、不适合挂载重物86% similar
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