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碳素钢管+加粗管壁（壁厚≥0.8mm）的落地衣架承重性远高于同直径的薄壁管，选购时应关注管壁厚度而非仅看外径

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Unverified线材直径是承重的核心指标：管径≥1.0mm的碳钢管货架承重明显优于0.6-0.8mm的薄壁管，选购时优先看管壁厚度而非仅看标称承重91% similar Unverified钢管管径与壁厚决定承重：直径≥25mm、壁厚≥0.8mm的碳钢管单层可稳定承重15-20kg；壁厚＜0.6mm的薄壁管长期承重易弯曲，选购时可要求商家标注管径和壁厚87% similar Unverified碳钢管壁厚≥0.6mm且单层承重标称≥15kg的收纳架，才适合放置微波炉、锅具等重物；壁厚＜0.5mm的空心管长期承重会发生层板下弯变形82% similar Unverified承重立柱选择直径≥25mm的碳钢管（壁厚≥1.0mm），单杆挂衣承重可达30kg以上；直径19mm或以下的薄壁管长期挂重外套易在中部弯曲变形82% similar Unverified框架管径直接决定承重：钢管方管≥1.2mm壁厚、25mm以上截面才适合重载；壁厚＜0.8mm的薄壁管长期放重物易变形弯曲81% similar

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