Unverified82% confidenceFactTime unknown
标准L型金属托架的建议安装间距为40-60cm一个支撑，长度120cm的搁板通常需要3个托架才能避免中间下沉
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82%
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Unverified搁板长度超过60cm时，中间跨度过大易在承重后下垂，需增加中间支撑点或选用厚度≥25mm的板材，金属搁板还需注意板材回弹形变83% similarUnverified隐藏搁板的悬挑力矩随长度增加而放大，同样承重下60cm搁板比30cm搁板对螺栓的拉拔力大一倍，长度>80cm时建议至少3个固定点且板厚≥30mm，否则中部易下垂83% similarUnverified顶天立地式伸缩杆搁架的锁定长度必须留5-10cm余量：标称范围200-300cm的产品，实际稳固区间在210-290cm，接近极限值时管壁咬合变浅极易松脱坠落82% similarUnverified站立操作选总长110-130cm伸缩杆，杆径≥22mm且带内置卡扣锁定，避免用力时缩杆82% similarUnverified天幕主杆直径≥28mm（铝合金）才能稳定支撑大型天幕，直径25mm及以下仅适合3×3m以下小型天幕或作为副杆使用81% similar
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