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C Henderson的折叠门技术说明将上吊式与下承重式明确区分：前者由上部轨道中的吊轮支承门扇，后者主要通过底部轨道和滚轮承重。因此，对已有门应查五金系统型号、安装图和承重说明，不能看到上轨就认定整门悬挂，也不能看到下轨就认定门重全部落在地面。\u003C\u002Fp>\n\u003Cp>\u003Cimg src=\"https:\u002F\u002Fimg.shenzhenjianzhong.com\u002Fpublished\u002Fmedia\u002Fagent-articles\u002F529\u002F20261014\u002F179196698300224602\u002Farticle-529-c99182751f45f275.webp\" alt=\"上吊式和下承重式的主要荷载传递路径示意\" loading=\"lazy\" \u002F>\u003C\u002Fp>\n\u003Cp>上吊式与下承重式的主要门重传递路径不同。箭头表示传递关系，不是门扇运动方向。\u003C\u002Fp>\n\u003Ch2>上吊式：上轨能装上，不等于上方结构能承重\u003C\u002Fh2>\n\u003Cp>上吊式的荷载需要经吊轮、轨道及其连接，传给具有相应支承能力的上部结构。选型时，应由安装和结构专业人员核对上方支承条件及固定方案。装饰包板、吊顶外观或轨道本身的产品承重数据，都不能单独证明现场安装部位满足要求。\u003C\u002Fp>\n\u003Cp>这种结构可以减少对底部承重轨道的依赖，但\u003Cstrong>“上吊”不自动等于“无下导向”\u003C\u002Fstrong>。部分室内折叠门系统采用无底部导槽设计，例如Roomflex 40；这来自成套设计，不能据此拆掉其他型号原配的下导向件。若目标是让通道底部更平整，应在选型时确认具体系统的门槛与导向方案，而不是装好后删减部件。\u003C\u002Fp>\n\u003Cp>\u003Cimg src=\"https:\u002F\u002Fimg.shenzhenjianzhong.com\u002Fpublished\u002Fmedia\u002Fagent-articles\u002F529\u002F20261014\u002F179196709109418245\u002Farticle-529-dfe668980040ef8b.webp\" alt=\"原配下导向与专门无下导槽折叠门系统的概念对比\" loading=\"lazy\" \u002F>\u003C\u002Fp>\n\u003Cp>是否需要下导向由成套结构决定；无下导槽设计不能靠拆除其他型号的原配部件实现。\u003C\u002Fp>\n\u003Ch2>下承重式：减轻上部承重要求，仍要核对下轨基础\u003C\u002Fh2>\n\u003Cp>下承重式适用于需要将主要门重传向下方的方案。上方不再承担与上吊式相同的主要竖向门重，但门框、导向及连接仍须按该型号完整安装，不能理解为上方结构可以不固定。\u003C\u002Fp>\n\u003Cp>下轨的安装基面和平整情况会影响门扇运行。轨道内积聚砂粒、碎屑，也可能干扰滚轮通过。因此，选择这种方案时，除了比较五金，还要核对下轨位置、支承与日常清理条件。表面看起来平整的地面，并不能代替对实际固定和支承部位的确认。\u003C\u002Fp>\n\u003Ch2>先确认整套方案，再比较开启体验\u003C\u002Fh2>\n\u003Cp>两种方案都需要把门扇材料、每扇重量和尺寸、扇数、折叠方向及室内外环境交给供应方核对。产品标注的最大门重还要看其统计口径与适用配置，不能混淆单扇与整组的承重限值，也不能自行增加几个轮子就推算可以承载更重的门。\u003C\u002Fp>\n\u003Cp>上吊式重点确认上部支承，下承重式重点确认下轨支承和运行条件；两者都要核对导向、连接和成套五金。对已经出现明显下垂、连接松动、门扇脱离导向或卡阻加重的折叠门，应先停止使用并安排检查，不要反复强推，也不要在没有支承保护的情况下拆卸吊轮、轴件或合页。\u003C\u002Fp>\n\u003Cp>确认承重路径及现场支承条件后，再比较门槛形式、操作便利性和维护条件。\u003C\u002Fp>\n\u003Cp>资料来源：P C Henderson，Top Hung vs Bottom Rolling Bifold Doors: Things to Consider，2024年10月30日；P C Henderson，FAQs及Roomflex 40产品资料。资料核对日期：2026年10月14日。本文讨论常见手动折叠门的选型原理，不替代具体型号安装图或结构设计；插图为原理示意。\u003C\u002Fp>\n",[],"建中说门道","P C Henderson技术资料","折叠门上吊式与下承重式怎么选？承重和导向的区别","折叠门,上吊式折叠门,下承重式折叠门,吊轮,导向","比较折叠门上吊式与下承重式的承重路径，说明上部支承、下轨基础、导向部件和五金成套配置的选型边界。",{"id":36,"name":46,"slug":348},{"title":361,"slug":362},"舟山普陀架空层充停场所改造基本完成，配套加装防火卷帘","putuo-stilt-floor-charging-fire-shutter-upgrade-2026",{"title":364,"slug":365},"快速门地感能识别叉车，就能保护行人吗？","rapid-door-inductive-loop-pedestrian-safety",[367],{"id":207,"title":37,"subtitle":368,"image":369,"mobileImage":16,"link":16},"行业动态 · 技术问答 · 产品FAQ","https:\u002F\u002Fwww.shenzhenjianzhong.com\u002Fsecurity-assets\u002F5085ba7fa31941f0ae59e7a8db089907e86b3d1e921787ea3e7e8ff1a14d84e7.jpg"]