{"id":3490,"date":"2026-08-11T00:03:25","date_gmt":"2026-08-11T00:03:25","guid":{"rendered":"https:\/\/www.zkhoist.com\/?p=3490"},"modified":"2026-08-11T00:46:48","modified_gmt":"2026-08-11T00:46:48","slug":"rigid-freestanding-bridge-crane-system","status":"publish","type":"post","link":"https:\/\/www.zkhoist.com\/fa\/rigid-freestanding-bridge-crane-system\/","title":{"rendered":"\u062c\u0631\u062b\u0642\u06cc\u0644 \u0633\u0642\u0641\u06cc \u0645\u0633\u062a\u0642\u0644 \u0635\u0644\u0628: \u0638\u0631\u0641\u06cc\u062a \u0628\u0627\u0644\u0627\u062a\u0631 \u0648 \u0645\u0648\u0642\u0639\u06cc\u062a\u200c\u06cc\u0627\u0628\u06cc \u062f\u0642\u06cc\u0642"},"content":{"rendered":"

A rigid freestanding bridge crane is a light-duty material handling system independently supported by floor-mounted columns. It does not rely on the building roof or existing structural columns to carry crane loads. Rigid runways, the bridge girder and travel trolleys form a complete rectangular working area, making the system suitable for machine loading and unloading, assembly, die changing, maintenance and material transfer between workstations.<\/p>\n\n\n\n

ZKHOIST can provide rigid single-girder or rigid double-girder solutions according to the load, span, runway length, lifting height, operating frequency and workshop layout. The rigid series covers capacities from 80 kg to 3 t for a wide range of workstation lifting requirements.<\/p>\n\n\n\n

\"Rigid
Rigid freestanding bridge crane installed in a production workshop.<\/figcaption><\/figure>\n\n\n\n

Product Specifications<\/h3>\n\n\n\n

The capacities below represent the overall coverage of the rigid freestanding bridge crane series. The rated capacity available for a specific project must be determined according to the span, bridge configuration, column spacing, attachment weight, operating frequency and floor conditions.<\/p>\n\n\n\n

    \n
  • Capacity: single girder, 80 kg-2 t; double girder, 125 kg-3 t<\/li>\n\n\n\n
  • Span: single girder, less than 10 m; double girder, engineered for larger spans<\/li>\n\n\n\n
  • Lifting height: customized according to the available headroom and lifting requirements<\/li>\n\n\n\n
  • Runway length: customized according to the required working-area length<\/li>\n\n\n\n
  • Installation: freestanding columns with floor anchoring, or a suspended arrangement where the building structure is suitable<\/li>\n<\/ul>\n\n\n\n

    Rigid Freestanding Bridge Crane Configurations<\/h2>\n\n\n\n

    Single-girder and double-girder cranes are two bridge configurations within the same rigid freestanding system. Selection should not be based on capacity alone; span, lifting attachment, load center of gravity, lifting height and operating frequency must also be considered.<\/p>\n\n\n\n

    When Should You Choose a Rigid Single-Girder Crane?<\/h3>\n\n\n\n
      \n
    • The load normally remains directly below the hook.<\/li>\n\n\n\n
    • The crane uses a standard hook, sling, clamp or compact lifting attachment.<\/li>\n\n\n\n
    • The required capacity is within the 80 kg-2 t range.<\/li>\n\n\n\n
    • The project needs stable travel, a straightforward structure and controlled investment cost.<\/li>\n<\/ul>\n\n\n\n

      When Should You Choose a Rigid Double-Girder Crane?<\/h3>\n\n\n\n
      \"Rigid
      Rigid double-girder bridge configuration and travel assemblies.<\/figcaption><\/figure>\n\n\n\n
        \n
      • The required capacity exceeds the single-girder range and may reach up to 3 t.<\/li>\n\n\n\n
      • The span is larger, or greater bridge stiffness and travel stability are required.<\/li>\n\n\n\n
      • The crane handles long loads, eccentric loads or workpieces with a changing center of gravity.<\/li>\n\n\n\n
      • A manipulator, vacuum lifter or another specialized end-effector is required.<\/li>\n\n\n\n
      • Positioning the lifting equipment between the two girders is preferred to improve the available lifting height.<\/li>\n<\/ul>\n\n\n\n

        Core Advantages of the Rigid Freestanding Bridge Crane<\/h2>\n\n\n\n

        This series uses an independent steel support structure and rigid steel truss tracks. Its defining benefits are structural rigidity, stable travel and positioning control, which are different from flexible track systems that use suspended connections to accommodate movement.<\/p>\n\n\n\n

        \"Rigid
        A rigid steel-truss bridge crane system installed over a machine-tool work area.<\/figcaption><\/figure>\n\n\n\n

        1. Rigid Truss Structure Helps Reduce Bridge Skewing and Binding<\/h3>\n\n\n\n

        The rigid steel truss runways and bridge girder provide high structural stiffness and maintain a stable geometric relationship between the travel assemblies on both sides. For larger spans, frequent operation or workstations requiring stable movement, this helps reduce bridge skewing, binding and unnecessary lateral motion.<\/p>\n\n\n\n

        2. Stable Load Movement Supports More Precise Positioning<\/h3>\n\n\n\n

        Rigid connections transfer the operator’s push or pull more directly to the bridge and hoist trolley, reducing the influence of structural movement. The system is suitable for assembly alignment, machine loading and unloading, die changing and operations that repeatedly stop at defined positions.<\/p>\n\n\n\n

        3. Floor-Supported Structure Does Not Use Building Roof Capacity<\/h3>\n\n\n\n

        Columns, support beams and longitudinal runways form an independent load-bearing structure. Crane loads are transferred to the floor through column base plates and anchoring systems. This arrangement is suitable when the roof has insufficient capacity, building modification is restricted, or pipes, ducts and production equipment occupy the overhead space.<\/p>\n\n\n\n

        4. Single- and Double-Girder Options Cover Different Loads and Spans<\/h3>\n\n\n\n

        The single-girder configuration offers a straightforward structure for conventional workstation handling. The double-girder configuration can serve higher capacities, larger spans, long or eccentric loads, and specialized equipment such as manipulators and vacuum lifting devices. Both configurations are engineered within the same rigid product series.<\/p>\n\n\n\n

        5. Modular Configuration Adapts to Production-Line Layouts<\/h3>\n\n\n\n

        Runways, bridge girders, columns, travel trolleys, lifting equipment and power-supply systems can be arranged around equipment positions, aisles and the required working area. The initial design can allow for runway extension, additional bridges or changes to the operating area; any later expansion must be checked against the load capacity of the original structure.<\/p>","protected":false},"excerpt":{"rendered":"A rigid freestanding bridge crane is a light-duty material handling system independently supported by floor-mounted columns. It does not rely on the building roof or existing structural columns to carry crane loads. Rigid runways, the bridge girder and travel trolleys form a complete rectangular working area, making the system suitable for machine loading and unloading, […]","protected":false},"author":5,"featured_media":3486,"parent":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[21],"tags":[126,127],"class_list":["post-3490","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-light-cranes","tag-freestanding-bridge-crane","tag-workstation-cranes"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/posts\/3490"}],"collection":[{"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/comments?post=3490"}],"version-history":[{"count":2,"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/posts\/3490\/revisions"}],"predecessor-version":[{"id":3531,"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/posts\/3490\/revisions\/3531"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/media\/3486"}],"wp:attachment":[{"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/media?parent=3490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/categories?post=3490"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zkhoist.com\/fa\/wp-json\/wp\/v2\/tags?post=3490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}