{"id":19985,"date":"2026-01-08T10:11:04","date_gmt":"2026-01-08T09:11:04","guid":{"rendered":"https:\/\/www.darda.de\/?page_id=19985"},"modified":"2026-01-08T10:11:04","modified_gmt":"2026-01-08T09:11:04","slug":"support-column","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/support-column","title":{"rendered":"Support column"},"content":{"rendered":"
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Support columns are vertical structural elements that transfer loads from slabs, beams, or superstructures safely<\/em> into the foundations. They shape the structural stability of a structure\u2014from industrial buildings to infrastructure and tunnels. In planning, repair, and particularly in concrete demolition and special demolition, targeted understanding of the support column determines a controlled, low-vibration approach. This is where material- and process-appropriate tools come in: In reinforced concrete, concrete pulverizers act on the composite of concrete and reinforcement; for massive, homogeneous cross-sections, rock and concrete splitters<\/a> powered by suitable hydraulic power units<\/a> are used. This allows load paths to be dismantled in a controlled manner, components to be separated selectively, and material flows to be kept pure by type\u2014a core objective of modern deconstruction strategies.<\/p>\n

Definition: What is meant by support column<\/h2>\n

A support column is a predominantly compression-loaded, vertical structural element that transfers the loads of a structure (permanent and variable actions) along defined load paths into the members below and ultimately into the foundation. Support columns can be made of reinforced concrete, steel, masonry, or composite cross-sections. Their structural behavior is determined by geometry (slenderness, buckling length), support conditions, material properties, and connection details. In existing buildings, combinations of axial force and bending frequently occur, for example due to eccentricities or lateral actions. For deconstruction and gutting works, this load and deformation behavior is decisive, as interventions influence the redistribution of loads in the system and require temporary shoring or re-shoring.<\/p>\n

Constructive features and load transfer<\/h2>\n

Support columns carry axial forces and\u2014depending on fixity and joint conditions\u2014also bending moments and shear. Reinforced concrete columns are made ductile and safeguarded against buckling and spalling by longitudinal reinforcement and shear\/transverse reinforcement (ties, spirals). Steel columns use profile geometries (IPE\/HE, hollow sections) for stabilization; masonry columns transfer compression through the bond and are sensitive to tension and lateral tension. Critical joints are the head and base points: load introduction there is provided via corbels, head plates, bearings, dowels, or connection details. In deconstruction, these zones determine the sequence of separation cuts, the use of concrete pulverizers, and the placement of stone and concrete splitters to achieve controlled fracture lines and a defined fragment size.<\/p>\n

Types and materials of support columns<\/h2>\n

Depending on the building task, various cross-section types and materials are used. The selection directly affects structural behavior, repair, and dismantling methods.<\/p>\n

Reinforced concrete columns<\/h3>\n

Widespread in building and civil engineering. Structural behavior is governed by the interaction of concrete and reinforcement. In deconstruction, concrete pulverizers<\/strong> are often used to crush concrete and expose reinforcement. For very massive, homogeneous core zones, stone and concrete splitters<\/strong> are suitable; they introduce forces via drill holes and deliberately control crack formation.<\/p>\n

Steel columns<\/h3>\n

High load-bearing capacity with slender cross-sections, sensitive to local damage causing local buckling and overall buckling. For dismantling and sectional disassembly, steel shears<\/em> and combination shears<\/em> are relevant; at mixed joints with attachments, Multi Cutters<\/em> can increase flexibility.<\/p>\n

Masonry columns and piers<\/h3>\n

Made of natural stone or brick. Behavior is strongly compression-oriented with low tensile strength. For selective deconstruction and heritage areas, low-vibration methods using stone and concrete splitters<\/strong> are sensible because they create controlled crack joints and minimize vibrations.<\/p>\n

Investigation and assessment prior to interventions<\/h2>\n

Before strip-out or deconstruction of a support column, condition and system effects must be assessed. This includes as-built documentation, rebar detection, material testing, visual inspection of crack patterns and connection details. The goal: identify load paths, define alternatives for temporary shoring, and plan the sequence of interventions. Particularly important is the assessment of slenderness and buckling lengths\u2014both determine stability during dismantling. Hydraulically powered tools require working space; its planning prevents unwanted restraint and facilitates targeted application of concrete pulverizers and splitting cylinders.<\/p>\n

Deconstruction of support columns: procedures and work steps<\/h2>\n

Dismantling proceeds step by step, aligned with the environment, the structure, and objectives (limits on noise, dust, and vibration, material separation):<\/p>\n

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  1. Load redistribution and shoring: Temporary props and beams take over loads. Exposing the joints reduces unexpected restraint forces.<\/li>\n
  2. Strip-out and separation of adjacent members: Slab and beam connections are released by cutting, drilling, or shearing with jaws.<\/li>\n
  3. Segmented disassembly: Concrete pulverizers<\/strong> crush reinforced concrete section by section; exposed reinforcement can be selectively cut. In massive, compact areas, stone and concrete splitters<\/strong> introduce well-dosed spreading forces via drill holes to create controlled fracture joints.<\/li>\n
  4. Handling and removal: Processed segments are secured with crane or lifting gear; the sequence minimizes tipping and buckling hazards.<\/li>\n
  5. Finishing work and control cuts: Remaining cross-sections and head and base zones are reworked; connection surfaces are prepared for follow-up works.<\/li>\n<\/ol>\n

    Tools and methods in the context of the support column<\/h2>\n

    The choice of method depends on material, cross-section, and environmental requirements. Hydraulic systems combine force, metering capability, and precision.<\/p>\n

    Concrete pulverizers in reinforced concrete deconstruction<\/h3>\n

    Concrete pulverizers act directly on the composite of concrete and reinforcement. They are suitable for releasing slab connections, removing corbels, and reducing columns in a controlled manner. Advantages include selective size reduction, exposure of steel components, and the ability to separate sections in an orderly way\u2014a plus for single-grade material flows and recycling rates.<\/p>\n

    Stone and concrete splitters for massive cross-sections<\/h3>\n

    Splitters use drill hole\u2013based spreading forces to build internal stress cones in the member. This creates defined crack lines without blasting techniques. That is especially useful for thick, homogeneous column cores, in sensitive environments, or in tunnel construction where vibrations and transmission should be limited. The necessary hydraulic power units provide the required pressures with compact dimensions.<\/p>\n

    Steel structures and composite columns<\/h3>\n

    For steel columns and composite cross-sections, combination shears<\/em>, steel shears<\/em>, and Multi Cutters<\/em> are used to cut profiles, plates, and reinforcement components separately and in a controlled manner. If steel parts are first exposed\u2014for example by jaw work on the concrete jacket\u2014dismantling can be tactically accelerated.<\/p>\n

    Application areas and particularities<\/h2>\n

    Support columns are central to numerous applications. The choice of method depends on environmental conditions and project objectives.<\/p>\n

    Concrete demolition and special demolition<\/h3>\n

    In complex existing structures, controlled reduction of column cross-sections is critical in concrete demolition and deconstruction<\/a>. Concrete pulverizers<\/strong> enable step-by-step removal and exposure of connection details. Stone and concrete splitters<\/strong> help open thick cross-sections with low vibration and guide fracture paths.<\/p>\n

    Strip-out and cutting<\/h3>\n

    Before column dismantling, adjacent structural members are separated. In this phase, the sequence of cuts is decisive to avoid unintended load-sharing effects. Hydraulic tools support a material-appropriate approach\u2014from joint exposure to controlled cross-section reduction.<\/p>\n

    Rock excavation and tunnel construction<\/h3>\n

    In underground works, rock or shotcrete piers assume supporting functions. Splitting methods allow targeted release of piers and temporary supports without transmitting unacceptable vibrations to the surroundings. The controllability of splitting forces simplifies coordination with stabilization measures.<\/p>\n

    Natural stone extraction<\/h3>\n

    In quarries, natural pillars and supports act as temporary load-bearing members. By splitting along anisotropic structures, the extraction process can be planned. Stone and concrete splitters<\/strong> support defined fracture guidance and protect the raw block.<\/p>\n

    Special applications<\/h3>\n

    In confined spaces, sensitive areas, or with structurally weakened supports, the fine-step force metering of hydraulic systems is advantageous. The combination of splitting, jaw work, and sectional cutting increases process safety.<\/p>\n

    Safety, planning, and sequence<\/h2>\n

    Interventions on support columns require coordinated safety and work concepts. Principles are to be understood generally and do not replace case-by-case evaluation.<\/p>\n