{"id":19244,"date":"2025-09-13T12:12:17","date_gmt":"2025-09-13T10:12:17","guid":{"rendered":"https:\/\/www.darda.de\/lifting-device"},"modified":"2026-04-14T11:34:02","modified_gmt":"2026-04-14T09:34:02","slug":"lifting-device","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/lifting-device","title":{"rendered":"Lifting device"},"content":{"rendered":"<div class=\"wissen-inhaltsbereich\">\n<p>Lifting devices are central elements of lifting and positioning technology on construction sites, in workshops, and in quarries. They enable the safe lifting, holding, and lowering of components, machines, and rock blocks. In concrete demolition, gutting, and special demolition, they are used to move loads in a controlled manner, secure components, and transport segments away after cutting or breaking down. In direct conjunction with tools such as concrete demolition shear or <a href=\"https:\/\/www.darda.de\/en\/product-overview\/hydraulic-rock-and-concrete-splitters\">rock and concrete splitters<\/a>, lifting devices ensure stability and process reliability: components are balanced before gripping, supported during breaking, and purposefully repositioned after splitting or cutting. Properly engineered lifting arrangements reduce dynamic effects, safeguard adjacent structures, and enable reproducible workflows.<\/p>\n<h2>Definition: What is a lifting device?<\/h2>\n<p>A lifting device is a technical device or a system of devices used for vertical or controlled inclined movement of loads. This includes manual or powered hoists (e.g., chain hoists), hydraulic lifting systems (e.g., low-profile cylinders, lifting jacks) as well as complementary components such as spreader beams and load handling attachments. The goal is the <em>safe<\/em> lifting, holding, and lowering while observing the load-bearing capacity, the center of gravity, and the stability of the overall structure. In practice, the lifting device, slings, load handling attachments and &#8211; if hydraulically operated &#8211; a hydraulic power pack form a functional unit. Lifting devices are distinct from cranes but can be combined with auxiliary structures such as gantries or frames. Application is carried out in accordance with the applicable technical standards, the manufacturer\u2019s instructions, and a previously conducted hazard analysis and method statement.<\/p>\n<h2>Design and operating principle of lifting devices<\/h2>\n<p>Lifting devices transmit forces to the load via mechanical, hydraulic, or combined systems. Mechanical solutions (e.g., chain hoists, screw jacks) operate via gears, spindles, and chains with gear ratios that allow high loads to be handled with modest operator input. Hydraulic systems use fluid pressure to amplify force: a hydraulic cylinder converts the supplied pressure into lifting force, which acts on the load via piston rods, prisms, or spreader beams. Decisive factors are a sufficiently dimensioned load path, even force distribution, and safe support against tilt- or slip-prone ground. Additional elements such as valves (for load holding), pressure relief, and sensitive controls enable controlled movements and minimize impact loads on the component. For multi-point lifts, flow dividers or synchronous controls improve stroke uniformity; solid cribbing and anti-slip interfaces enhance stability during each increment.<\/p>\n<h2>Types of lifting devices in demolition, deconstruction, and extraction<\/h2>\n<p>Depending on the application, different lifting systems are used, often in combination with cutting and crushing tools such as concrete demolition shear or stone and concrete splitting devices:<\/p>\n<ul>\n<li>Hydraulic low-profile and hollow-piston cylinders: low installation height, precise stroke, ideal for lifting and shifting loads on massive components.<\/li>\n<li>Spreader beams and crossbeams: distribute the load, improve center-of-gravity positioning, and protect edges of sensitive components.<\/li>\n<li>Chain and wire-rope hoists: manual or powered, for suspended lifting, often at ceiling openings, gantries, or auxiliary structures.<\/li>\n<li>Lifting jacks and support stands: temporary support to secure before and during breaking\/crushing.<\/li>\n<li>Lifting airbags (hydraulic\/pneumatic): area-wide force introduction on sensitive surfaces with limited stroke.<\/li>\n<li>Transport aids (rollers, machine skates): horizontal repositioning after lifting, often as the final step in the sequence.<\/li>\n<li>Toe jacks and low-built lifting jacks: engage under minimal clearances; suitable for incremental lifts with cribbing.<\/li>\n<li>Synchronous lifting systems and manifolds: coordinated multi-cylinder control for level, parallel lifts with monitored pressure and stroke.<\/li>\n<\/ul>\n<h2>Use with concrete demolition shear, stone and concrete splitting devices<\/h2>\n<p>In concrete demolition and special demolition, lifting devices stabilize components before gripping with concrete demolition shear, reduce uncontrolled movements during breakout, and enable safe placement after breaking down. In rock breakout or natural stone extraction, stone and concrete splitting devices separate the block along a defined line; lifting devices then take over the lift, prevent jamming, and facilitate controlled rotation or tilting of the segments. This reduces weights, enables planned load paths, and adapts lifting operations to spatial constraints &#8211; such as low installation heights or limited lifting points. Pre-tensioned slings, taglines, and progressive lifting reduce swing and pinch-point risks and help maintain component orientation.<\/p>\n<h2>Planning, load calculation, and selection criteria<\/h2>\n<p>The selection of a suitable lifting device is based on a systematic evaluation of load, geometry, and environmental conditions. Important criteria are load-bearing capacity, stroke, installation height, actuation, and compatibility with existing tools.<\/p>\n<h3>Load and center of gravity<\/h3>\n<p>Determine the load weight conservatively, accounting for allowances for adherent material, reinforcement, embedded parts, and moisture. The <strong>center of gravity<\/strong> must lie within the support and attachment geometry; for components with variable mass distribution, adjustable spreader beams or multiple lifting points are advisable. Where the center of gravity is uncertain, use short trial lifts and incremental adjustments to confirm balance before lifting to height.<\/p>\n<h3>Load-bearing capacity and safety margins<\/h3>\n<p>Select the lifting device and slings with adequate <strong>load-bearing capacity<\/strong> and documented identification. Pay attention to the effect of sling angles on lifting chains as well as to edges and bend radii. Even load distribution reduces localized overstress. Consider dynamic factors from cutting or breakout, and derate for angle, temperature, and mode of hitch; use edge protection and compatible shackles to maintain the working load limit.<\/p>\n<h3>Stroke, installation height, and accessibility<\/h3>\n<p>In tight deconstruction environments, the installation height and required stroke determine the equipment choice. Low-profile cylinders or low-built lifting jacks are advantageous when components must be raised or relieved by a few millimeters prior to using concrete demolition shear. Provide sufficient access for rigging, torqueing, hose routing, and control visibility; plan for stepwise lifting with cribbing where headroom is limited.<\/p>\n<h3>Environmental conditions<\/h3>\n<p>Dust, moisture, temperature, and subgrade strength influence the choice of seals, corrosion protection, bearing pads, and the type of load engagement. Load distribution plates improve stability on <em>uneven<\/em> or capacity-critical subgrades. Chemical exposure, ice or mud, and restricted ventilation can further affect friction, seal life, and control precision; select materials and surfaces accordingly.<\/p>\n<h2>Load handling and rigging technique<\/h2>\n<p>The connection between the lifting device and the component is made via suitable load handling attachments and lifting points. Typical measures include:<\/p>\n<ul>\n<li>Drilled anchors, eyebolts, or tested built-in components as lifting points in concrete elements.<\/li>\n<li>Spreader beams for centering the center of gravity and reducing edge loads.<\/li>\n<li>Edge protection and protective sleeves to preserve lifting chains and component edges.<\/li>\n<li>Redundant slings when load orientation is uncertain or dynamic effects are expected.<\/li>\n<li>Correct shackle alignment and pin seating; avoid torsion in chains and wire ropes, and verify latch functionality on hooks.<\/li>\n<li>Use of taglines for guiding suspended loads and to prevent rotation where geometry or wind effects are critical.<\/li>\n<\/ul>\n<h2>Hydraulic power packs, control, and interfaces<\/h2>\n<p>Hydraulically operated lifting devices require <a href=\"https:\/\/www.darda.de\/en\/product-overview\/hydraulic-power-units\">appropriately matched hydraulic power units<\/a>. Pressure, flow rate, and valve technology determine lifting force, speed, and control quality. In projects where concrete demolition shear, stone and concrete splitting devices, or other hydraulic tools from Darda GmbH are used, matching the interfaces is essential: hose lengths, couplings, pressure relief, and the sequence of actuators must be selected so that no mutual interference occurs and operation remains clear. Sensitive controls with counterbalance valves support controlled lowering of heavy segments. Filtration quality, pressure gauges on each circuit, and remote or pendant controls improve reliability and monitoring; where several cylinders are used, a manifold with individual metering enhances synchronization.<\/p>\n<h2>Safety, operations management, and legal framework<\/h2>\n<p>Lifting operations must be carefully planned and carried out by qualified personnel. Before commissioning, visual and functional checks are required; during lifting, exclusion zones apply and the principle of never working under suspended loads must be observed. Operating instructions, regular training, and periodic inspections by competent persons are part of a legally compliant organization. Legal issues are always project-specific and follow generally accepted technical standards, relevant regulations, and the manufacturer\u2019s specifications. A written lift plan, defined roles (e.g., supervisor, signaler), and clear communication protocols reduce the risk of miscoordination; ground bearing verification and cribbing plans are integral to safe staging.<\/p>\n<h2>Best practices on the construction site<\/h2>\n<ol>\n<li>Analyze the load and determine the center of gravity; define and mark lifting points.<\/li>\n<li>Select the lifting device, slings, and load handling attachments with sufficient capacity; prepare bearing surfaces.<\/li>\n<li>Perform a trial lift at low height, check load orientation, and correct rigging if necessary.<\/li>\n<li>Lift, position, or lower with smooth, coordinated movements; ensure team communication.<\/li>\n<li>After splitting or gripping with concrete demolition shear, place the component in a controlled manner, de-tension the slings, and only then release them.<\/li>\n<li>Use stepwise lifting with cribbing to secure each increment; regularly reassess sling angles and contact pressures.<\/li>\n<li>Maintain exclusion zones, apply taglines as needed, and pause operations if unexpected movement or pressure deviations occur.<\/li>\n<li>Document the lift, record inspections, and store equipment clean and protected after use.<\/li>\n<\/ol>\n<h2>Maintenance, inspection, and typical fault patterns<\/h2>\n<p>Regular care increases operational safety: check hydraulic systems for leaks, clean and lightly protect piston rods, inspect slings for wear, cracks, or deformation. Typical observations include pressure drop under load, uneven stroke, increased friction, or damaged chain links. If deviations occur, the equipment must be taken out of service and professionally inspected. Scheduled inspections with traceable records, correct storage (dry, protected from UV and chemicals), and timely replacement of seals and hoses reduce unplanned downtime.<\/p>\n<h2>Application examples from the fields of use<\/h2>\n<h3>Concrete demolition and special demolition<\/h3>\n<p>Before breaking out wall or concrete slab segments with concrete demolition shear, the component area is slightly relieved using low-profile cylinders and secured with spreader beams. The lifting device then enables defined lowering and targeted placement without collateral damage to adjacent components. Pressure monitoring and staged lowering minimize shock loads into the supporting structure.<\/p>\n<h3>Strip-out and cutting<\/h3>\n<p>When separating superstructures or installations, lifting devices support components prior to cutting. After cutting through, chain hoists and lifting jacks take over controlled removal from the installed position before the material is transferred for haulage. Where access is restricted, compact cylinders with short strokes allow progressive relocation with intermediate blocking.<\/p>\n<h3>Rock breakout and tunnel construction<\/h3>\n<p>After deploying stone and concrete splitting devices, released blocks are picked up with spreader beams and rotated or shifted within the tight tunnel cross-section. Low-profile hydraulic cylinders are advantageous here, as the installation height is limited and stability has the highest priority. Load distribution mats and anti-slip supports increase safety on uneven subgrades.<\/p>\n<h3>Natural stone extraction<\/h3>\n<p>Separated raw blocks are moved with protected lifting points and properly sized spreader beams. Lifting devices help preserve surfaces and avoid edge spalling, while stone splitting cylinders create the desired raw block geometry. Incremental lifting with cribbing preserves block integrity and supports precise alignment for subsequent processing.<\/p>\n<h3>Special applications<\/h3>\n<p>In tight installation conditions, contaminated sites, or sensitive environments (e.g., during tank dismantling with segment-by-segment removal), finely controllable lifting systems enable safe positioning, intermediate storage, and relocation of the segments. Remote controls and low-noise equipment support work in areas with restricted access or heightened protection requirements.<\/p>\n<h2>Terminology and interfaces with other tools<\/h2>\n<p>Lifting devices are to be distinguished from hoists and load handling attachments in terms of terminology, but in practical use they act as a networked system. Tools such as combination shears, <a href=\"https:\/\/www.darda.de\/en\/product-overview\/multi-cutters\">Multi Cutters<\/a>, steel shears, or tank cutters create cut edges, release connections, and reduce weights &#8211; lifting devices take over secure holding and moving of the resulting segments. Coordinated use increases safety, precision, and efficiency throughout the entire process, provided interfaces, capacities, and control sequences are harmonized in advance.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Lifting devices are central elements of lifting and positioning technology on construction sites, in workshops, and in quarries. They enable the safe lifting, holding, and lowering of components, machines, and rock blocks. In concrete demolition, gutting, and special demolition, they are used to move loads in a controlled manner, secure <a class=\"moretag\" href=\"https:\/\/www.darda.de\/en\/knowledge\/lifting-device\">read more&#8230;<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"parent":14846,"menu_order":0,"comment_status":"open","ping_status":"open","template":"tmpl\/template-wissen.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-19244","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lifting Device - Hoisting Systems for Demolition<\/title>\n<meta name=\"description\" content=\"Essential guide to lifting devices in construction and demolition \u2713 selection, safety &amp; hydraulics.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.darda.de\/en\/knowledge\/lifting-device\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lifting Device - 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