{"id":19361,"date":"2025-08-25T12:37:53","date_gmt":"2025-08-25T10:37:53","guid":{"rendered":"https:\/\/www.darda.de\/crane-jib-boom"},"modified":"2026-04-22T12:06:03","modified_gmt":"2026-04-22T10:06:03","slug":"crane-jib-boom","status":"publish","type":"page","link":"https:\/\/www.darda.de\/en\/knowledge\/crane-jib-boom","title":{"rendered":"Crane jib boom"},"content":{"rendered":"<div class=\"wissen-inhaltsbereich\">\n<p>The crane jib boom is the central load-bearing and reach element of a crane. It defines how far and at what angle loads can be traveled, lifted, or repositioned. In demanding projects such as concrete demolition and special demolition, building gutting and cutting, rock excavation and tunnel construction, natural stone extraction as well as special operations, the crane jib boom determines accessibility, cycle times, and safety. Especially when precise tools such as concrete demolition shears or <a href=\"https:\/\/www.darda.de\/en\/product-overview\/hydraulic-rock-and-concrete-splitters\">rock and concrete splitters<\/a> are used, the crane jib boom governs safe positioning, load handling, and the interaction with <a href=\"https:\/\/www.darda.de\/en\/product-overview\/hydraulic-power-units\">hydraulic power units<\/a> and rigging.<\/p>\n<p>In practice, the jib boom defines the <em>operational envelope<\/em> of the lifting system: reach, working angles, tip loads, and permissible dynamics. Correct jib selection and a configuration aligned with the tool and rigging determine productivity, structural reserves, and compliance with the applicable load charts and operating limits.<\/p>\n<h2>Definition: What is meant by a crane jib boom?<\/h2>\n<p>A crane jib boom is the load-bearing jib system of a crane that brings the load-handling device (e.g., hook, hook block, trolley) into a defined working radius. The jib boom transfers forces and moments from the load, self-weight, wind, and dynamic movements into the upper and lower crane structure. Depending on the design (telescopic crane jib boom, lattice mast, luffing jib, tower crane jib boom), the kinematics vary: boom length, boom angle, outreach, and any auxiliary jibs determine the load chart. <strong>Load capacity<\/strong> is always a function of outreach, configuration, and environmental conditions.<\/p>\n<ul>\n<li><strong>Heel and head<\/strong>: connection to the superstructure and sheave head for rope routing or trolley guidance<\/li>\n<li><strong>Luffing system<\/strong>: cylinders or pendants to adjust jib angle and absorb compressive-tensile loads<\/li>\n<li><strong>Reeving and guying<\/strong>: rope systems and guy lines that stabilize, transmit forces, and influence deflection<\/li>\n<li><strong>Auxiliary elements<\/strong>: fly jibs, inserts, and extensions that adapt reach and tip load to the task<\/li>\n<\/ul>\n<h2>Types and construction of crane jib booms<\/h2>\n<p>Crane jib booms can be grouped into a few basic types from a structural perspective. Selection is based on application profile, required reach, loads, and site geometry. For deconstruction and demolition, high precision and low vibration are often required so that tools such as concrete demolition shears, combination shears, or Multi Cutters can be guided in a controlled manner. A stiff, low-deflection setup with predictable dynamics supports repeatable cycles and precise edge work.<\/p>\n<h3>Telescopic crane jib booms<\/h3>\n<p>Telescopic crane jib booms consist of nested, high-strength steel sections that are hydraulically extended. Advantages include short setup times, variable length, and compact transport dimensions. They are often combined with auxiliary jibs (tip, jib) to increase reach or bridge obstructing building elements.<\/p>\n<ul>\n<li><strong>Strengths<\/strong>: rapid deployment, fine length adaptation, minimal assembly space<\/li>\n<li><strong>Limitations<\/strong>: deflection grows with outreach, section sequencing affects tip stiffness, attention to wear pads and hydraulic lines required<\/li>\n<\/ul>\n<h3>Lattice-mast and luffing crane jib booms<\/h3>\n<p>Lattice-mast jibs are assembled from individual mast sections. They are lightweight, torsionally stiff, and enable large reaches with favorable self-weight. Luffing crane jib booms (luffing jib) allow adjustment of the boom angle at constant length. In urban deconstruction, the luffing jib is advantageous to avoid collisions and to guide loads without a large slewing radius.<\/p>\n<p>Assembly requires clear logistics and sufficient laydown areas for sections and pins. Out-of-service conditions and wind parking positions must be planned to prevent excessive back-sailing or unintended jib movements in gusts.<\/p>\n<h3>Crane jib booms of tower cranes<\/h3>\n<p>On tower cranes with luffing or flat-top jibs, load handling is performed via trolleys. This allows very sensitive pre-positioning of tools, components, or demolition loads. For building gutting and cutting work, hydraulic power packs can be placed on floors and supply tools such as concrete demolition shears, steel shears, or cutting torches.<\/p>\n<p>Modern trolley and slewing controls enable <em>creep speeds<\/em> for millimetric positioning. Anti-collision and zoning functions support operations above courtyards, access routes, and adjacent structures.<\/p>\n<h2>Load capacity, load moment and load chart<\/h2>\n<p>The planning and executing parties must safely control load capacities. Decisive are the load moment and the load chart of the respective crane in the chosen crane jib boom configuration. The following influencing factors are relevant in practice, especially when tools and components are alternately handled on the hook:<\/p>\n<ul>\n<li>Outreach (working radius) and boom angle<\/li>\n<li>Boom configuration (telescopic length, jib, guying)<\/li>\n<li>Self-weight of rigging and tools (e.g., concrete demolition shears, rock and concrete splitters, hydraulic demolition shears)<\/li>\n<li>Dynamic additional loads from acceleration, braking, and oscillations<\/li>\n<li>Wind loads and aerodynamic effects of large-surface components<\/li>\n<li>Ground, support footprint and crane standing (bearing pressure, settlements)<\/li>\n<\/ul>\n<p>In deconstruction work, the <em>effective load<\/em> is often higher than the component weight alone, since accessories, hydraulic hose lines, and power unit lines are carried along. In addition, impact and jerk loads can occur when releasing components. Conservative planning, the selection of suitable rigging, and controlled working minimize these effects.<\/p>\n<ol>\n<li>Determine gross load: component plus rigging, tool, adapter plates, media lines, and any retained debris.<\/li>\n<li>Convert to load moment at the planned outreach; consider the worst-case angle within the working sector.<\/li>\n<li>Compare with the load chart for the exact configuration; apply configuration notes and reductions.<\/li>\n<li>Account for wind, dynamic factors, and load shape; reduce permissible capacities accordingly.<\/li>\n<li>Document the result in the lift plan and obtain required approvals where applicable.<\/li>\n<\/ol>\n<h2>Crane jib boom in concrete demolition and special demolition<\/h2>\n<p>In deconstruction, crane jib booms are used to pre-position components, separate them in a controlled manner with concrete demolition shears, or crack them with rock and concrete splitters with low pressure. The crane takes over safe holding and traveling while the tool cuts or splits. This reduces noise, vibration, and dust, which is advantageous in sensitive environments.<\/p>\n<p>Sequenced working steps help avoid prying effects and uncontrolled load release: pre-load the element slightly, perform the cut or split, stabilize with short taglines, and then remove and set down with minimal slewing at a balanced outreach.<\/p>\n<h3>Selective deconstruction in existing structures<\/h3>\n<p>During building gutting, hydraulic power packs are relocated by crane onto slabs. From there, they supply tools via hose lines. The crane jib boom is used to follow up with protective and separating elements and to transport away components that have been separated. Concrete demolition shears are suitable for nibbling balcony slabs, lintels, and parapets when they are held under load and separated section by section.<\/p>\n<ul>\n<li>Typical elements: stair flights, parapet panels, fa\u00c3\u00a7ade lintels, balcony noses, equipment foundations<\/li>\n<li>Auxiliary measures: edge protection, catch platforms, dust suppression at the cut zone<\/li>\n<\/ul>\n<h3>Cutting, separating, holding<\/h3>\n<p>When cutting reinforcement, beams, or tanks, steel shears, Multi Cutters, and cutting torches are used. The crane jib boom holds the component free of load to avoid pinching and to relieve the cut. This reduces the risk of pendulum movements and uncontrolled fracture edges.<\/p>\n<p>Hot-cutting operations require shielding against sparks and heat as well as continuous monitoring of adjacent materials. A dedicated fire watch and prepared extinguishing media support risk control.<\/p>\n<h2>Rigging tools and components to the crane jib boom<\/h2>\n<p>Load handling at the crane jib boom requires suitable rigging, lifting points, and clear load control. The following principles support stable work with tools:<\/p>\n<ol>\n<li>Clarify weight and center of gravity: fully account for tool, rigging, and media lines.<\/li>\n<li>Prefer positive-locking, redundant slinging methods; observe adequate sling angles.<\/li>\n<li>Guide with taglines to control slewing and rotation.<\/li>\n<li>Low-vibration working method: smooth travel, gentle hoisting\/lowering, short outreach with heavy tools.<\/li>\n<li>Keep the hazard zone clear, use unambiguous signals, and ensure clear role allocation between crane and demolition teams.<\/li>\n<li>Capture torque reactions from shears or splitters with secondary rigging to prevent twist at the hook.<\/li>\n<li>Use swivels and rotation limiters where appropriate to avoid hose torsion and uncontrolled spin.<\/li>\n<\/ol>\n<p>For tools such as concrete demolition shears, defined guidance is essential to apply biting forces precisely. Rock and concrete splitters are often delivered via the crane jib boom into core drill holes, shafts, or to hard-to-reach components and used there.<\/p>\n<h2>Reach and access in rock excavation and tunnel construction<\/h2>\n<p>In rock excavation and tunnel construction, controlled energy input is crucial. Where vibrations and blasting are limited, rock wedge splitters can be positioned with the help of the crane. The crane jib boom bridges uneven terrain, slopes, or shaft heads and allows safe, vertical placement of the devices. By operating hydraulic power packs at a safe distance, operation is spatially separated while the crane holds the load steadily.<\/p>\n<p>Restricted clearance, poor visibility, and uneven ground call for shortened outreach, fine slewing control, and robust tagline guidance. Lighting, communication, and barrier concepts must be coordinated with the excavation sequence.<\/p>\n<h2>Natural stone extraction and special operations<\/h2>\n<p>In quarries or in special operations with limited access, the crane jib boom enables rapid positioning of splitting tools in drilling rows. Multi Cutters can also be used to sever secondary parts or to cut free the quarry face. The low self-weight of many tools combined with precise load control is an advantage when the tip load of the crane is limited.<\/p>\n<p>Abrasive dust, inclined benches, and thermal influences on hoses and seals require short inspection intervals and protected routing of media lines. Defined set-down areas and stable contact surfaces reduce edge loading at the quarry face.<\/p>\n<h2>Technical parameters of a crane jib boom<\/h2>\n<p>Several parameters are decisive for planning. They determine the suitability of the crane jib boom for the respective tools and components:<\/p>\n<ul>\n<li>Boom length, telescopic sections, jib configuration<\/li>\n<li>Maximum and minimum outreach, working diagram<\/li>\n<li>Tip load and load-moment limitation<\/li>\n<li>Deflection and permissible vibration amplitudes<\/li>\n<li>Guying, sheave heads, rope routing, and trolley parameters<\/li>\n<li>Hoist and trolley speeds under load, slewing acceleration and deceleration<\/li>\n<li>Control features: fine-positioning modes, anti-sway assistance, and soft-stop functions<\/li>\n<\/ul>\n<p>Low deflection and a stiff setup improve the guidance of concrete demolition shears, especially when positioning precisely at edges or reinforcement zones. <em>Low-vibration<\/em> crane jib boom configurations are often advantageous in urban deconstruction.<\/p>\n<h2>Work preparation: location, support, and cycle<\/h2>\n<p>The crane standing position determines the possible outreach. Support pressures, substructure, and effects on underlying slabs must be clarified at an early stage. For phases with concrete demolition shears or rock and concrete splitters, a cycle plan that coordinates the interplay of positioning, cutting\/splitting, and removal is helpful.<\/p>\n<p>Method statements and lift plans define sequences, communication, and exclusion zones. Load paths, interim set-down points, and backup scenarios (e.g., weather interruption) are determined before mobilization to stabilize cycle times.<\/p>\n<h3>Matching crane and tool performance<\/h3>\n<p>The performance data of the tools (e.g., thrust force, cutting force, splitting pressure) should harmonize with crane capacity at the respective outreach. An overly heavy tool at large outreach limits reserves for dynamic effects. A lighter tool with sufficient power can be guided more precisely at the limit of outreach.<\/p>\n<p>Hydraulic flow and pressure requirements must match the available power pack capacity at the planned hose length. Pressure losses and heat input increase with hose length and elevation differences and should be considered when positioning the power pack.<\/p>\n<h2>Power supply and media routing<\/h2>\n<p>Hydraulic power packs supply concrete demolition shears, hydraulic demolition shears, Multi Cutters, or rock wedge splitters. They are often transported via the crane jib boom to the place of use or placed on intermediate levels. Hose bundles must be protected against abrasion, relieved, and routed so that no additional pendulum dynamics arise. A clear separation of load path and media path increases safety.<\/p>\n<ul>\n<li>Use hose saddles, strain reliefs, and protective sleeves at edges and transitions.<\/li>\n<li>Bundle hoses compactly and avoid loops; keep them outside the pinch and cut zones.<\/li>\n<li>Provide drip trays and clean quick couplings; manage fluids to protect surfaces and the environment.<\/li>\n<li>Color-code supply and return lines and mark emergency shut-off points clearly.<\/li>\n<\/ul>\n<h2>Safety, environment, and regulations<\/h2>\n<p>Safe crane operations require qualified personnel, suitable rigging, and compliance with applicable standards and operating manuals. Weather (especially wind) must be assessed before and during lifting. In deconstruction, protective measures against dust, noise, and falling parts must be implemented. For work above traffic or protected areas, additional safety and closure concepts must be provided. Information in operating manuals and load charts must be strictly observed; project-specific approvals are issued based on a technical assessment.<\/p>\n<ul>\n<li>Conduct pre-lift meetings with defined signals, roles, and no-go zones.<\/li>\n<li>Monitor wind and weather thresholds; adapt outreach and configurations accordingly.<\/li>\n<li>Plan emergency procedures for loss of power, tool failure, or blocked rotation.<\/li>\n<li>Establish exclusion zones and overhead protection matched to the cutting or splitting method.<\/li>\n<\/ul>\n<h2>Combination with carrier machines<\/h2>\n<p>Tasks are often efficient when crane jib booms and carrier machines work together. Excavator attachments take on material-intensive primary demolition; the crane positions concrete demolition shears for precise separation cuts, lifts out separated elements, and guides them away in a controlled manner. Cutting torches, steel shears, and hydraulic demolition shears sever structures while the crane jib boom holds the parts free of load.<\/p>\n<ul>\n<li>Coordinate handover points and timings to avoid parallel movements in the same sector.<\/li>\n<li>Define a common radio protocol and backup hand signals for low-visibility phases.<\/li>\n<li>Use taglines to stabilize during handover between hook and attachment.<\/li>\n<\/ul>\n<h2>Practical selection criteria for the right crane jib boom<\/h2>\n<ul>\n<li>Site geometry: obstacles, building heights, access routes, courtyards<\/li>\n<li>Load spectrum: typical component weights, tool masses, tip loads<\/li>\n<li>Reach vs. precision: required outreach, permissible pendulum paths<\/li>\n<li>Setup and cycle times: frequency of re-rigging, need for jibs<\/li>\n<li>Subsoil and support: bearing capacity, temporary reinforcements<\/li>\n<li>Environmental requirements: noise, vibration, dust<\/li>\n<li>Assembly logistics: space for sections, access for support equipment, transport paths<\/li>\n<li>Control characteristics: fine-positioning capability, speed scaling, anti-sway support<\/li>\n<\/ul>\n<h2>Typical sources of error and how to avoid them<\/h2>\n<ul>\n<li>Underestimating the self-weight of rigging and media lines<\/li>\n<li>Working close to load limits without reserves for dynamic effects and wind<\/li>\n<li>Lack of taglines and uncontrolled rotation on the hook<\/li>\n<li>Insufficient coordination between crane operator and tool operator<\/li>\n<li>Missing intermediate supports for long telescopic sections or jib configurations<\/li>\n<li>Ignoring jib deflection and resulting misalignment of cutting or splitting positions<\/li>\n<li>Inadequate support pressure verification and insufficient crane mats on sensitive slabs<\/li>\n<\/ul>\n<h2>Terminology and metrics at a glance<\/h2>\n<ul>\n<li><strong>Outreach<\/strong>: horizontal distance between slewing center and load plumb line<\/li>\n<li><strong>Load moment<\/strong>: product of load and outreach, decisive for capacity<\/li>\n<li><strong>Tip load<\/strong>: maximum load capacity at the crane tip in a defined configuration<\/li>\n<li><strong>Luffing range<\/strong>: angle range within which the boom can be adjusted<\/li>\n<li><strong>Load chart<\/strong>: table\/diagram of permissible loads depending on outreach and configuration<\/li>\n<li><strong>Slewing radius<\/strong>: maximum circular path swept by the jib and load<\/li>\n<li><strong>Duty class<\/strong>: classification of usage severity and cycle intensity for structural components<\/li>\n<li><strong>Dynamic factor<\/strong>: allowance for accelerations, wind gusts, and impact loads in planning<\/li>\n<\/ul>\n<p>Through the interaction of crane jib boom, tool, and working method, demanding tasks in concrete demolition, building gutting, rock excavation, natural stone extraction, and special operations can be executed safely, precisely, and efficiently. By choosing a suitable jib configuration, maintaining clean load control, and using concrete demolition shears as well as rock and concrete splitters in a coordinated manner, a controlled, plannable workflow is achieved. Careful documentation, trained personnel, and consistent monitoring of operating limits consolidate safety and performance across all project phases.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>The crane jib boom is the central load-bearing and reach element of a crane. It defines how far and at what angle loads can be traveled, lifted, or repositioned. In demanding projects such as concrete demolition and special demolition, building gutting and cutting, rock excavation and tunnel construction, natural stone <a class=\"moretag\" href=\"https:\/\/www.darda.de\/en\/knowledge\/crane-jib-boom\">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":"","_members_access_role":[],"_members_access_error":""},"class_list":["post-19361","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Crane Jib Boom Types, Uses &amp; Load Charts<\/title>\n<meta name=\"description\" content=\"Essential guide to crane jib boom use in construction &amp; demolition \u27a4 load charts, reach &amp; safety for precise handling.\" \/>\n<meta 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