Gantry cranes are one of those pieces of equipment that most people walk past without a second thought, right up until they need one. Then suddenly, questions come thick and fast: What size I-beam do I need? What does LOLER actually require? Can I build one myself?
If you can relate to any of these questions or even have more, never fear, dear reader!
That’s because Metreel specialise in gantry cranes, as we supply them to businesses across the UK and beyond.
Whether you’re specifying a crane for a new facility, trying to get your head around your maintenance obligations or you’ve just developed a general interest in lifting equipment, this post is for you.
What Is A Gantry Crane?
A gantry crane is a type of overhead lifting crane supported by freestanding legs that run along ground-level rails or wheels, rather than being suspended from a ceiling-mounted runway. Unlike bridge cranes, gantry cranes are self-supporting, making them suitable for both indoor workshops and outdoor yards. They typically consist of a horizontal beam (the bridge), two or more supporting legs and a hoist or trolley that travels along the beam to lift and reposition loads. Gantry cranes are widely used across manufacturing, construction, shipbuilding and logistics and are available in single-girder and double-girder configurations to suit different load capacities and span requirements.
What Is A Gantry Crane Used For?
Gantry cranes are used for lifting, moving and positioning heavy loads in environments where a fixed overhead crane system is not practical. Common applications include loading and unloading materials in warehouses and fabrication yards, handling steel beams and precast concrete on construction sites, positioning machinery during installation or maintenance and managing containers at ports and rail terminals. In manufacturing, gantry cranes support production lines where components need to be moved between workstations. Their portability and freestanding structure make them particularly useful for outdoor use or facilities where ceiling-mounted infrastructure is unavailable.
What Is A Rail-Mounted Gantry Crane?
Gantry cranes are used for lifting, moving and positioning heavy loads in environments where a fixed overhead crane system is not practical. Common applications include loading and unloading materials in warehouses and fabrication yards, handling steel beams and precast concrete on construction sites, positioning machinery during installation or maintenance and managing containers at ports and rail terminals. In manufacturing, gantry cranes support production lines where components need to be moved between workstations. Their portability and freestanding structure make them particularly useful for outdoor use or facilities where ceiling-mounted infrastructure is unavailable.
How To Build A Gantry Crane
Building a gantry crane requires careful planning around load capacity, span width, height and operating environment. The main structural components are the horizontal beam (typically a steel I-beam or box section), two vertical legs and the base frame or wheels. Begin by calculating the required Safe Working Load (SWL) and applying appropriate safety factors in line with BS EN 15011 and LOLER 1998. Select an I-beam rated to handle the bending forces across the intended span, then fabricate or source the leg assemblies, ensuring they are plumb and braced against lateral movement. Welded joints should be inspected to BS EN ISO 3834 standards. Before use, a thorough examination by a competent person is a legal requirement under LOLER, and all lifting operations must comply with the Lifting Operations and Lifting Equipment Regulations 1998.
What Size I Beam For A Gantry Crane?
The correct I-beam size for a gantry crane depends on three key variables: the intended Safe Working Load (SWL), the span between the crane legs and the beam’s unsupported length. As a general guide, a 1-tonne SWL crane with a 3-metre span may be adequately served by a 152 x 152 UC section, while a 2-tonne crane spanning 5 metres would typically require a 203 x 203 UC or heavier. Beam selection must account for bending moment, deflection limits (generally L/500 is recommended for crane beams) and the dynamic load factor introduced by the hoist. Always engage a structural engineer to carry out formal calculations before fabrication, ensuring compliance with BS EN 1993 (Eurocode 3) and LOLER requirements.
How To Install A Gantry Crane
Installing a gantry crane involves a structured process to ensure structural integrity and compliance with LOLER 1998. Begin by preparing a level, load-bearing surface capable of supporting the crane’s dead weight plus dynamic lifting loads, with appropriate spreader plates used where ground conditions are soft. Assemble the leg assemblies and connect them to the bridge beam, checking that all bolted connections are torqued to the manufacturer’s specification. If the crane is rail-mounted, ensure tracks are laid parallel and to the correct gauge before installation. Once assembled, a pre-use thorough examination must be carried out by a competent person, and the crane must be load-tested before entering service. Records of examination and test certificates must be retained in accordance with LOLER and PUWER 1998.
What Are The Main Parts Of A Gantry Crane?
The principal components of a gantry crane are the bridge beam (the horizontal girder that carries the hoist), the end trucks or saddles (which connect the beam to the legs), the legs (vertical structural members supporting the bridge), and the base frame or runway assembly (either wheels, castors or rails). The hoist unit whether chain, wire rope or electric, travels along the bridge beam on a trolley. Additional components include end stops to prevent the trolley from overrunning the beam, festoon cable carriers to manage power and control cabling, and the pendant or remote-control station. On larger cranes, limit switches, overload protection devices and anti-collision systems are fitted as standard to comply with BS EN 15011.
What Is A Semi Gantry Crane?
A semi gantry crane is a hybrid configuration in which one side of the bridge beam is supported by a freestanding leg running on a ground-level rail, while the opposite side is supported by a wall-mounted or column-mounted runway at height. This arrangement is useful where floor space is restricted on one side of a bay, or where an existing building structure can be used to support one end of the crane, reducing the need for a second ground-level rail installation. Semi gantry cranes are commonly used in fabrication shops, storage facilities and maintenance buildings. Like full gantry cranes, they must be designed in accordance with BS EN 15011 and subjected to a thorough examination under LOLER 1998 before being put into service.
What Is The Difference Between A Gantry Crane And An Overhead Crane?
The primary difference is how the bridge beam is supported. An overhead (or bridge) crane is suspended from runway beams fixed to the building’s roof structure or dedicated support columns, meaning the crane relies on the building to carry its loads. A gantry crane, by contrast, is entirely self-supporting; its legs carry the bridge beam down to ground level, so no structural connection to the building is required. This makes gantry cranes more flexible for outdoor use, temporary installations or facilities with insufficient structural capacity to support a conventional overhead crane. Overhead cranes generally offer higher capacities and better headroom efficiency, while gantry cranes offer lower installation costs and greater portability.
What Maintenance Does A Gantry Crane Require?
Gantry crane maintenance falls into three categories: pre-use checks, scheduled preventive maintenance and statutory thorough examination. Pre-use checks should be carried out by the operator before every lifting operation and cover structural integrity, hoist function, limit switches, brakes and the condition of hooks and rigging. Scheduled preventive maintenance, typically at intervals recommended by the manufacturer, covers lubrication of moving parts, inspection of wire ropes or chains for wear and deformation, checking of electrical connections and controls and examination of structural welds and bolted connections. Separately, LOLER 1998 requires a thorough examination by a competent person at least every 12 months for cranes not used to lift people, or every six months where people are lifted. Records must be retained and defects reported.
What Is Gantry Crane Wind Loading, And Why Does It Matter?
Wind loading is the lateral force exerted on a gantry crane structure by wind, and it is a critical design consideration for any crane operating outdoors. When a crane is in service and carrying a load, wind can introduce additional bending moments and overturning forces on the legs and base frame that were not present in the static dead load calculation. BS EN 13001 (Crane Safety General Design) sets out the methodology for calculating wind loads on crane structures, distinguishing between in-service wind speeds (typically up to 20 m/s) and out-of-service storm conditions (which can exceed 40 m/s). Outdoor gantry cranes must be fitted with storm brakes or rail clamps to resist travel under out-of-service wind conditions, and manufacturers must provide maximum permissible wind speeds for safe operation in the equipment documentation.
What Is A Thorough Examination Of A Gantry Crane Under LOLER?
A thorough examination is a statutory inspection of a gantry crane carried out by a competent person, required under the Lifting Operations and Lifting Equipment Regulations 1998 (LOLER). It goes beyond a routine maintenance check and involves a detailed examination of all load-bearing components, structural welds, connections, hoist mechanisms, brakes, limit switches, hooks and rigging to assess whether the crane remains safe for continued use at its rated capacity. For cranes not used to lift people, the examination must take place at least every 12 months; for cranes that lift people, at least every six months. Following examination, the competent person must provide a written report and, where a defect presents an existing or imminent risk, notify both the duty holder and the relevant enforcing authority under Regulation 10.
Do Gantry Crane Operators Need Training?
Yes. While there is no single mandatory licensing regime for gantry crane operators in the UK equivalent to, for example, forklift truck licensing, employers have a duty under the Health and Safety at Work Act 1974 and LOLER 1998 to ensure that lifting operations are carried out only by people who are adequately trained and competent. In practice, this means operators should receive formal training covering safe slinging and rigging, load assessment, pre-use inspection, crane controls, safe working load limits and emergency procedures. Training is available through providers accredited by bodies such as CPCS (Construction Plant Competence Scheme), LEEA (Lifting Equipment Engineers Association) and RTITB. Employers should keep records of operator training and review competency requirements whenever equipment or operating conditions change.
What Is A Spreader Beam, And When Is One Used With A Gantry Crane?
A spreader beam is a rigid lifting accessory that connects to the crane hook and provides two or more lifting points spaced horizontally apart, allowing long or awkward loads to be lifted without imposing inward compression forces on the load itself. They are used when a load is too long to lift safely from a single central point, or when vertical slings at an angle would exert damaging lateral forces, for example, when lifting steel fabrications, precast concrete sections, large panels or vessels. Spreader beams are themselves classified as lifting accessories under LOLER 1998 and the Supply of Machinery (Safety) Regulations, meaning they require a Declaration of Conformity, must be marked with their Safe Working Load and must be included in the thorough examination schedule alongside the crane.
What Is A Gantry Crane Risk Assessment, And What Should It Cover?
A gantry crane risk assessment is a systematic evaluation of the hazards associated with a planned lifting operation, required under the Management of Health and Safety at Work Regulations 1999 and supported by the LOLER 1998 requirement for lifting operations to be properly planned by a competent person. It should identify all foreseeable hazards, including overloading, load instability, personnel working beneath suspended loads, ground conditions, overhead obstructions and wind and specify the control measures to be applied. A thorough risk assessment for gantry crane use should confirm the crane’s rated SWL is sufficient for the task, verify the condition of all lifting accessories, establish an exclusion zone beneath the lift, define communication arrangements between the operator and banksman and set out emergency procedures. For complex or high-risk lifts, a formal lift plan document is best practice and may be required under CDM 2015.
What Is The Difference Between A Gantry Crane And A Jib Crane?
A gantry crane provides linear travel along a runway and can cover a rectangular working area beneath its bridge beam. A jib crane, by contrast, consists of a horizontal arm (the jib) mounted to a vertical mast or wall bracket, which rotates through an arc typically 180° to 360° rather than travelling in a straight line. Jib cranes serve a circular or semicircular working envelope and are well-suited to workstations where a single machine or assembly point needs to be served from above. Gantry cranes are better suited to applications requiring coverage of a larger rectangular area, or where loads need to be transferred between different points along a bay. The two types are sometimes used in combination, with a jib crane feeding loads to a gantry crane runway.
What Is A Gantry Crane Load Test, And When Is It Required?
A gantry crane load test is a controlled procedure in which the crane is subjected to a test load exceeding its rated Safe Working Load in order to verify that the structure, hoist mechanism and all supporting components can withstand the forces imposed in service. Under BS EN 15011 and the Supply of Machinery (Safety) Regulations 2008, new gantry cranes must undergo a static proof load test at 125% of the rated SWL and a dynamic load test at 110% of the rated SWL before being placed into service for the first time. The static test confirms structural integrity and permanent deformation limits; the dynamic test verifies the performance of brakes, limit switches and motion controls under realistic operating loads. Load testing is also required following significant repair, modification or any incident that may have compromised the crane’s structural integrity. The test must be witnessed and certified by a competent person and the resulting test certificate should be retained as part of the crane’s examination and maintenance records in accordance with LOLER 1998.
Have Even More Gantry Questions For Our Team, Or Are You Looking To Place An Order?
If gantry cranes are on your mind because you are wondering if they can improve safety and productivity for your facility, or if you are looking to make a purchase, our team is here to help.
Metreel is headquartered in Derbyshire, and we supply material handling products across the UK. We serve a wide variety of industries, from construction to manufacturing and beyond.
To discuss your gantry crane requirements with our team, please send us a message or give us a call on 0115 647 0437.