A single girder crane in the 2 to 32 ton range, with spans up to 35 m and hook lifts not exceeding 24 m, covers the bulk of farm and small-aggregate handling tasks that used to need a forklift or a telehandler [S1][S2].
Agricultural buyers in 2026 most often land on three configurations: 3 to 5 t underslung units for machinery sheds, 5 to 10 t top-running MH box-type for grain stores, and 10 to 20 t European-style electric units for larger dairy, feed-mill, or cooperative-scale facilities [S2][S3].
Where a Single Girder Crane Fits on a Farm
Single girder designs work best where lifting height does not exceed 24 m, the span sits between 8 m and 32 m, and the budget cannot absorb a double-girder structure [S1]. On a working farm that means grain store loading, machinery shed servicing, hay bale handling, livestock building maintenance, and feed-mill intake bays, rather than bulk-port container moves. Top running or underslung girder arrangements are both available, with spans up to 35 m and safe working loads up to 20 t offered in mainstream product lines [S2].
For tall barn conversions or high-sided grain silos, hook headroom is the make-or-break parameter, since the single beam keeps the hoist close to the underside of the girder and frees vertical space versus a double-girder design. A typical single girder crane also weighs 20 to 30 percent less than an equivalent double-girder unit, which lowers runway beam sizing in retrofitted farm buildings with limited structural headroom.
Capacity, Span, and Duty Class Decision Boundaries
Most farm applications sit between 2 t and 10 t SWL, with 5 t being a common sweet spot: it lifts a fully loaded pallet of seed or fertilizer, a small baler, or a tractor three-point attachment without oversizing the runway. At 5 t, a 16 m span and a 6 m lift is a realistic working envelope, matching a 2026 Nucleon Cranes installation in Poland that operates under A5 duty with inverter-controlled hoist travel of 2 to 20 m/min and crane travel of 3 to 30 m/min [S5].
Duty class is the variable farms underestimate. A workshop crane that lifts a gearbox twice a week is a C3 or A3 duty; a grain-store crane that cycles every 20 minutes through harvest is at least A5, and a feed mill running two shifts is A6. The hoist lifting speed on the Poland reference unit is 5/0.8 m/min (fast/slow), running on 380 V, 50 Hz three-phase with IP54 motor protection, a baseline that most farm electrical supplies can match with a transformer or a genset [S5]. For seasonal peaks, A5 is the realistic minimum; below that, the gearbox will fail inside three to five harvest cycles.
MH Box-Type vs European-Style vs Truss: A Criteria Comparison
Three single girder sub-types dominate farm procurement, and the choice is driven by span, environment, and frequency rather than nameplate tonnage: [S1]
1. MH box-type (welded rectangular steel box section): high bending stiffness and torsional resistance, sealed profile keeps dust and chaff out, preferred for long spans above 18 m and dusty grain-store environments. It is the most structurally capable variant in the single girder range and retains integrity better than open-truss alternatives near heat-generating processes [S1].
2. European-style electric single girder: compact structure, low headroom, high efficiency, and stable performance, optimized for clean indoor duty in workshops, dairy processing, and feed mills where headroom is tight and finish matters [S3].
3. Light-duty truss or L-type: lower cost, open frame, suited to short spans below 12 m and intermittent outdoor use such as machinery shed or log store, but not specified for dust-laden or high-cycle environments.
Across cost, headroom, dust resistance, and span, the box-type wins on span and dust, the European-style wins on headroom and precision, and the truss wins on first cost for short, low-duty spans.
Power Supply, Control, and Outdoor Duty Considerations
Farm electrical infrastructure is rarely three-phase as standard, so the supply question needs an early answer. Reference 2026 European installations use 380 V or 400 V, 50 Hz, three-phase, with IP54 motor enclosures as the typical protection level [S5]. Wireless remote control is now standard on A5-duty farm units, replacing pendant lines that snag on bale stacks and livestock race rails.
For outdoor gantry applications such as timber yards, fertilizer barns, or silage clamps, a gantry crane configuration removes the need for a building-supported runway and lets the crane sit on ground-level rails or rubber-tyred bogies, available in capacities from under 1 t for portable workshop models to over 1,000 t for heavy industrial applications [S4]. For mobile yard work without rails, a mobile crane can substitute where the lifting is occasional rather than continuous.
Selection Checklist Before Order
Lock these parameters before talking to a supplier: SWL (typical and peak load), span between runway centres, hook lift required, building headroom, duty class (A3 to A6), power supply phase and voltage, control preference (pendant, radio, or cab), indoor or outdoor, and any dust or corrosion exposure from grain dust, ammonia, or fertilizer. The 2026 European reference unit cited a 5 t SWL, 16 m span, 6 m lift, A5 duty, 380 V 50 Hz supply, wireless remote, and IP54 protection as a working farm-class spec [S5].
Verify that the manufacturer documents compliance with the relevant FEM/ISO duty classification and that the hoist, end-carriage, and travel drives carry matching ratings, since mismatched sub-components are the most common cause of premature farm-crane failure. For automated or large-warehouse cooperatives, comparing alongside an AS/RS storage system is worthwhile if pallet throughput is the real driver. Buyers handling bulk aggregates should also review a quarry-focused single girder spec comparison for higher-duty reference points.
Limitations and When Not to Specify a Single Girder
Single girder designs are not the right call above 32 t, above 35 m span, or where the building headroom demands a trolley hoist mounted above the girder with very high hook travel, where a double-girder configuration becomes structurally and economically necessary [S1]. They are also a poor fit for true bulk-material grabs or magnet duty, where a dedicated double-girder or four-girder crane with magnetic or grab-specific beams is standard. Workshop height, not tonnage, is the dominant switch from single to double girder: where headroom limits hook travel on a single beam, the spec must move up [S6].
Agricultural operators should also resist over-specifying a single girder to cover occasional peak loads. A 2 t seasonal peak on a 5 t base spec is acceptable; a 15 t peak on a 10 t single girder is a structural overstress, not a duty-cycle problem, and the right answer is a higher-capacity hoist on a structurally adequate double girder, not a re-rated single beam.
Closing reference node: track the FEM 1.001 / ISO 4301 duty-class definitions applied to A5 farm-service cranes, and confirm whether the supplier publishes end-carriage wheel-load data for the proposed runway beam, since most farm building columns are not designed for crane-class point loads and the runway often governs the whole retrofit budget. A 2026 standard supply baseline worth pinning to every farm RFQ is 380 to 400 V, 50 Hz, three-phase, IP54 motor enclosure, and wireless remote as a minimum configuration [S5].