From 250 kilograms to 160 tonnes — single girder, double girder, gantry, process and ATEX. This page is the map: work out which type your building needs, then go straight to it.
An overhead crane — also called a bridge crane or EOT (electric overhead travelling) crane — is a lifting machine carried on a bridge that travels along a runway above the working area. The bridge crosses the building, a trolley moves along the bridge, and the hoist lifts. Because it works overhead, the floor stays clear.
There are five families, and the one you need is usually decided by your building rather than by your preference.
One main girder, the lighter and more economical structure. Right for light to medium duty in a building that already has a runway or can take one.
Single girder overhead crane →The trolley runs on top of two girders, reaching greater lifting height and much higher capacity. It takes an operator cab, a walkway or a special attachment, and it is the structure for heavy or continuous work.
Double girder overhead crane →The crane stands on its own legs and runs on floor rails, so it needs no building steel at all. The answer for an open yard, or for a hall whose structure will not carry a runway.
Gantry crane →One side runs on an existing runway or wall bracket, the other on a leg at floor level. It solves the case where only half the building can carry the load.
Semi-gantry crane →A crane designed around a process rather than around a load: ladle or lifting-beam work, high duty classes, hot or aggressive environments.
Process crane →On top of those, any of them can be engineered as an explosion-protected (ATEX) crane where the atmosphere is explosive.
Type selection
Almost every crane specification comes down to four questions, in this order.
If your building steel can take a runway, the crane hangs from the building and you are choosing between single and double girder. If it cannot, or the work is outdoors, the crane carries itself and you are looking at a gantry or semi-gantry. This decision comes first because it changes everything after it.
Capacity and span are not independent. A longer span lowers the capacity a given girder can carry, which is why we calculate the pairing per project rather than publishing a fixed matrix. Lifting height comes with them, set by your building and any pit below the floor.
This is the duty class, and it is the decision most often got wrong. It is explained in the next section because it deserves more than a line.
Heat, dust, corrosive air, food or pharmaceutical hygiene, or an explosive atmosphere — each changes materials, protection and sometimes the whole certification route. An ATEX requirement in particular is not an option added later; it shapes the design from the first calculation.
The duty class is not a measure of how heavy your load is. It is a measure of how hard the crane works: your load spectrum — how often it lifts near capacity rather than well below it — combined with how many hours it actually runs.
That is why two cranes with the same 20-tonne rating can be completely different machines. One lifting 20 tonnes twice a shift is a light-duty crane. One lifting close to 20 tonnes every few minutes across three shifts, or in continuous process duty, is a high-duty crane, and it needs more steel, a bigger drum, a different motor rating and a shorter maintenance interval.
Get it wrong in the specification and the crane does not fail on day one. It fails years early, usually in the lifting machine, and the cost lands as unplanned downtime rather than as a capital line.
We size the class to your real cycle, and we state it in the documentation so it is verifiable rather than assumed. Our range runs from FEM 1Bm (ISO M3) to FEM 5m (ISO M8). There is a fuller explanation in the duty class guide.
Technical data
Read each value with its consequence — that is how the crane is actually sized for your building.
Our range covers 250 kg to 160 tonnes as a standard selection; above 160 t we engineer per project. Single girder cranes run to 12 tonnes as a standard selection, with a 30 m span as standard and lifting height to 30 m; above 12 t they are engineered per project. Double girder cranes run to 160 tonnes, reaching 32 m span at 100 t, with lifting height to 30 m. Gantry and semi-gantry cranes cover 12 tonnes on a single girder and 160 tonnes on a double girder, with spans of 32 m as standard.
Every one of those pairings is a maximum in one direction, not a matrix. The combination your building can actually run is calculated for your project.
Our cranes are built for −10 to +50 °C ambient as standard, with motors and panels at IP54 / IP55 for dusty and damp industrial environments. Beyond that band the environment starts to drive the design.
Hot work — ladle handling, furnace charging, foundry cycles — moves you towards a process crane, where the heat, the cycle and the load spectrum are designed for together rather than treated as an option. Explosive atmospheres take you to an explosion-protected (ATEX) crane, engineered for gas Zone 1–2 and dust Zone 21–22 against the specific code on your site.
Applications
The crane follows the industry's lifting condition. Steel and metal service handles coil, billet and ladle at high duty. Foundries run hot loads on continuous cycles. Cement, energy and mining add dust and long hook paths. Shipyards and ports work long spans outdoors. Automotive, machine building, packaging and food handle lighter loads where accuracy and uptime matter more than tonnage. Chemical, petrochemical and pharmaceutical sites add the atmosphere on top.
Equipment
An overload switch and load cell come as standard on every crane we build.
Soft starts and stops, reduced load sway, less shock into the structure and the runway.
Position memory, target positioning and anti-sway for repeatable moves, with the operator in control; see automated crane systems.
Made in-house, fixed or travelling with the trolley; one control option alongside pendant and radio remote.
Radio remote, pendant, inverter-based anti-sway and safety devices.
Usage, condition and maintenance data from the crane itself.
Every serious maker builds an overhead crane. What differs is how much of it they actually make, and who is still there in year fifteen.
The lifting machine is built in our own plant alongside the steel structure, the end carriages and wheel groups, and the operator cab. That means one team is accountable for the whole crane, and when you need service, a spare part or a modernisation years later, you are talking to the people who made it.
After-sales
FAQ
Yes. EOT stands for electric overhead travelling crane, and it is the term used most in Gulf and EPC specifications. Overhead crane, bridge crane and overhead travelling crane all describe the same machine: a bridge that travels along a runway above the working area, carrying a trolley and a hoist.
Single girder and double girder cranes hang from a runway on your building steel. Gantry and semi-gantry cranes carry themselves on legs, so they need no building steel. Process cranes are designed around a process rather than a load. Any of them can be engineered as an ATEX version for an explosive atmosphere. Which one you need is usually decided by your building.
They are two different structures, not two rungs of the same ladder. A single girder carries light to medium duty with less structure and less cost. A double girder is the answer when the load passes roughly 10 to 20 tonnes, when the span is long, when you need more hook path under the same roof, when the crane runs multi-shift cycles, or when an operator cabin, a maintenance walkway or purpose-built below-hook equipment has to sit on the crane.
The duty class describes how hard the crane works — your load spectrum combined with running hours — rather than how heavy the load is. Two cranes with the same rating can be entirely different machines because of it. A class set too low does not fail immediately; it fails years early, usually in the lifting machine. See the duty class guide.
Technical data
| Type | What carries it | Capacity | Span | Choose it when |
|---|---|---|---|---|
| Single girder | Runway on building steel | 250 kg – 12 t | 30 m as standard | Light to medium duty; economy matters |
| Double girder | Runway on building steel | 250 kg–160 t | 32 m at 100 t, as standard | Heavy loads, long hook path, cab or attachment |
| Gantry | Its own legs on floor rails | 12 t single / 160 t double | 32 m as standard | No building steel, or the work is outdoors |
| Semi-gantry | One runway, one leg | 12 t single / 160 t double | 32 m as standard | Only one side of the building can carry it |
| Process crane | Either | Per project | Per project | The process, not just the load, drives the design |
| Explosion-protected (ATEX) | Either | Per project | Per project | Gas Zone 1–2 or dust Zone 21–22 |
| Parameter | Value | Consequence / note |
|---|---|---|
| Overall capacity band | 250 kg – 160 t | Workshop spot lifting to heavy process duty |
| Single girder | 250 kg – 12 t · 30 m span as standard · 30 m lifting height | The economical structure for light to medium duty |
| Double girder | 250 kg–160 t · 32 m span at 100 t as standard · 30 m lifting height | Heavy loads, longest hook path, cab and attachments |
| Gantry / semi-gantry | Single girder 12 t · double girder 160 t · 32 m span as standard | Carries itself; no runway on the building |
| Duty class | FEM 1Bm–5m (ISO M3–M8), per project | Sized to load spectrum × running hours |
| Hoisting speed | Stepless, inverter-controlled — 0–4 m/min standard, coming down to 0–2.3 m/min at the top of the range | Standard crane speeds; micro-speed for accurate setting |
| Motion control | Inverter (VFD) | Soft start/stop, reduced sway, gentler on the structure |
| Power supply | 380–415 V / 50 Hz (60 Hz for export) | Matches local and export grids |
| Protection class | IP54 / IP55 (motor + panel) | Dust and moisture protection for industrial environments |
| Ambient temperature | −10 … +50 °C | Cold-store to hot-process ranges |
| Control | Radio remote / pendant / operator cab | Operator cab made in-house |
| Overload protection | Overload switch + load cell, standard | The crane refuses a lift beyond its rating |
| Standards | EN 13001 series · EN 15011 · EN 14492-2 · EN ISO 13849-1 / -2 · EN IEC 60204-32 · FEM 9.511 (complementary) · CE · ISO 9001 | Duty class stated per project |
| Directives | 2006/42/EC · 2014/30/EU · 2014/35/EU · 2000/14/EC. Machinery Regulation (EU) 2023/1230 applies from 20 January 2027; our compliance work for it is complete | The CE route today, and what replaces it |
| FEM (mechanism) | ISO M | Typical use | What it usually means in practice |
|---|---|---|---|
| 1Bm | M3 | Light, single shift | Occasional lifting well below capacity |
| 2m | M5 | Medium/heavy, 1–2 shifts | Regular lifting, mixed load spectrum |
| 4m | M7 | Very heavy, 2–3 shifts | Near capacity, most of the working day |
| 5m | M8 | Continuous / severe | Process cycles that never stop |
Get a recommendation
Send us the load, the span, the duty cycle and the environment. An engineer confirms the structure and the duty class with you before anything is quoted — no obligation.
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Designed and built to EN, FEM and ISO standards · CE marked · duty class defined per project (our build range: FEM 1Bm–5m / ISO M3–M8) · manufacturing in İzmir since 2004
