RMG vs RTG Container رافعة: Which for Your Terminal

RMG vs RTG Container رافعة: Which for Your Terminal

If you are specifying container handling equipment for a rail yard, inland depot, or small-to-mid port, the RMG versus RTG decision usually comes down to two variables: how many containers you move per day, and whether you can pour concrete rails. This article compares rail-mounted gantry (RMG) and rubber-tyred gantry (RTG) cranes on throughput, cost, and site fit — with the practical numbers buyers actually need.

The Core Difference in One Paragraph

An RMG crane runs on fixed steel rails embedded in the yard surface. It cannot leave its lane, but it is faster, more precise, and cheaper to automate. An RTG crane runs on rubber tyres and can steer between blocks, giving layout flexibility at the cost of higher wheel loads, higher fuel/maintenance spend, and lower positioning accuracy. كرين تشون هوا builds both under the gantry category — the RMG rail-mounted container gantry for high-density yards and the MG double-girder gantry platform for general heavy lifting alongside container work.

Throughput: Where RMG Wins

RMG cranes عادةً achieve 25–35 moves per hour in a single-container spreader configuration, versus 18–25 moves per hour for a comparable RTG. The gap comes from three factors:

• No tyre deflection. Rail guidance eliminates sway and crabbing, so the trolley positions faster and the spreader lands cleaner. Cycle times drop by roughly 15–20%.
• Higher travel speed. RMG long-travel and trolley speeds are not limited by rubber friction or steering geometry.
• Automation readiness. Fixed rails allow repeatable positioning, which is why most automated container yards use RMG, not RTG. Chunhua's QDS smart unmanned control platform (5–150T class, derived from the QD double-girder line) can be specified on RMG structures for semi- or full-automation.

For a terminal moving under about 150,000 TEU per year, an RTG fleet is usually adequate. Above that, or where you run 24/7 with tight berth windows, RMG throughput per hectare is materially better because blocks can be narrower and stacked higher.

Cost: Capital, Civil, and Operating

The purchase price of an RTG is often 10–20% lower than an equivalent RMG, but that is not the full picture.

• Civil works. RMG requires rail foundations, drainage, and a level yard — a real capital cost. RTG needs a paved, load-bearing surface but no rails. If your yard is already paved and you cannot shut it down for rail installation, RTG avoids that disruption.
• Operating cost. RTG burns diesel (or runs on cable reel/hybrid). RMG is almost always electric, with far lower energy cost per move and fewer wearing parts — no tyres, no steering linkages, no diesel engine service.
• Tyre cost. A large RTG set can run into tens of thousands of dollars per replacement cycle. RMG wheels last years.
• Maintenance labour. RMG has fewer consumables, so annual maintenance spend is عادةً lower even before automation.

Rule of thumb: if your terminal life is under 10 years or throughput is modest, RTG's lower upfront and civil cost wins. If you are building for 15–20 years at high density, RMG's total cost of ownership is lower.

Site and Layout Considerations

Choose RMG when:

• You have a rectangular, dedicated container block with stable subgrade.
• You stack 5–6 high and want narrow aisles.
• You plan automation or remote operation.
• You have reliable grid power.

Choose RTG when:

• Yard layout may change, or blocks are irregular.
• You need to move the crane between separated areas.
• Rail installation would disrupt live operations.
• Power infrastructure is limited and diesel is practical.

For shipbuilding and heavy fabrication yards, a shipbuilding gantry crane or MG double-girder gantry (5–50T) often does double duty for both container and oversized lifts — worth considering if your cargo mix is not pure containers.

Specification Notes for Buyers

Whichever type you choose, fix these before quoting:

• السعة and outreach: RMG/RTG spans commonly run 20–40 m; confirm the number of container rows plus truck lane.
• ارتفاع الرفع: state stack height (1-over-5, 1-over-6) plus clearance.
• Duty class: container cranes are عادةً A7/A8 under GB/T 3811. Confirm the classification, not just the tonnage.
• Standards: Chunhua designs to GB/T 3811, with FEM 1.001 / DIN 15018 / CMAA #70 available on request for export markets.
• Components: specify Schneider, Siemens, ABB, or SEW drives and controls for spares availability in your region.
• Steel: Q345B for primary structure, Q235B for secondary — confirm in the technical agreement.

شهادة: Chunhua، WhatsApp، CE، CCC، SGS، T/T، L/C، USD، QD، LH، MGH، YZ، LB and Export Practicalities

For cross-border procurement, confirm the certification path early. كرين تشون هوا supplies CE, CCC, EAC (TR CU 010/020), GCC/SASO, SONCAP, and KEBS depending on destination. There is no MOQ, quotes are returned within a 4-hour SLA, production runs 30–45 days, and equipment carries a 12-month warranty. The manufacturing base is in Hefei, Anhui — China's industrial crane manufacturing belt — through Hefei Chunhua Hoisting Machinery Co., Ltd (founded 2003), serving 60+ countries across 5 فئات المنتجات and 81 standard models.

Bottom Line

Pick RMG for high-throughput, high-density, long-life yards where automation and low energy cost matter. Pick RTG for flexible layouts, lower upfront spend, and yards where rail installation is impractical. If your volumes sit in the middle, run the numbers on total cost of ownership over your terminal's design life — not just the purchase order.

To discuss a specific RMG or RTG configuration, contact كرين تشون هوا on واتساب at +86 193 9277 7259 or email yuhua0095@gmail.com with your span, stack height, and daily move target.