নেভিগেশন মেনু
300 ton double girder gantry crane for shipyards, steel plants and precast yards. Box-girder design, 18–89 m span, সম্পূর্ণরূপে কাস্টমাইজযোগ্য. একটি বিনামূল্যে উদ্ধৃতি পান.
When your operation needs to move loads of 300 টন বা তার বেশি, day after day, a standard overhead crane is no longer enough. দ্য 300 ton double girder gantry crane is a heavy-duty lifting system engineered for exactly this job: two parallel box girders supported by floor-mounted legs, with a trolley that travels along the girders and hoists loads rated up to 300 মেট্রিক টন.
300 ton double girder gantry crane
Its double-girder structure delivers the rigidity, stability and headroom that single-girder designs cannot offer at this capacity. That is why it is the industry-standard solution in shipbuilding, steel processing, precast concrete production, bridge construction and heavy machinery assembly — anywhere that large, expensive loads must be handled with precision and safety.
একটি গ্যান্ট্রি ক্রেন (পোর্টাল ক্রেনও বলা হয়) is a bridge crane whose main girders are carried by legs that run on ground-level rails, instead of being mounted on building walls or columns. The “double girder” configuration uses two parallel main girders, which allows a heavier rated capacity, greater hook travel height, and better stability than a single-girder design.
300+300 ton double girder gantry crane
A typical 300 t gantry crane consists of:
The crane handles loads through the main hook, while the auxiliary hook lifts smaller loads or flips and positions workpieces — so a single machine covers a full range of lifting tasks.
The table below shows typical configurations. Every parameter — span, উত্তোলন উচ্চতা, speeds, duty class and control mode — is fully customizable to your site and application.
| প্যারামিটার | সাধারণ পরিসীমা / মান |
|---|---|
| রেট উত্তোলন ক্ষমতা (প্রধান হুক) | 300 টি |
| Auxiliary hook capacity | 50–80 t (al চ্ছিক) |
| স্প্যান (distance between rails) | 18–40 m standard; 50–89 m for shipyard models (custom up to ~185 m for large yards) |
| উচ্চতা উত্তোলন | 12–30 m standard; পর্যন্ত 76 m for shipbuilding applications |
| Duty class | A3–A5 (M3–M5 per ISO/FEM classification) |
| Main girder type | Box-type welded structure, Q355B low-alloy steel |
| Design standards | ফেম, আইএসও, জিবি, থেকে; CE documentation available on request |
| কন্ট্রোল মোড | কেবিন, দুল, বা বেতার রিমোট কন্ট্রোল |
| পাওয়ার সাপ্লাই | 380 V/50 Hz, 415 V/50 Hz, 480 V/60 Hz, বা কাস্টম |
1. Box-Type Main Girders
The two main girders are the heart of the crane. They are fabricated from Q355B low-alloy structural steel, welded with automatic submerged arc welding, and then stress-relief annealed to remove internal welding stress. This prevents deformation during long-term heavy-load operation. The girder cross-section is optimized with finite element analysis (FEA) to balance dead weight and load capacity, which means high rigidity and low deflection — critical for accurate positioning of 300-ton loads.
2. Trolley with Main and Auxiliary Hoists
The trolley carries the main hoist (300 টি) and an auxiliary hoist. Heavy-duty hoisting mechanisms are designed for smooth, controlled lifting with reliable braking. Variable-frequency drive (ভিএফডি) is available for stepless, jerk-free speed control on hoisting, trolley travel and crane travel.
300 ton double girder gantry crane
3. Legs and End Carriages
The girders are supported by A-frame or U-frame box legs that give the crane a wide, stable base — essential for outdoor operation in wind. The end carriages use an integrated box structure with a three-in-one motor-reducer-brake drive unit, ensuring smooth and reliable travel along the rail.
4. Electrical and Safety Systems
প্রতিটি 300 t gantry crane is fitted with comprehensive protection, সহ:
The crane is designed in compliance with international crane standards, FEM সহ, আইএসও, DIN and GB, and can be supplied with CE documentation for European projects. The duty class (A3–A5 / M3–M5) is selected according to your actual workload — the number of operating hours per day and the frequency of full-load lifts — so you never pay for unnecessary capacity, and you never undersize the structure.
300 ton double girder gantry crane
| ফ্যাক্টর | ডাবল গার্ডার | একক গার্ডার |
|---|---|---|
| রেটেড ক্ষমতা | সাধারণত 50 t থেকে 500 t+ | Typically up to 20–32 t |
| Stability and rigidity | উচ্চতর, with lower deflection | Adequate for light duty |
| Hook lifting height | Higher hook position, better use of headroom | Limited by the girder position |
| Dual-hook operation | Main + auxiliary hoist standard | Single hoist, limited options |
| Best suited for | Heavy industry, শিপইয়ার্ড, ইস্পাত গাছপালা | কর্মশালা, light storage yards |
For 300-ton applications, a double girder design is the only practical choice.
দ্য 300 ton double girder gantry crane is widely used in:
প্রতিটি 300 t gantry crane is engineered for its site. Common customization includes:
Before requesting a quote, prepare the following information:
A reputable manufacturer will provide a design drawing, load chart and FEM/ISO calculation report before production, and full after-sales support with spare parts and installation guidance.
Weihua কারখানা
প্রশ্ন ১: How much does a 300 ton double girder gantry crane cost?
ক: The price depends mainly on span, উত্তোলন উচ্চতা, ডিউটি ক্লাস, control mode and optional equipment. Because every heavy gantry crane is engineered to order, suppliers quote per project — contact us with your requirements for a detailed quotation.
প্রশ্ন ২: What is the difference between a gantry crane and an overhead crane?
ক: An overhead crane runs on rails mounted on building walls or columns, while a gantry crane stands on its own legs and runs on ground-level rails. Gantry cranes are ideal for outdoor yards and sites without runway support structures.
Q3: স্প্যান এবং উত্তোলন উচ্চতা কাস্টমাইজ করা যেতে পারে??
ক: হ্যাঁ. Standard spans are typically 18–40 m, and shipyard models can reach 89 m or more. Lifting height is customized according to your site, পর্যন্ত 76 m in shipbuilding applications.
Q4: What standards does the crane comply with?
ক: The crane is designed to FEM, আইএসও, DIN and GB standards, with CE documentation available for European projects. Duty class is selected based on your actual workload.
প্রশ্ন5: How long is the delivery time?
ক: Delivery depends on configuration and production schedule. Heavy-duty cranes are typically manufactured to order — confirm the lead time with your supplier when you place the order.
ক 300 ton double girder gantry crane is a long-term investment in your production capacity. Choose a manufacturer that provides custom engineering, FEM-verified design, quality manufacturing and reliable after-sales service. Send us your load, span and lifting-height requirements — our engineers will reply within 24 hours with a design proposal and quotation.
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