Single Girder Gantry Crane: Definition and Application Scope
Single Girder Gantry Crane is a gantry lifting equipment adopting a box-type single main beam modular structure. Its rated load ranges from 1 to 32 tons, suitable for A3/A4 medium intermittent duty, and it is specially designed for hoisting, stacking and transferring small and medium-sized materials outdoors. Featuring a compact overall structure, light dead weight and small wheel load, the crane imposes low requirements on factory ground foundations. It can be perfectly applied to the renovation of old factories and newly built small and medium-sized industrial yards, serving as a standardized solution for lightweight industrial lifting operations.
Precise Application Boundaries (Core Procurement Judgment Criteria):
Suitable scenarios: Outdoor hoisting operations within 32 tons, intermittent work and medium-low frequency usage; factories with controllable budgets and limited basic load-bearing capacity.
Unsuitable scenarios: Heavy-load operations over 32 tons, 24-hour continuous high-frequency work, and heavy-duty working conditions with high impact (double-girder gantry cranes are preferred for such cases).
Two major mainstream model categories, match working conditions as needed to avoid pitfalls
Rail-mounted Single Girder Gantry Crane (For Fixed Working Conditions)
The equipment travels directionally along pre-embedded steel rails, featuring stable transmission, high positioning accuracy, low energy consumption and extremely low failure rate, and supports long-term regular operation. Equipped with standard wind-proof rail clamps and wind speed alarm interlocking devices, it delivers excellent safety for outdoor operations.
Applicable scenarios: Stone block yards with permanently fixed layouts, steel storage bases, prefabricated component industrial parks, and standardized outdoor processing plants.
Trackless Rubber-tyred Single Girder Gantry Crane (For Flexible Working Conditions)
It adopts heavy-duty solid rubber travelling tyres. No steel rail laying or large-scale civil reconstruction is required. It can freely transfer and operate across zones on the entire hardened floor, boasting ultra-high site utilization and lower short-term investment costs.
Applicable scenarios: Phased engineering projects, temporary transfer yards, factories with frequently adjusted layouts, and track retrofitting projects for old factories.
Selection Guide for Core Parameters
Most procurement errors stem from blind parameter matching. Professional engineers specializing in mining hoisting have summarized five core parameters that must be verified to help you accurately avoid selection deviations:
Rated Load Capacity
Covers regular capacities from 1 tonne to 32 tonnes. A 1.2-fold safety margin shall be reserved during model selection. Normal operation under full load or overloaded conditions is strictly prohibited. For working conditions with significant fluctuations in material weight, upgrade to the next higher tonnage priority to prevent accelerated equipment aging caused by long-term high-load operation.
Span and Lifting Height
The span is customized according to the effective operating width of the plant area to avoid structural redundancy and higher construction costs caused by an excessively large span, or failure to cover the operating area due to an overly small span. The lifting height shall be comprehensively calculated based on the stacking layers, clear height of the workshop and the height of loading and unloading equipment, with safe anti-collision clearance reserved.
Work Level
Standard configuration is Class A3/A4, suitable for intermittent operation within 8 hours. For working conditions featuring frequent daily start-stop cycles and long-duration continuous operation, an upgrade to Class A5 is required to enhance the load-bearing capacity of the main girder, hoist and travelling mechanism.
Drive and Electronic Control Configuration
The basic model adopts conventional contactor control and is suitable for low-frequency operations. For working conditions requiring high frequency, high precision and anti-sway performance, it is recommended to select a variable frequency speed control system to realize soft start and soft stop, eliminate load swinging, and reduce damage to workpieces and impact on equipment.
Anti-corrosion and Protection Grade
General inland factories adopt conventional anti-corrosion processes; factories with heavy dust, frequent rainfall and humid conditions are upgraded with heavy-duty anti-corrosion coatings. For coastal environments with salt spray and environments with mild chemical corrosion, marine-grade anti-corrosion solutions are selected. The electrical systems are equipped with standard IP54 dustproof and waterproof protection, suitable for harsh outdoor working conditions.
Acceptance Standards and After-sales Guarantee Specifications of Henan Mine
1. Key Points for Standard Acceptance
After equipment installation, verify the stable operation of the whole machine, sensitivity of limit devices, effectiveness of overload protection and reliability of windproof devices. Conduct trial hoisting tests under no-load, half-load, full-load and overload conditions. Sort out drawings, qualification certificates, inspection reports and inspection application documents simultaneously to ensure smooth acceptance by safety supervision authorities.
2. Long-term After-sales Support
Equipment from formal large manufacturers comes with a standard 1-year warranty for the whole machine, and an extended warranty for core hoisting components. We maintain after-sales service outlets nationwide, provide on-site maintenance within 48 hours, lifelong technical guidance and supply of original spare parts to eliminate worries about subsequent equipment operation and maintenance.
Mining Crane Group has specialized in the R&D and manufacturing of gantry lifting equipment for more than 20 years. It provides one-stop full-process services including free load checking, working condition matching, customized solutions, installation and acceptance, as well as after-sales maintenance. Customized exclusive lifting solutions are offered in accordance with enterprises' actual working conditions. All equipment comes with complete and verifiable qualifications compliant with regulations, suitable for the implementation of various industrial projects at home and abroad.
Please contact Chloe for a free quotation and professional advice.
Tel: +86 18238799707 (Same number for WhatsApp)
Email:sales07@minehenancranes.com
FAQs
Q1: How to choose between single-girder gantry cranes and double-girder gantry cranes?
Select a single-girder gantry crane for loads within 32 tons, intermittent routine operations and limited budgets. For loads over 32 tons, 24-hour continuous heavy-duty operations, and working conditions requiring high precision and frequent operation, a double-girder gantry crane is preferred.
Q2: What are the ground requirements for trackless gantry cranes?
A hardened reinforced concrete floor is required to meet the wheel load bearing requirements of the equipment. The floor shall be flat without steep slopes or pits. Trackless models are not recommended for soft and unhardened sites.
Q3: Is it necessary to install wind protection devices for outdoor use?
Rail-mounted models permanently installed outdoors must be equipped with wind-proof rail clamps and wind speed alarm devices. Automatic interlock shutdown shall be triggered in strong wind conditions to eliminate safety risks such as crane sliding.
Q4: Can the equipment be customized to non-standard specifications?
Full-dimensional non-standard customization is available for span, lifting height, tonnage, electric control system, anti-corrosion grade and lifting gear types to adapt to various differentiated industrial working conditions.