Dual Hoist Underhung Crane 5t + 3t S15.24m | 6t End Beam

This crane carries two NR electric hoists on one girder — an NHS 5 ton hoist and an NRC 3 ton hoist — to give the operator two independent lifting points on a single crane. This configuration is chosen because:

• Two lifting points, one crane: Instead of buying two separate cranes, one crane can serve two lifting positions along the same girder
• Flexible capacity: The 5t hoist handles heavy lifts, while the 3t hoist handles lighter, faster lifts — maximizing productivity
• Long load handling: Two hoists spaced along the girder can lift a long load at two points for better stability
• Cost efficiency: One crane with two hoists is generally more economical than two separate cranes with their own runways
• Shared runway: Both hoists use the same runway beam and end beam, saving runway and building structure cost

Each hoist travels independently along the girder (2.0~20 m/min hoist travel) and lifts at 0.8/5.0 m/min, so the operator can position them separately or use them together.

The long travel and end beam are rated 6 tons even though the hoists are 5t and 3t, because the end beam must safely carry:

• The heaviest single hoist lift: The 5 ton hoist plus its own hoist and trolley deadweight
• The combined deadweight of both hoists: The 5t and 3t hoists, plus their trolleys, sit on the same girder simultaneously
• Dynamic forces during travel: Acceleration, braking, and skewing add dynamic load on the end beam
• Safety margin: The 6t rating provides a conservative safety margin above the 5t working load

This is a deliberate design decision: the girder and end beam are sized for the worst-case combination of hoist deadweight, live load, and dynamic forces — not simply the sum of the two hoist capacities. Do not reduce the end beam rating without a full engineering recalculation.

Eight numbers on this dual hoist underhung crane drawing must match your workshop, or the crane will not fit or operate correctly:

If any of these differ from your workshop, tell Yuantai before ordering — each change affects price and lead time on the dual hoist underhung crane.

This crane uses two different NR electric hoist models:

• NHS (5 ton hoist): The heavier hoist for the main 5t lifts; positioned along the girder as needed
• NRC (3 ton hoist): The lighter hoist for faster, lighter lifts; also travels independently along the girder

Both hoists share the same lifting speed (0.8/5.0 m/min) and hoist travel speed (2.0~20 m/min), and both use a 0.4kW hoist travel motor. Using two different NR hoist models lets the crane match the right hoist to each lifting task while keeping both on one girder and one runway.

150~400mm rail width is specified for this dual hoist underhung crane because:

• Wheel diameter Ø140mm — the wheel is designed to run on 150~400mm rail width
• Two hoists and 6t rated travel: The load moment is higher than a single-hoist crane, so the rail must handle a greater wheel load
• Underhung crane design: The rail must support the end beam running on the bottom flange
• Standard availability: 150~400mm rail width is common for underhung cranes, easy to source and replace
• Long service life: 150~400mm rail is standard for 5t+ underhung cranes in continuous use

Do not substitute a narrower rail without recalculating the wheel load and dynamic forces. The Ø140mm wheel and 54.6 kN wheel load require 150~400mm rail width or equivalent.

No — this dual hoist underhung crane is configured for indoor workshop use as an underhung crane, underslung crane, or suspension crane. The crane runs on elevated runway rails supported by the building structure. Outdoor use would require:

• Different crane type — a gantry crane with ground rails and A-frame legs is more suitable for outdoor use
• Weather protection — outdoor electrical enclosures (IP55+) and anti-corrosion treatment
• Wind load design — anti-wind devices and anchoring for outdoor wind exposure

For outdoor applications, consult Yuantai Cranes for a suitable gantry crane solution.

To avoid surprises at installation, these items are outside the dual hoist underhung crane supply scope unless you specifically add them:

• Runway rail (150~400mm) and rail fasteners
• Runway beam and building column reinforcement
• Building structural support for the 54.6 kN wheel load
• Site power supply up to the crane isolator
• Erection crane and site lifting equipment
• Local electrical connection and permits

Because the dual hoist underhung crane runs on elevated runway rails with two hoists on one girder, the building structure is critical — the runway beam and columns must support the 54.6 kN wheel load. Yuantai can provide runway load drawings as optional items.

Send these ten items and Yuantai will issue a free custom dual hoist underhung crane CAD drawing and proposal within 24 hours:

1. Required hoist capacities (t) — e.g., 5t + 3t
2. Long travel / end beam rating (t) — e.g., 6t
3. Crane span (m) — e.g., 15.24m
4. Required lifting height (m) — e.g., 9.144m
5. Rail width (mm) — e.g., 150~400mm
6. Number of cranes required (e.g., 1 unit)
7. Power supply (V / Hz / Ph) — e.g., 3P 400V 50Hz
8. Duty class — e.g., A5
9. Longest load length and weight for two-point lifting
10. Control preference: pendant, wireless, cabin, or both

The more complete the list, the faster and more accurate the dual hoist underhung crane drawing and quote.

This published dual hoist underhung crane drawing and 3D rendering are a free technical reference — you may use them to plan your workshop and check fit. A project-specific dual hoist underhung crane GA drawing and 3D model are also free for standard configurations. A design fee may apply only for complex workshop conditions, non-standard spans, or specialized customization engineering (e.g., two-hoist load calculations and combined deadweight verification). The dual hoist underhung crane drawing remains the property of Yuantai Cranes: unauthorized copying, use, or manufacturing without written authorization is strictly prohibited.