Double Girder Overhead Crane 10 Ton S20m H7m 90m Runway

Deflection Span/900 means the maximum allowable girder deflection under rated load is 1/900th of the crane span:

• Span: 20,000 mm
• Allowed deflection (Span/900): 20,000 / 900 = 22.2 mm
• Actual deflection achieved (1/920): 20,000 / 920 = 21.7 mm
• Improvement: The actual 1/920 deflection is approximately 2% better than the customer's Span/900 requirement

Lower deflection = higher rigidity, which provides:

• More stable load handling — less girder sag under 10t load
• Better trolley travel — the trolley rail stays flatter, reducing trolley resistance and wear
• Longer component life — less stress on the girder, end carriages, and rail
• Improved positioning accuracy — the hook position is more predictable under varying loads

Higher rigidity is especially important for a 20m span at 10t capacity, where the load moment is significant. Yuantai custom-engineers every high-rigidity crane to meet or exceed the customer's deflection requirement.

All motors VFD means the hoist, trolley travel, and long travel motors all use variable frequency drive control. This configuration provides:

• Smooth acceleration and deceleration — no shock loading on the load or structure
• Precise positioning — stepless speed control for accurate load placement
• Reduced load sway — smoother motion reduces pendulum swing across the 20m span
• Energy savings — VFD matches motor speed to actual load, reducing power consumption
• Longer component life — less mechanical wear on gears, brakes, and wheels
• Adaptability — VFD settings can be tuned for different load types and handling requirements

For a 20m span, 90m runway, 10t capacity crane, full VFD is critical for smooth long-distance travel, precise trolley positioning, and safe load handling. This is more advanced than hoist-only VFD (which is common on smaller cranes).

A single double girder overhead crane can serve a 90m travel length efficiently because:

• Full VFD long travel: The crane travels at 2.0-20 m/min along the 90m runway, allowing fast movement between handling zones
• Wide 20m span: The crane covers the full width of the workshop bay at each position along the runway
• Precise positioning: VFD control ensures smooth acceleration and deceleration at each handling zone
• Single operator: One pendant or remote operator can control the crane along the entire 90m runway
• Power supply: Conductor rail or festoon system supplies power along the full 90m runway

If your workshop has multiple production aisles, multiple cranes may be more efficient than one very long travel crane. Tell Yuantai your workshop layout for the best configuration.

Eight numbers on this high-rigidity double girder overhead crane drawing must match your workshop, or the crane will not fit or operate correctly:

If any of these eight differ from your workshop, tell Yuantai before ordering — each change affects price and lead time on the high-rigidity double girder overhead crane.

P30 rail is specified for this high-rigidity double girder overhead crane because:

• Wheel load: The 10t capacity and 20m span create significant load moment at the end carriages
• Long 90m runway: The extended travel length requires a heavier rail section for durability and alignment
• High-rigidity structure: The high-rigidity girder design increases the crane's structural mass, contributing to the wheel load
• Full VFD travel: While VFD reduces dynamic loads, the 2-20 m/min travel speed still requires adequate rail section
• Long service life: P30 rail is standard for 10t+ double girder overhead cranes in continuous workshop use
• Standard availability: P30 is a common rail section, easy to source and replace along the 90m runway

Do not substitute a lighter rail (P22 or P24) without recalculating the wheel load and dynamic forces. The combination of 10t capacity, 20m span, and 90m travel length requires P30 or heavier.

No — this high-rigidity double girder overhead crane with crab wire rope hoist is configured for indoor workshop use. The full VFD overhead crane runs on elevated runway rails supported by the building structure, not on ground rails. 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, see the MHO 5t-7m A5 Siemens version with anti-wind and anti-toppling design, or the Long Travel Gantry Crane 5 Ton - S20m - H6m - 70m Runway for long outdoor corridors.

To avoid surprises at installation, these items are outside the high-rigidity double girder overhead crane supply scope unless you specifically add them:

• Runway rail (P30) and rail fasteners for the 90m runway
• Runway beam and building column reinforcement
• Building structural support for the wheel load along 90m
• Site power supply up to the crane isolator
• Erection crane and site lifting equipment
• Local electrical connection and permits

Because the high-rigidity overhead crane runs on elevated runway rails over a 90m length, the building structure and rail alignment are critical — the runway beam and columns must support the wheel load, and the rail must be aligned for smooth travel over 90m. Yuantai can provide runway load drawings as an optional item.

Send these twelve items and Yuantai will issue a free custom high-rigidity double girder overhead crane CAD drawing, 3D model, and proposal within 24 hours:

1. Workshop width and runway rail center-to-center distance (span)
2. Deflection requirement (e.g., Span/900, Span/800, Span/1000) — most important for high-rigidity design
3. Required lifting height (m) — e.g., 7m
4. Required lifting capacity (t) — e.g., 10t
5. Workshop length / crane travel distance — e.g., 90m
6. Power supply (V / Hz / Ph)
7. Lifts per hour or hours per day (duty)
8. Building column and runway beam capacity
9. Number of handling zones along the runway
10. Longest load length and weight
11. Control preference: pendant, wireless, cabin, or both
12. Any special requirements (high-precision handling, heavy load positioning)

The more complete the list, the faster and more accurate the high-rigidity overhead crane drawing, 3D model, and quote.

This published high-rigidity double girder overhead crane drawing and 3D rendering are a free technical reference — you may use them to plan your workshop and check fit. A project-specific high-rigidity overhead crane GA drawing and 3D model are also free for standard configurations. A design fee may apply only for complex deflection requirements, non-standard spans, or specialized customization engineering. The high-rigidity double girder overhead crane drawing remains the property of Yuantai Cranes: unauthorized copying, use, or manufacturing without written authorization is strictly prohibited.