Cantilever Underhung Crane 5 Ton S0.8m H10m with Counterweight

This is a highly specialized cantilever underhung crane designed for narrow bays where the runway rails are very close together:

• Span (rail to rail): 0.8m — the two runway rails are only 800mm apart, which is extremely narrow for a 5t underhung crane
• Cantilever each side: 0.85m — the bridge girder extends 850mm beyond each runway rail, so the hoist can travel beyond the rail line on both sides
• Effective working width: Approximately 2.5m total (0.85m + 0.8m + 0.85m) — much wider than the rail span alone
• Why cantilever: In some buildings, structural columns or existing beams force the runway rails to be very close together. The cantilever lets the crane still reach a useful working width
• Trolley gauge: 1000mm — the hoist trolley runs on a 1000mm gauge along the cantilever bridge girder

This configuration is unusual and always custom-engineered. If your building has a similar narrow-rail constraint, send Yuantai your rail spacing and required working width for a free feasibility check.

A counterweight is required on this cantilever underhung crane because:

• Narrow span, long cantilever: With only a 0.8m rail-to-rail span and 0.85m cantilever each side, the crane has very little wheelbase to resist overturning
• Overturning moment: When the 5t hoist lifts a load on the cantilever section, it creates a large overturning moment around the far rail
• Stability during travel: The counterweight also helps stabilize the crane during long travel, especially at the 2.0~20 m/min travel speed
• Safety margin: The counterweight provides a conservative safety margin so the crane remains stable even with the rated 5t load at the extreme cantilever end

The counterweight mass and position are calculated for each specific crane — based on capacity, cantilever length, and travel dynamics. Do not change the counterweight without a full engineering recalculation.

Eight numbers on this cantilever 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 cantilever underhung crane.

200~400mm rail width is specified for this cantilever underhung crane because:

• Wheel diameter Ø160mm — the wheel is designed to run on 200~400mm rail width
• 5t capacity with cantilever: The cantilever design creates higher concentrated wheel loads than a normal underhung crane, so a wider rail is required
• Counterweight reaction: The counterweight adds extra load on the rail, requiring a wider rail section
• Standard availability: 200~400mm rail width is common for heavier underhung cranes, easy to source and replace
• Long service life: 200~400mm 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 Ø160mm wheel and 40.4 kN wheel load require 200~400mm rail width or equivalent.

No — this cantilever 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
• Counterweight re-verification — outdoor wind loads would change the counterweight calculation

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

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

• Runway rail (200~400mm) and rail fasteners
• Runway beam and building column reinforcement
• Building structural support for the 40.4 kN wheel load
• Counterweight installation anchors and verification of available space
• Site power supply up to the crane isolator
• Erection crane and site lifting equipment
• Local electrical connection and permits

Because the cantilever underhung crane is a specialized narrow-span design with a counterweight, the building structure and counterweight location are critical — the runway beam and columns must support the 40.4 kN wheel load, and the counterweight must be positioned where it does not interfere with the building. Yuantai can provide runway load drawings and counterweight layout drawings as optional items.

Send these eleven items and Yuantai will issue a free custom cantilever underhung crane CAD drawing and proposal within 24 hours:

1. Required lifting capacity (t) — e.g., 5t
2. Rail center-to-center distance (span) — e.g., 0.8m
3. Cantilever length required each side (m) — e.g., 0.85m
4. Required lifting height (m) — e.g., 10m
5. Rail width (mm) — e.g., 200~400mm
6. Number of cranes required (e.g., 1 unit)
7. Available space for counterweight
8. Power supply (V / Hz / Ph) — e.g., 3P 380V 50Hz
9. Duty class — e.g., A5
10. Longest load length and weight
11. Control preference: pendant, wireless, cabin, or both

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

This published cantilever 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 cantilever 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 cantilever designs, or specialized customization engineering (e.g., cantilever counterweight calculations and stability verification). The cantilever underhung crane drawing remains the property of Yuantai Cranes: unauthorized copying, use, or manufacturing without written authorization is strictly prohibited.