Single vs. Double Girder Overhead Crane: How to Choose the Right Capacity, Span & Duty Class for Your Workshop

Which Overhead Crane Do I Need for My Workshop?

Single‑Girder VS Double‑Girder Overhead Crane: Key Differences

Maintenance shops, small processing plants, facilities with low‑frequency lifting tasks.

Steel processing workshops, manufacturing plants, 24/7 continuous production lines, applications requiring heavy‑cycle lifting.

Three Critical Questions to Answer Before Buying Overhead Crane

1. Which installation type fits my building: Top‑Running or Under‑hung (Underslung)?

2. What FEM / ISO duty class does my actual working cycle require? User search intent: What overhead crane duty class do I need? Duty class reflects how heavily and frequently you use the crane. It is one of the most frequently ignored but decisive factors for service life. Using a light‑duty crane for non‑stop heavy‑cycle work will cause gearbox wear, motor overheating, brake damage and structural cracks. Light duty A1‑A3: Intermittent use, equipment maintenance, occasional lifting. Medium duty A4‑A5: Regular daily factory production. Heavy duty A6‑A8: 24/7 cyclic lifting, automated handling, steel‑mill working conditions. Ask yourself: How many lifting cycles per day? Is it intermittent or round‑the‑clock production? Match duty class to your real usage.3. Can my existing building support this overhead crane? Runway beam & hook approach. User search intent: Do I need runway beam calculation for overhead crane? Every overhead crane creates wheel pressure under full‑load lifting. ❌ Risk: If building runway beam cannot bear the wheel pressure, safety hazards will occur. You need to confirm: Has your supplier completed runway beam load calculation based on your building structure? How close can the hook reach workshop walls (hook approach distance)? Double‑girder models deliver better hook approach and higher lifting headroom, making better use of your workshop floor space.

Power Supply Options for Overhead Crane