Monterrey is a major industrial hub in Mexico. The client operates a massive factory specializing in heavy steel structure processing and warehousing. Before introducing our gantry crane, they relied on large forklifts and old single girder cranes inside huge closed workshops.
With capacity expanding rapidly, traditional material handling bottlenecks became very obvious. Crowded equipment and narrow aisles caused frequent forklift collisions with semi-finished products. Low heights also prevented efficient high-level stacking. The original single girder cranes suffered from excessive spans. Moving 10-meter-long H-beams caused severe swinging due to operational inertia. The loads easily struck workshop columns or nearby equipment, creating constant safety hazards. The client urgently needed a very stable indoor heavy-duty handling solution to cover the entire workshop span.

Our technical team held multiple video conferences with the client after receiving the inquiry. Frankly, a single girder gantry crane would be more attractive in terms of cost for a 7.5-ton capacity. However, after evaluating actual workshop measurement data, we firmly recommended the 7.5-ton double girder structure.
There are two main reasons for this choice:
After one and a half months of precise manufacturing and strict empty load testing, the crane was disassembled and packed into two 40HQ containers. It travelled by sea from Qingdao Port to Manzanillo Port, and then by land directly to the customer’s workshop.
Cross-border installations usually suffer from poor communication and unexpected site conditions. To avoid this, we provided intuitive 3D installation drawings and English manuals. We also dispatched a senior installation engineer to Monterrey for on-site technical guidance.
Installing large-span equipment indoors presents major challenges regarding ceiling height limits and avoiding existing floor machinery. Main girder splicing and lifting required careful coordination using two 50-ton truck cranes. Our engineer worked closely with local Mexican workers. We precisely calibrated track levels, completed high-strength leg-to-girder flange connections, and finished electrical bridging. The entire mechanical frame assembly took only 3 days.
The next two days focused on electrical fine-tuning. Addressing the hot, poorly ventilated indoor summer climate, our engineer optimized inverter cooling parameters. We fine-tuned the anti-sway sensitivity and aligned crane wheel paths using lasers. This ensures zero wheel bite along the 22-meter span track, extending track and wheel lifespans significantly.
During the final heavy-load test run, we hoisted a 7-ton bundle of I-beams across the workshop track. The double girder stability was perfectly verified here. Even at maximum traveling speed, the I-beams showed no noticeable swing. The braking process stayed smooth without jerking.
The customer’s production supervisor, Diego, smiled while signing the acceptance form: “The equipment runs much quieter than we expected. The remote control feels extremely precise, just like playing a video game. It improved our indoor handling efficiency by at least 30%. The production line looks much more organized now.”
Currently, this 7.5-ton double girder gantry crane has operated stably in Monterrey for several months. Through this cooperation, we eliminated indoor logistics blind spots for the client. We also established a solid indoor hoisting benchmark for our brand in the Latin American industrial crane market.