ACCIONA production facility
A heavy manufacturing facility delivered the crane capacity, clear space and reliability required to launch domestic renewable energy production while supporting safe operations and scalable growth.
Project
Overview
Acciona, a Spanish company described as the world’s largest wind power developer, wanted to establish its first wind turbine production plant in the United States to support growing domestic demand for renewable energy infrastructure.
The facility was designed to produce approximately 250 wind turbines in its first year, with capacity planned to increase as production scaled.
The 100,000-square-foot facility was engineered to accommodate complex crane operations across four separate aisles. Butler Heavy Structures provided the structural steel design and fabrication, delivering a system capable of supporting both extreme loads and continuous production.
Located in Iowa, which ranks third nationally in wind power output, the plant required a structure capable of supporting heavy manufacturing with precision and consistency.
The high bay supports a 190-ton top-running crane, supplemented by two 45-ton single-leg gantry cranes below. The remaining three bays each support 45-ton top-running cranes, allowing simultaneous operations without interference.
The framing system combines built-up columns and rafters, cold-formed secondaries, heavy conventional elements and wide-flange crane girders and columns.
This hybrid approach balances efficiency with strength, ensuring stability under repeated lifts while maintaining clear working space throughout the plant.
The building envelope reinforces performance and durability. A standing seam metal roof system and metal wall system provide long-term weather protection and low-maintenance operation.
To support the production environment, natural daylight was intentionally integrated into the design. The facility includes 156 insulated translucent roof panels and continuous bands of translucent wall panels along each sidewall, improving visibility and reducing reliance on artificial lighting.
A suspended catwalk runs the length of the high bay, allowing visitors and staff to tour the plant without interrupting active production. This feature reflects a facility designed not only for output, but for safety, efficiency and transparency.
Built to carry immense loads, adapt to future growth and perform day after day, the facility delivers the assurance required when production, safety and reliability must move forward together.
