ASSE recognized a need for the standard, named the American National Standard for the Safe Construction and Demolition of Wind Generation/Turbine Facilities (A10.21-20xx), in part due to increasing green energy development and the potential risks involved in construction operations relating to green energy initiatives.
“The committee decided to develop this standard because of the national emphasis on green energy, recognizing that thousands of these ‘green’ structures are going to be built and as such present challenging safety and health issues,” A10 Committee Chair Richard King said. “The purpose of the new standard is to sort out the safety and health issues and provide practical solutions to constructors.”
During the January 2009 A10 ASC meeting, the committee approved the A10.21 subgroup to develop the standard. Ryan J. Jacobson, manager of wind energy services for Black & Veatch, will serve as the subgroup chair and Walter A. Jones, the associate director of occupational safety and health for Laborers’ Health & Safety Fund of North America, will serve as the A10.21 liaison.
Safety Concerns
Safety and health issues of concern during construction and demolition of wind generation/turbine facilities include working at heights, mechanical assembly of large components, medium voltage electrical safety and working in exposed environments. The subgroup will cite and recognize other existing voluntary national consensus standards in the development process.
In addition, major construction tasks in a wind project that will be considered include:
- Wind turbine assembly and erection;
- Civil construction (roads and pad clearing);
- Structural construction (foundations);
- Placement of electrical collection system (buried medium voltage lines); and
- Substation and transmission line construction.
The subgroup also will discuss the following activities:
- Wind turbine generator component offloading;
- Site staging;
- Base tower section placement, which could include anchor bolt tensioning, leveling and grouting;
- Tower assembly;
- Nacelle placement;
- Rotor assembly (typically on the ground);
- Rotor placement; and
- Mechanical completion and commissioning.
ASSE serves as the secretariat for the A10 Accredited Standards Committee on construction and demolition operations. The A10 standards serve as guides to contractors, labor and equipment manufacturers in the construction and demolition industry.