You cannot apply Part 3 effectively without first performing the Risk Assessment in Part 2 . The result of the Risk Assessment dictates the Class of LPS required, which then dictates the geometry and material specs found in Part 3. Disclaimer: Standards are updated periodically (e.g., the 2010 edition vs. the 2024 draft updates). Always ensure you are referencing the latest valid edition adopted by your local jurisdiction. Ts Sexii Trina - 3.79.94.248