The classification calculation is as follows (only the 100% RT figures are used):
Classification A: If % Reject Inches (linear i.e. number of inches rejected/number of inches RT in %) is less than or equal to 0.2 (%) and % Reject Joint (count i.e. number of joints rejected/number of joints RT in %) is less than or equal to 5 (%).
Classification B: If % Reject Inches (linear i.e. number of inches rejected/number of inches RT in %) is less than or equal to 0.4 (%) and % Reject Joint (count i.e. number of joints rejected/number of joints RT in %) is less than or equal to 7.5 (%).
Classification C: If % Reject Inches (linear i.e. number of inches rejected/number of inches RT in %) is less than or equal to 0.5 (%) and % Reject Joint (count i.e. number of joints rejected/number of joints RT in %) is less than or equal to 7.5 (%).
Classification D: If % Reject Inches (linear i.e. number of inches rejected/number of inches RT in %) is more than 0.5 (%) or % Reject Joint (count i.e. number of joints rejected/number of joints RT in %) is more than 7.5 (%).