Alpha W Rating

Strutt|Criteria|Ratings|Absorption|Absorption Class calculates the absorption class of the current row on the selected spreadsheet based on the weighted absorption `alpha_W` value (see Alpha W Rating) and inserts it into Column D of the current row.

The absorption class is assigned based on the `alpha_w` value as follows:

• Class A: `alpha_w` values of 0.90, 0.95, 1.00
• Class B: `alpha_w` values of 0.80, 0.85
• Class C: `alpha_w` values of 0.60, 0.65, 0.70, 0.75
• Class D: `alpha_w` values of 0.30, 0.35, 0.40, 0.45, 0.50, 0.55
• Class E: `alpha_w` values of 0.15, 0.20, 0.25
• Not Classified: `alpha_w` values below 0.15

Reference:

• EN ISO 11654 (1997)