Bursting Strength (kPa) | < 250 | 250–299 | 300–349 | 350–399 | 400–449 | 450–499 | 500–549 | 550–599 | 600–649 | 650 − 600 | ≥ 700 | |||||||||
Bursting Strength Score | 1 | 2.5 | 5 | 7.5 | 10 | 12.5 | 15 | 17.5 | 20 | 22.5 | 25 | |||||||||
Snag Strength (N) | < 20 | 20–39 | 40–59 | 60–79 | 80–99 | 100–119 | 120–139 | 140–159 | 160–179 | 180–199 | ≥ 200 | |||||||||
Snag Strength Score | 1 | 2.5 | 5 | 7.5 | 10 | 12.5 | 15 | 17.5 | 20 | 22.5 | 25 | |||||||||
Abrasion Resistance (rubs) | < 25 | 25–50 | 75–100 | 125–150 | 175–200 | 250 | 300 | 350 | ≥ 400 | |||||||||||
Abrasion Resistance Score | 1 | 3 | 6 | 9 | 13 | 16 | 19 | 22 | 25 | |||||||||||
Hole Enlargement (mm) | ≥ 21 mm | 20 − 6 mm | ≤ 5 mm | |||||||||||||||||
Hole Enlargement Resistance Score | 10 | 20 | 25 | |||||||||||||||||
Secondary Damage | Laddering | Unravelling | Â | Tearing combined with Laddering or Unravelling | ||||||||||||||||
Secondary Damage Penalty | 10 | 20 | Â | 30 | ||||||||||||||||
Penalty Score | =Secondary damage penalty*Hole enlargement resistance score/100 |