Table 5 Score matrix for calculation of RD values including hole enlargement using Method 2

Bursting Strength Score

1

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

Snag Strength (N)

Lowest test value range from lab

Intermediate test value ranges

Highest test value range from lab

Snag Strength Score

1

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

Abrasion Resistance (rubs)

Lowest test value range from lab

Intermediate test value ranges

Highest test value range from lab

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

Tearing combined with Laddering or Unravelling

Secondary Damage Penalty

10

20

30

Penalty Score

Secondary damage penalty x Hole enlargement resistance score/100