Mn

Explanation Not inspected, inaccessible or passed by

No defects:

- less than 5 % lost material

- sound surface material

- no evidence of borer damage

Minor Defects:

- 5 to 10% lost material

- sound surface material

- no evidence of borer damage

- minor abrasion damage

MD Moderate Defects:

- 15 to 45% lost material

- significant loss of outer shell material

- evidence of borer damage

- significant abrasion damage

MJ Major Defects:

- 45 to 75% lost material

- significant loss of outer shell and interior material

- evidence of severe borer damage

- severe abrasion damage

SV Severe Defects

- more than 75 % lost material

- no remaining structural strength

- severe borer damage

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