Incipient decay is treated as sound.
Advanced decay is treated as unsound and is ONLY ALLOWED in the grades of Standard and Industrial.
GDI 304: Voids and Distortions
Additional information regarding the classification of decay and the allowable manufactured hole sizes is covered in GDI304
Syllabus
GDI 304: Decay Classification
GDI 304: Manufactured Holes Allowance
A manufactured hole may be no longer than twice the diameter of the allowable hole and displace or void in the edge no more wood than the allowable hole.
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