Class 1
Knots:
Helthy knots 2-5 cm
Unhelthy Or spoiled alloud to 5 cm diameter
Knob up to 1 cm high is alloud but not more than 1/2
Roses up to 10 cm
Shakes:
End shake alloud up to 1/3 of diameter (if bigger reduction of 40 cm from lenght)
End and side shake alloud (on one piece)
Curvature: Cloud if gives a possibility to cut pieces of 2,5 m lenght with Simple curvature up to 3 cm/1m
Slope of grain: to 12cm/1m
Ring Gall Cloud up to diameter 6 cm
Multipith: not alloud:
Internal sapwood not aloud
Rot:
Internal alloud to 1/5 of end diameter
Externall: not alloud
Shaft: not alloud
Insect Road deep and shallow: not alloud
Class 2
Knots:
Helthy knots up to10 cm
Unhelthy Or spoiled alloud to 8 cm diameter
Knob alloud
Roses alloud
Shakes:
End shake alloud (if bigger reduction from lenght)
End and side shake alloud (on one piece)
Curvature: Cloud if gives a possibility to cut pieces of 2,5 m lenght with Simple curvature up to 4 cm/1m
Slope of grain: alloud
Ring Gall Cloud up to diameter 12 cm
Multipith: not alloud:
Internal sapwood alloud
Rot:
Internal alloud to 1/3 of end diameter
Externall: up to ¼ of round up to 1/10 of end diameter
Shaft: not alloud
Insect Road deep and shallow: not alloud
Aperiance of alian stuff:not alloud.