Collections
Pennsylvania Code
Title 34
Part I
Chapter 21
Wood Classification
Wood Classification
21.61
Group one woods.
21.62
Group two woods.
21.63
Group three woods.
21.64
Group four woods.
21.65
Wood for ladder use.
21.66
Sapwood.
21.67
Durability.
21.68
Density.
21.69
Names.
21.70
Strength tests.
21.71
Soft maple.
21.72
Pecan species.
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