34 Pa. Code § 21.61 - Group one woods

The following woods may not be more than 10% smaller than spruce in each cross section dimension

White ash	Fraxinus americana, biltmoreana, pennsylvanica lanceolata, pennsylvanica, quadrangulata.
Beech	Fagus grandifolia.
Birch	Betula lenta, lutea, nigra.
Douglas fir (dense)	Pseudotsuga taxifolia.
Rock elm	Ulmus racemosa.
Hickory	Hicoria ovata, laciniosa, alba, glabra, ovalisi.
Ironwood	Ostrya virginiana.
Black locust	Robinia pseudacacia.
Honey locust	Gleditsia triacanthos.
Hard maple	Acer nigrum, saccharum.
Red maple	Acer rubrum.
Red oak	Quercus borealis maxima, borealis, velutina, shumardii texana, palustris, phellos, laurifolia, rubra, rubra pagodaefolia, nigra, ellipsoidalis, coccinea, marilandica, kelloggii, catesbaei.
White oak	Quercus alba, stellata, lyrata, bicolor, muehlenbergii, garryana, prinus, montana, macrocarpa, lobata, virginiana, douglasii, utahensis, emoryi, arizonica, oblongifolia.
Osage orange	Toxylon pomiferum.
Pecan	Hicoria pecan, cordiformis, cordiformis elongata, myristicaeformis, aquatica.
Persimmon	Diospyros virginiana.
Southern pine (dense)	Pinus taeda, palustris, serotina, echinata caribaea, rigida, glabra.

Notes

34 Pa. Code § 21.61

This section cited in 34 Pa. Code § 21.21 (relating to wood side rails); 34 Pa. Code § 21.23 (relating to wood steps); 34 Pa. Code § 21.31 (relating to general); and 34 Pa. Code § 21.65 (relating to wood for ladder use).