§ 21.63. Group three woods.

 (a)  The following woods may be substituted for spruce in required spruce sizes

Red alder	Alnus rubra, rhombifolia.
Alaska cedar	Chamaecyparis nootkatensis.
Red Cypress	Taxodium distichum.
White cypress	Taxodium distichum.
Yellow cypress	Taxodium distichum.
Douglas fir (Rocky Mountain region)	Pseudotsuga taxifolia.
Douglas fir (Inland Empire)	Pseudotsuga taxifolia.
Noble fir	Abies nobilis.
Silver fir	Abies amabilia.
White fir	Abies concolor, grandis.
Black gum	Myssa sylvatica.
Red gum	Liquidambar styraciflua.
Hackberry	Celtis occidentalis, laevigata.
Holly	Ilex opaca.
Magnolia	Magnolia grandiflora.
Soft maple	Acer saccharinum.
Idaho white pine	Pinus monticola.
Yellow poplar	Liriodendron tulipifera.
Redwood	Sequoia sempervirens.
Eastern spruce	Picea glauca, rubra.
Sitka Spruce	Picea sitchensis.
Sycamore	Platanus occidentalis.
Tupelo	Myssa aquatica.

 (b)  All minimum dimensions of wood side rails specified in this chapter are based on the species of woods listed under subsection (a).

Cross References

   This section cited in 34 Pa. Code §  21.21 (relating to wood side rails); 34 Pa. Code §  21.32 (relating to side rails); 34 Pa. Code §  21.40 (relating to step ladders); and 34 Pa. Code §  21.65 (relating to wood for ladder use).

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