Species                                    Common name              Code                      Decay resistance

Abies amabilis                         Pacific silver fir            Abam                            none

Abies concolor                        White fir                       Abco                            none

Abies lasiocarpa                      Subalpine fir                 Abla                             none

Abies magnifica                      Shasta red fir                Abma                           none

Abies procera                          Noble fir                       Abpr                            none

Alnus rubra                             Red alder                     Alru                              none

Calocedrus decurrens             Incense cedar               Cade                            high

Picea engelmannii                   Engelmann spruce         Pien                             none

Picea sitchensis                       Sitka spruce                 Pisi                               none

Pinus contorta                         Lodgepole pine            Pico                             slight

Pinus jeffreyi                           Jeffrey pine                   Pije                              slight

Pinus lambertiana                   Sugar pine                    Pila                              moderate

Pinus monticola                      Western white pine       Pimo                            moderate

Pinus ponderosa                     Ponderosa pine             Pipo                             slight

Pseudotsuga menziesii            Douglas-fir                   Psme                            moderate

Thuja plicata                           Western redcedar         Thpl                             high

Tsuga heterophylla                 Western hemlock          Tshe                             none