1.1 This practice covers the full-length preservative treatment of utility poles by the thermal process.

1.2 Poles furnished under this practice shall be limited to the following species: Douglas fir (Pseudotsuga menziesii),
Lodgepole pine (Pinus contorta),
Alaska yellow cedar (Chamaecyparis nootkatensis),
Northern white cedar (Thuja occidentalis),
and Western red cedar (Thuja plicata).

1.3 The purchaser should note that requirements both within and between species vary and care must be used in selection of specific options for the intended use and service area.