PDFWAC 296-54-549
Selecting spar, tail and intermediate support trees.
(1) Spar, tail and intermediate support trees must be examined carefully for defects before being selected. They must be sound, straight, green and of sufficient diameter to withstand the strains to be imposed.
(2) Trees having defects that impair their strength must not be used for spar, tail or intermediate support trees. Raised trees must be identified and marked as such.
(3) Douglas fir or spruce must be used as spar trees when available. If other species must be used, additional guylines, tree plates or other precautions must be taken to ensure that the tree will withstand the strains to be imposed.
[Statutory Authority: RCW 49.17.010, [49.17].040 and [49.17].050. WSR 99-17-117, § 296-54-549, filed 8/18/99, effective 12/1/99. Statutory Authority: RCW 49.17.040, 49.17.050, 49.17.240, chapters 43.22 and 42.30 RCW. WSR 80-11-057 (Order 80-15), § 296-54-549, filed 8/20/80. Statutory Authority: RCW 49.17.040, 49.17.150 and 49.17.240. WSR 79-10-081 (Order 79-14), § 296-54-549, filed 9/21/79.]