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 Minimum net retention of active preservative1/
Form of product and
Penetration
Assay
Treating
service conditions
Zone
------------------------Pounds
per
cubic
foot--------------------------
In. and/or
In.
pct of
sapwood
Lumber (cont.)
For use in fresh water in
ground contact or for
important structural
members not in contact
with ground or water
--
--
10.0 -- 10.0 0.50 0.62
0.62
0.50 0.40
0.40 --
Coastal Douglas-fir,
0.4 and 90
0-0.60
western hemlock, western
larch, and redwood
--
--
10.0 10.0 10.0 0.50
0.62
0.50
0.40
0.40 --
Southern and ponderosa
2.5 or 85
0-0.60
0.62
pines
--
--
10.0 10.0 10.0 0.50 0.62
0.62
0.50
0.40
0.40 --
Jack, lodgepole, red,
0.4 and 90
0-0.60
northern white, western
white, and sugar pines
--
--
10.0 -- 10.0 0.50 0.62
0.62 0.50
0.40
0.40 --
90
0-0.60
Interior Douglas-fir
--
--
8.0
--
8.0 0.40 0.50
0.50 0.50
0.40
0.40 --
Black or red gum
1.5 or 75
0-0.60
--
--
7.0
7.0
0.44 0.50
0.40
0.40 --
Red Oak
65 pct of
0-0.60
7.0 0.35 0.44
annual rings
--
--
--
--
--
--
--
-----------Refusal-------------
95 pct of
--
White oak
sapwood
For use above ground
Coastal Douglas-fir,
0.4 and 90
0-0.60 8.0
8.0
0.25 0.06
8.0 0.40 0.40 0.40 0.25 0.25 0.25 0.45
western hemlock, western
larch, and redwood
Southern and ponderosa
0.40
0.25
0.25
8.0
8.0
8.0
0.40
0.40
0.25 0.06
2.5 or
85
0-0.60
0.25 0.45
pines
Jack, lodgepole, red,
0.40
0.25 0.06
8.0
8.0
8.0
0.40
0.40
0.25
0.25
0.25 0.45
0.4 and 90
0-0.60
northern white, western
white, and sugar pines
Interior Douglas-fir
0.40
0.25
0.25 0.06
8.0
8.0 8.0 0.40 0.40
0.25
0.25 0.45
90
0-0.60
Slack or red gum
6.0
6.0
0.25 0.06
1.5 or 75
0-0.60
0.30
0.25
0.25
0.25 0.45
6.0 0.30 0.30
Red Oak
0.25
0.25
0.25 0.06
0.30
6.0
6.0 6.0 0.30 0.30
0.25 0.45
65 pct of
0-0.60
annual rings
--
--
--
--
--
--
--
-----------Refusal-----------
95 pct of
--
White Oak
sapwood
Posts (sawn)
See requirements on timbers for use in ground contact
C2,C14,
C16
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