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 Minimum net retention of active preservative1/
Form of product and
Penetration
Assay
Treating
service conditions
zone
specifi-
cations2/
(AWPA C1
and
others
listed
below)
In.
In. and/or
------------------------Pounds
per
cubic
foot--------------------------
pct of
sapwood
Timbers (cont.)
Glue-laminated-cont.
For use in coastal
waters-cont.
In areas where teredo are
present with no
limnoria activity
5/
Coastal Douglas-fir
0.75 and 90
20.0
0-0.60
--
--
--
--
--
--
--
--
--
--
--
and western hemlock
5/
6/
Southern, ponderosa,
2.50 or 85
0-3.00
20.0
20.0 --
--
--
--
--
--
--
--
--
--
and red pines
For use in fresh water,
in ground contact, or for
important structural
members not in contact
with ground or water
--
--
--
--
--
--
12.0 0.60 0.75 0.75
12.0
12.0
Southern pine, coastal (7)
(9)
Douglas-fir, and
western hemlock
For use above ground
Southern pine, coastal
(8)
6.0
6.0
6.0
0.30
0.30
0.30
--
--
--
--
--
--
(9)
Douglas-fir, and
western hemlock
C28
Laminates prior to gluing
For use in ground contact
Coastal Douglas-fir
1.25
0.5-1.00 12.0
--
--
0.60
0.75
0.75
0.50
0.40
0.40 --
--
--
Western hemlock
1.25
0.5-1.00 12.0
--
--
0.60
0.75
0.75
0.50
0.40
0.40 --
--
--
Southern pine
3.00 or 90
0.5-1.00 12.0
--
--
0.60
0.75
0.75
0.50
0.40
0.40 --
--
--
For use above ground
Coastal Douglas-fir and
1.00
0.5-1.00
6.0
--
--
0.30
0.30
0.30
0.25
0.25
0.25 --
--
--
western hemlock
Southern pine
3.00 or 90
0.5-1.00 6.0
--
--
0.30
0.30
0.30
0.25
0.25
0.25 --
--
--
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