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 Group B utility poles, or building posts fail to meet penetration requirements, the entire charge or lot
shall be rejected.
In determining the penetration in Group A utility poles (less than 37.5 in. in circumference 6 ft
from the butt), 20 representative poles in a charge shall be bored at the approximate midpoint. If 18 of
the borings meet penetration requirements, the Group A poles in the charge as a whole shall be ac-
cepted, but the nonconforming poles shall be rejected If 16 or 17 of the borings meet penetration re-
quirements, each Group A pole in the charge shall be bored and only those meeting penetration
requirements shall be accepted. If less than 16 of the borings meet penetration requirements, the charge
shall be rejected.
4.2.2 Retention. For the assay of a charge of poles, a single boring shall be taken from each of
20 randomly selected poles. For the assay of piles, the number of borings from any charge shall be ac-
cording to the following schedule:
Number of piles in charge
Number of borings
20 or more
20 from 20 randomly
selected piles
15 to 19
One from each pile
Less than 15
At least 20, with
an equal number
from each pile
The borings shall be cut to the proper length from the species as shown in Tables II and III.
4.2.3 In the inspection of treated round fence posts, 30 representative posts of a lot shall be bored
for measurement of penetration. If less than 80 percent of the borings show the specified penetration,
the entire charge shall be rejected. If 80 percent or more of the borings meet the penetration require-
ment, a composite sample of one boring from each of 30 posts shall be taken for assay. The borings for
assay shall be cut to the proper length for the species as shown in table II. The inspection of sawn posts
shall be conducted according to the procedure outlined in 4.2.4 for the inspection of treated timbers.
4.2.4 In the inspection of treated lumber or solid timbers, 20 representative pieces of a lot shall
be bored for measurement of penetration. Southern and ponderosa pine shall be bored from sapwood
faces only. Douglas-fir, western hemlock, western larch, redwood and other species of pine shall be
bored from heartwood faces only. If 80 percent or more of the borings meet the penetration require-
ments, the lot is considered to meet penetration requirements. For laminated timbers, see footnote 7.
For the assay of treated southern and ponderosa pine lumber or timber, a composite sample of the outer
0.60 inch of borings shall be taken from sapwood. For the assay of Douglas-fir, western hemlock,
western larch, redwood, and other species of pine lumber or timber, a composite sample of the outer
0.60 inch of borings shall be taken from heartwood. Single borings shall be taken from 48 repre-
sentative pieces treated with creosote or creosote-containing solutions, and from 20 representative pieces
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