28 
BULLETIN 67, U. S. DEPARTMENT OF AGRICULTURE. 
Table 7. — Results of pole tests made by the Pacific Telephone & Telegraph Co. — Contd. 
PORT ORFORD CEDAR. 
Length. 
Number 
of poles 
tested. 
Average values of— 
Top di- 
ameter. 
Weieht Wei S nt 
Mois, Rings 
ture. per inch. 
Sap. - 
Top load 
at failure. 
Modulus 
of rup- 
ture. 
Inches. 
6 
Feet. 
25 
25 
25 
30 
30 
30 
35 
35 
3 
3 
4 
3 
3 
3 
3 
3 
Pounds. 
256 
315 
460 
375 
397 
441 
585 
591 
Pounds. 
31.3 
24.8 
26.6 
24.3 
25.2 
24.0 
30.4 
28.1 
Per cent. 
11.6 
10.7. 
13.3 
8.6 
20.5 
9.6 
10.1 
9.7 
16.3 
25.6 
10.3 
15.3 
15.0 
14.7 
9.0 
21.0 
Per cent. 
Pounds. 
2,027' 
3,277 
3 N 740 
2,318 
2,790 
3,377 
3,123 
3,057 
Lbs. per 
52. in. 
7,616 
7 896 
7 
8 
6,058 
-- 6,817 
6 
- : 7. 332 
8 
" 7;824 
7 
6/851 
8 
6,928 
Table 8. — Relation between top diameters and top breaking loads. 
[Pacific Telephone & Telegraph Co.'s tests.] 
Top di- 
ameter. 
Western red cedar 
from Idaho. 
Western red cedar , 
from Oregon and j Port Orford cedar. 
Washington. 
Length of poles. 
Number 
of poles. 
Average 
top 
breaking 
load. 
Number 
of poles. 
Average 
top 
breaking 
load. . 
dumber 
©f poles. 
Average 
top 
breaking 
load. 
25 and 30 feet 
Inches. 
6 
7 
8 
9 
7 
11 
9 
3 
Pounds. 
1,703 
2,139 
2,511 
2,992 
6 
9 
9 
3 
Pounds. 
1,411 
1,645 
6 
9 
Pounds. 
2,272 
25, 30, and 35 feet 
3,063 
3,169 
25, 30, and 35 feet 
2,115' 11 
35 feet.. 
3,257 
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