6 BULLETIN 77, IT. S. DEPARTMENT OF AGRICULTURE. 
Table 3. — Summary of bending tests on round mine caps (nominal size, 5-inch top by 
8 feet long; span, 7 feet; third-point loading). 
GREEN (WATER SOAKED). 
Species, number of tests. 
Rings 
Moisture. 
per 
inch. 
Per cent. 
89.3 
43 
133.3 
61 
56.7 
23 
60.6 
43 
89.5 
52 
40.1 
31 
99.5 
21 
147.2 
36 
57.6 
8 
54.3 
30 
74.6 
45 
36.3 
17 
69.4 
27 
119.1 
38 
32.6 
16 
74.3 
37 
96.1 
62 
66.2 
25 
88.5 
13 
106.3 
15 
71.1 
12 
147.1 
26 
198.4 
42 
86.5 
15 
Diameter. 
Modulus 
of 
Top. Butt. ^P^ 
Fiber 
stress at 
elastic 
limit. 
Lodgepole pine (shipment A); 10 
tests: 
Average 
Maximum 
Minimum 
Lodgepole pine (shipment B); 10 
tests: 
Average 
Maximum 
Minim um 
Alpine fir; 9 tests: 
Average 
Maximum 
"Minim um 
Engelmann spruce; 11 tests: 
Average 
Maximum 
Minimum 
Douglas fir; 10 tests: 
Average 
Maximum 
Minimum 
Bristle-cone pine; 10 tests: 
Average 
Maximum 
Minim um 
Western yellow pine (shipment A) ; 10 
tests: 
Average 
Maximum 
Minim um 
Western yellow pine (shipment B); 10 
tests: 
Average 
Maximum 
Minimum 
Inches. 
5.59 
5.90 
5.17 
5.78 
6.00 
5.25 
4.65 
5.63 
4.13 
5.16 
6.00 
4.44 
4.78 
6.25 
4.00 
4.63 
5.63 
3.38 
4.39 
4.80 
3.75 
4.42 
5.00 
3.62 
Inches. 
6.20 
5.60 
6.75 
6.00 
5.72 
6.50 
5.38 
6.40 
7.00 
5.60 
6.25 
4.75 
5.45 
6.12 
5.00 
Lbs. per 
sq. in. 
5,172 
6,460 
4,040 
4,768 
6,180 
3,585 
4,139 
5,260 
1,945 
5,308 
>,280 
3,500 
6,568 
7,310 
4,840 
4,578 
5,480 
3,500 
4,333 
4,960 
3,860 
4,897 
6,190 
3, 320 
Lbs. per 
sq. in. 
3,104 
3,830 
2,635 
2,762 
3,555 
2,090 
2,450 
2,910 
1,782 
2,709 
3,665 
1,991 
3,455 
4,675 
2,505 
2,459 
3,960 
1,666 
2,170 
2,775 
1,553 
2,890 
3,540 
2,148 
AIR SEASONED. 
Lodgepole pine (shipment A); 5 tests: 
Average 
Maximum '. 
Minimum 
Lodgepole pine (shipment B) ; 5 tests: 
Average 
Maximum 
Minimum 
Alpine fir; 5 tests: 
Average 
Maximum 
Minimum 
Engelmann spruce; 5 tests: 
Average 
Maximum 
Minimum 
Douglas fir; 5 tests: 
Average 
Maximum 
Minimum 
Bristle-cone pine; 5 tests: 
Average 
Maximum 
Minimum 
Western yellow pine (shipment A); 5 
tests: 
Average 
Maximum 
Minim nm 
Western yellow pine (shipment B); 5 
tests: 
Average 
Maximum 
Minimum 
11.4 
11.9 
10.6 
54 
72 
33 
4.76 
5.09 
4.54 
5.21 
5.49 
5.09 
9,026 
11,630 
7,180 
6,600 
8,640 
4,790 
11.1 
11.7 
10.6 
44 
47 
42 
4.84 
5.41 
4.54 
5.49 
5.73 
5.33 
6,954 
9,620 
4,490 
5,962 
7,290 
4,230 
11.4 
12.1 
10.4 
26 
37 
20 
4.22 
4.62 
3.66 
5.28 
5.57 
5.09 
7,340 
9,350 
5,270 
5,460 
6,600 
4,320 
10.9 
11.8 
8.8 
37 
45 
27 
4.41 
5.33 
3.50 
5.35 
6.05 
4.62 
8,242 
9,900 
6,260 
6,618 
7,340 
5,190 
11.8 
12.3 
11.4 
23 
29 
15 
4.30 
4.77 
3.82 
5.20 
5.57 
4.77 
9,232 
10,960 
5,790 
6,842 
7,660 
5,100 
11.5 
12.5 
10.7 
37 
52 
27 
3.82 
4.22 
3.50 
4.98 
5.25 
4.54 
8,408 
9,550 
7,000 
5,684 
6,700 
4,120 
10.3 
10.6 
9.4 
14 
15 
13 
3.58 
3.66 
3.50 
4.85 
5.09 
4.62 
7,660 
9,770 
5,660 
5,770 
7,730 
3,870 
10.7 
11.4 
10.3 
21 
26 
17 
3.90 
4.22 
3.58 
5.12 
5.41 
4.62 
6,012 
7,360 
4,210 
4,938 
5,830 
4,220 
