ROCKY MOUNTAIN MINE TIMBERS. 
23 
Table 12. — Data on individual crushing tests of air-seasoned round mine props (nominal 
size, 5-inch top by 6 feet long). 
>>g 
Diameter. 
•sa 
bc3 
II 
J5 
T3 
c 9 
o> 
ft 
"5 ><~? 
.a 
is"i 
Species. 
93 
is* 
9) 
* 
>d 
SfS 
be w 
Remarks. 
a 
9) 
3 
.23 
o 
o scv 
fig OT 
Pi 
w 
.a 
a 
a 
o 
* 
ft 
o 
3 
03 l, CO 
= d5 
5"S 
3-^ 
o 
tf 
3 
< 
« 
DD 
CO 
H 
pq 
o 
o 
s 
1,000 
Lbs. 
Lbs. 
lbs. 
Per 
Lbs. per 
cu. ft. 
Per 
Per 
per 
per 
per 
cent. 
cent. 
cent. 
In. 
In. 
sq. in. 
sq. in. 
sq. in. 
Led gepole 
1 
11.5 
24.58 
51 
21 
55 
4.85 
5.17 
3,910 
3,465 
890 
Grain spiral. 
pine (ship- 
2 
11.4 
24.46 
43 
22 
58 
4.77 
5.57 
3,992 
3,580 
875 
Do. 
ment A). 
3 
11.2 
27.96 
57 
18 
33 
5.17 
5.57 
4,770 
4,190 
1,194 
Do. 
4 
12.3 
24.16 
34 
20 
68 
5.09 
5.57 
3,340 
2,750 
954 
Do. 
5 
11.0 
25.83 
47 
19 
35 
4.77 
5.25 
4,640 
3,580 
1,031 
Do. 
Av'ge. 
11.5 
25.40 
46 
20 
50 
4.93 
5.43 
4,130 
3,513 
993 
L o d g epole 
6 
11.0 
28.14 
43 
26 
42 
4.38 
5.01 
5,100 
4,110 
1,198 
Do. 
pine (ship- 
7 
12.0 
27.72 
45 
26 
5.25 
5.57 
6,340 
4,980 
1,450 
ment B). 
8 
15.9 
23.42 
50 
26 
61 
5.17 
5.49 
4,980 
4,010 
1,135 
Do. 
9 
11.2 
29.52 
45 
20 
37 
4.01 
5.73 
6.190 
4,750 
1,452 
Do. 
10 
11.1 
26.58 
42 
17 
37 
5.25 
5.41 
5,230 
4,240 
1,175 
Do. 
Av'ge. 
12.2 
27.08 
45 
23 
44 
4.81 
5.44 
5,568 
4,438 
1,282 
Alpine fir . . . 
1 
12.4 
20.24 
15 
16 
4.30 
5.41 
4,120 
3,165 
890 
2 
12.0 
22.88 
23 
12 
4.46 
5.33 
4,260 
3,875 
1,043 
3 
10.5 
20.38 
16 
9 
4.06 
5.09 
3,910 
3,550 
1,002 
Do. 
11.6 
21.17 
18 
12 
4.27 
5.28 
4,097 
3,530 
978 
Engelmann 
1 
11.7 
27.42 
41 
23 
4.62 
5.97 
5,560 
4,290 
1,321 
Do. 
spruce. 
2 
11.2 
28.10 
25 
13 
5.09 
5.49 
3.280 
2,555 
802 
Do. 
3 
11.0 
23.33 
29 
13 
3.50 
4.62 
3, 742 
3,120 
1,021 
Do. 
4 
13.0 
24.00 
43 
22 
3.98 
5.25 
2,990 
2,410 
703 
Crooked. 
5 
13.7 
24.81 
50 
28 
4.30 
4.93 
4,540 
3,850 
1,196 
Grain spiral. 
6 
11.3 
23.86 
31 
20 
4.62 
5.33 
4,710 
3,822 
1,150 
7 
10.9 
21.78 
16 
12 
4.85 
5.49 
4,030 
3,030 
1,098 
11.8 
24.76 
33 
19 
4.42 
5.29 
4,122 
3,297 
1,042 
Douglas fir. . 
1 
11.9 
31.63 
76 
25 
31 
4.30 
4.62 
2,960 
2,340 
873 
Crooked; grain spiral. 
2 
11.5 
32.66 
47 
25 
39 
4.54 
5.39 
5,250 
4,450 
1,322 
Crooked; grain un- 
usually knottv. 
3 
11.6 
28.98 
65 
28 
39 
4.85 
5.17 
4,580 
3,465 
986 
Crooked; grain spiral. 
Grain slightly spiral, 
knotty. 
4 
13.7 
28.31 
30 
26 
60 
5.25 
5.41 
5,720 
4,240 
1,324 
5 
13.0 
26.06 
28 
21 
37 
5.33 
6.05 
4,660 
3,590 
1,151 
12.3 
29.53 
49 
25 
41 
4.85 
5.33 
4,634 
3,617 
1,131 
Bristle-cone 
1 
12.5 
29.38 
40 
22 
42 
3.90 
4.54 
4,320 
3,512 
1,023 
pme. 
2 
12.6 
32.01 
45 
19 
49 
3.66 
4.30 
4,390 
3,420 
862 
3 
12.4 
36.46 
42 
20 
3.66 
4.22 
3,042 
2,280 
837 
Crooked; grain spiral. 
4 
12.2 
30.34 
35 
19 
68 
3.18 
4.30 
2,340 
2,013 
628 
Crooked. 
5 
12.2 
25.37 
30 
20 
3.98 
4.85 
3,415 
2,890 
779 
Av'ge. 
12.4 
30.71 
38 
20 
3.68 
4.44 
3,501 
2,823 
826 
Western vel- 
1 
10.5 
21.48 
16 
17 
21 
3.66 
4.80 
3,050 
2,470 
742 
low pine 
2 
11.1 
23.55 
15 
18 
88 
4.30 
4.62 
3,842 
3,310 
852 
Grain spiral. 
(shipment 
3 
11.9 
21.99 
14 
13 
95 
4.06 
4.85 
3,230 
3,625 
1,068 
A). 
4 
11.6 
25.50 
11 
19 
96 
3.50 
4.80 
5,330 
4,780 
1,146 
5 
13.4 
23.69 
15 
12 
4.14 
4.85 
3,370 
2,822 
626 
Av'ge. 
11.7 
23.24 
14 
16 
75 
3.93 
4.78 
3,764 
3,401 
887 
Western yel- 
6 
11.7 
26.30 
17 
12 
4.93 
5.57 
4,070 
3,250 
1 976 
Crooked. 
low pine 
7 
11.6 
24.03 
19 
17 
4.70 
5.25 
4,260 
3,690 
3 863 
[Grain spiral. 
(shipment 
8 
13.0 
27.72 
31 
20 
4.93 
5.65 
4,420 
3,350 
1,160 
B). 
9 
11.5 
25.73 
13 
19 
4.93 
5.41 
4,790 
3, 770 
1,115 
Do. 
10 
10.9 
23.64 
12 
14 
4.62 
5.33 
3,120 
2,270 
628 
Grain spiral , crooked . 
11.7 
25.48 
18 
16 
4.82 
5.44 
4,132 
3,266 
956 
