ROCKY MOUNTAIN MINE TIMBERS. 
AIR DRI EO 
s 
•- 
DE 
AD 
1 
J 
^^T) -" 
B 
M 
GH 
EEN 
M 
a 
n 
AD- 
WATERSOAKED 
3 
FIBER 
STRESS AT ELASTIC LIMIT 
1000 
-. Al 
IDR 
ED 
2 
u 
o 
__DE 
\D 
w 
o 
QR 
r EN 
s 
DEJ 
kD-W 
*TER 
SOAK 
ED~' 
3 
o 
MC 
DUL 
.US 
OF 
*UP 
TUR 
E 
3000 
t& 
14 
a 
All 
DRI 
ED 
o 
I- 
2 to 
"V 
\ 
~GRI 
Iff" 
— e 
_,D 
SAD 
M 
e 
D£d 
D-Wi 
ITER 
50AK 
e5~~ 
STIFFI 
4ES 
r" 
6 
f 
10 
1 
!• 
3 
a C 
QRE 
EN 
« 
M 
3 ' 
AIR 
)RIE 
> 
WAT 
ERSC 
lAKE 
> 
0. 
-•— 
X 
u 
« 2 
Dl 
:ad 
\ 
VOR 
KT 
)M 
\XU 
wv 
LO 
AD 

T 
i 
I 
i 
a 
1 
i 
3 
2 
I 
1 
DIAMETER OF BUTT- INCHES 
Fig. 3.— Relation of unit strength of 16-foot round beams to diameter and condition. 
29206°— 14 2 
