30 
The Colorado Experiment Station. 
TABLE NO. 11—Poured Posts (Triangular). 
These are triangular posts made in triangular sheet iron molds. Size, 
7 inches on each side at the bottom, tapering to 5 inches on each side at 
the top. Length, 6 feet 6 inches. Cured weight, 85 pounds. Mixture, 1 
part cement and 3 parts sand, by measure. Cost for cement per post, 19 
pounds, 11.4 cents. Sand, % cubic feet, 2.5 cents. For cost of rein¬ 
forcement, see table below. In the test, one post of the three was pulled 
away from the flat side towards the opposite corner and is marked (a); the 
other two were pulled from one corner towards the opposite flat side and 
are marked (b). 
REINFORCEMENT 
TEST 
COST 
REMARKS 
Kind of Wire 
Weight 
per Post 
Ebs. 
Cost 
Per 
Post 
First 
Crack 
in I y bs. 
Final 
Break 
in Ebs. 
Eocation of 
Break Above 
or Below 
Ground Eine 
Cost of 
Materials 
in Post 
New Wire is Fig¬ 
ured at 4c per 
Eb. and Old Wire 
at 2c per Eb. 
3 long strands 
new barbed 
wire- - 
1M 
5.0c 
65(b) 
90(a) 
70(a) 
100(b) 
90(a) 
105(a) 
2 in. below 
2 in. above 
2 in. below 
18.9c 
Wire broke 
Mixture crushed 
Mixture crushed 
3 long and 3 
short old 
barbed wire- 
1 3 A 
3.5c 
45(b) 
35(b) 
30(a) 
50(b) 
55(b) 
100(a) 
15 in. above 
15 in. above 
15 in. above 
14.9c 
Wires broke 
Wires broke 
Mixture crushed 
6 long old barb¬ 
ed wires 2 in 
each corner . 
4.5c 
80(b) 
110(b) 
130(a) 
120(b) 
190(b) 
130(a) 
2 in. above 
2 in. below 
2 in. below 
15.9c 
Wires broke 
Wires broke 
Mixture crushed 
3 long No. 14 
3 strands 
twisted 
• 
l l A 
2.5c 
70(b) 
85 a) 
90(b) 
145(a) 
4 in. above 
4 in. below 
13.9c 
Wires broke 
Mixture crushed 
4 long new 
barbed 
wires*_ - 
1 % 
6.6c 
110(b) 
75(a) 
135(b) 
85(a 1 
Ground line 
6 in. above 
18.0c 
Mixture split 
Mixture crushed 
4 long No. 14 
3 strands 
twisted. - . 
l 2 A 
6.6c 
165(b) 
160'b) 
115(a) 
175(b) 
180(b) 
140(a) 
Ground line 
Ground line 
Ground line 
18.0c 
Mixture crushed 
Wires broke 
Mixture crushed 
4 long No. 
15 3 strands 
twisted - - . 
lVs 
4.5c 
130(b) 
130(b) 
105(a) 
150(b) 
175(b) 
105(a) 
Ground line 
Ground line 
1 in. above 
15.9c 
Wires broke 
Wires broke 
Mixture crushed 
THE EFFECT OF ALKALI ON CEMENT AND CONCRETE POSTS. 
It has been found that some soils contain an excessive amount 
of alkali, which has a tendency to destroy concrete work. While no 
experimental work has been done to test the effect of such soils 
upon cement or concrete posts, it has been conclusively proven that 
cement drain and sewer tiles which come in contact with water which 
has percolated through these alkali soils are soon destroyed. 
While it might be possible that the action on cement or concrte 
posts would be slower than in case of the tiles, it is probable that 
the posts would eventually be destroyed. 
For further information in regard to the effect of alkali on 
cement construction see Bulletin No. 69 of the Montana Agricul¬ 
tural College Experiment Station, and Bulletin No. 132, Agricul¬ 
tural Experiment Station of the Colorado Agricultural College. 
♦Where 4 wires are used for reinforcement, the extra wire is placed in 
the corner opposite to the side on which the fence wires are fastened. 
