28 The Colorado Experiment Station. 
TABLE NO. 9—Poured Posts. 
Size, 5x5 inches from base to ground line, tapering to 3x3 inches at 
top. Length, 6 feet 6 inches. Cured weight, 115 to 120 pounds. Mixture, 
1 part cement 3 parts sand and 3 parts gravel, by measure. Cost of cement 
per post, 14 pounds, 8.4 cents; sand and gravel, 1 cubic foot, 3.7 cents. For 
cost of reinforcement, see table below. 
REINFORCEMENT 
TEST 
COST 
REMARKS 
Kind of Wire 
Weight 
Per Post 
Ebs. 
Cost 
Per 
Post 
First 
Crack 
in Ebs. 
Final 
Break 
in Ebs. 
Eoeation 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. 
4 strands of 2 
wires twisted 
No. 10- 
2 l / 2 
10.0c 
177 
218 
Ground line 
Ground line 
4 in. below 
22.1c 
Wires broke on 2 
and mixture 
broke on one. 
4 long and 2 
short twisted 
strandsNo. 10 
3 
12.0c 
188 
330 
4 in. above 
12 in. above 
4 in. below 
24.1c 
Wires broke 
4 long strands 
old barbed 
wire- 
1 % 
3.3c 
88 
110 
Ground line 
Ground line 
Ground line 
15.4c 
Wires broke 
4 long and 2 
short old 
barbed wire. 
2 
4.0c 
70 
118 
20 in. above 
24 in. above 
15 in. above 
16.1c 
Wires broke, 
not well 
placed. 
4 long strands 
new barbed 
wire --- - 
1 % 
6.6c 
103 
143 
4 in. below 
Ground line 
Ground line 
18.7c 
Wires broke 
4 long and 2 
short new 
barbed wire- 
2 
8.0c 
115 
123 
Ground line 
3 in. above 
10 in. above 
20.1c 
Wires broke 
4 long strands 
of 3 twisted 
wires, No. 14 
1 % 
6.6c 
102 
123 
Ground line 
27 in. above 
Ground line 
18.7c 
Wires broke 
4 long 2 short 
strands of 3 
twisted No. 14 
2 
8.0c 
85 
143 
Ground line 
7 in. below 
4 in. below 
20.1c 
Mixture broke on 
two and wires 
broke on one. 
Figure 8. 
A few types of broken posts showing: (A) The splitting off of the tamped post. } (B) The 
bursting due to the buckling of the tube of a commercial truss. (C) A post in which mixture and 
reinforcement were about equal. (D) A post in which smooth wire reinforcement was used, the 
wires slipped, thus allowing the post to bend. (E) Post removed from mold too soon. 
