32 
The Colorado Experiment Station. 
THE THREE-CORNERED POST. 
The three-cornered post, which is advocated to some extent, 
does not have as many points in its favor as it may seem. In the 
first place an equal amount of reinforcement in each corner of the 
post cannot make a post of equal strength from two opposite di¬ 
rections. If a force is brought to bear against one of the flat sides 
of the post towards the opposite corner, the material in the corner 
will crush long before the wires will break on the side from which 
Figure 10. 
The post shown in Fig. 9 after the test. Two-fifths of the pressure is 
exterted above the brace and three-fifths below. 
• 
the force is exerted. On the other hand, if a force is brought to 
bear against one corner of the post towards the opposite flat side, 
the single reinforcement in the corner will break before the mixture 
has begun to crush on the flat side. 
An extra reinforcement in the corner on which the force is 
exerted towards the opposite flat side will make it practically as 
