Underground—Global—Special—Tunneling
In June 2015, load tests were conducted on
those 10 samples. Type 20-23" BULLFLEX ®
Support Pillars showed an average load-
bearing capacity of approximately 580 kips
(2,580kN). Pillars type 25-29" had an average
load-bearing capacity of approximately
950 kips (4,225kN).
The successful performance evaluation of
BULLFLEX ® Support Pillars now forms the
basis for a technical document that allows
design firms and clients a fast and flexible
choice of additional standing support systems
wherever required.
In November 2015, a second series of load
tests was conducted on similar samples to
verify both the support capacities and an
improved yielding ability of the BULLFLEX ®
Pillars.
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