FACET Consulting Engineers of Brisbane arranged
the following testing.
Testing equipment, instrumentation and
testing personnel was provided by the Structures and Geometrics
Testing Laboratory of The Department of Civil Engineering
at The University of Queensland, a NATA accredited testing
Primary intention of the testing was to establish the lateral
bending strength of a variety of OZPOSTS in light to medium
sandy and silty clay soil conditions.
This would provide test data at the bottom end of the range
of expected bending strength, thus providing a lower bound
expectation and replicate the behaviour of the OZPOST under
the effect of wind loading or other horizontal loading.
Dynamic Cone Penetrometer testing was undertaken at a representative
number of points at each test site to provide for correlation
between soil strength parameters and OZPOST bending strength
test results. Data specific to these tests is available
A 5kN calibrated load cell was used to apply a horizontal
load against a reaction frame.Loading was applied at approximately
1kN/minute to failure.
From the test data obtained, suitable posts for particular
applications could be established by calculation to suit
particular OZPOST supports in these soil strength conditions.
Site 1 - Sand Fill
2 - Sandy silty clay
For the Oz-posts tested in sand, failure was by overturning
due to soil failure.
Thus in better soil, the Oz-post strength would be expected
For the S600 and SW600 Oz-posts tested in silty clay,
failure was by compression blade buckling.
In better soils the Oz-post strength would not be expected
to increase significantly.
Similar products were tested under the same conditions
and failed to meet Oz-Post standards.