Pipe #6. The sixth pipe tested was a 16" diameter, HDPE specimen. The test was performed with a 3' cover of soil. The pipe specimen was mounted in the test boxes with the end couplings outside the boxes and shimmed to the ends of the boxes. The move-able test box was pulled four feet, forcing the pipe into bending and compression.
The first test with this pipe is described as test T9 in the Final Report in 2008.
For videos of T9: