Stonel Associates, Inc.
25 Flint Ridge Road
Report No. 0221.1 Date: 07-MAR-01
Re: Polylok Riser - P/N 3009 and Lid - P/N 3009C
Tests Performed At: United Concrete Products, Inc.
Tests Witnessed By: George E. Nelson on 21-FEB-01
Items Tested: Four (4) Riser columns with Lids, secured and equally spaced, in a common six (6) inch slab of concrete. Each column consists of seven (7) HDPE injection molded Risers and one (1) HDPE injection molded Lid. Each Riser column is 20 inches in diameter and 42 inches in height. The Riser and Lid joints contain foam seals and all sections are secured together with number 10 x 1 1/2 inch long stainless steel sheet metal screws.
Object of Testing: To determine the side pull force required to cause a catastrophic Riser column failure measured with a Dillon 10,000 pound Dynamometer, on two Riser columns.
Findings: A. A two-ply heavy-duty nylon sling was positioned on one column
in the upper area of its third Riser. It required 2,800 lbs. of side pulling
force to cause catastrophic failure to the Riser column.