Mid-America Transportation Center


Date of this Version


Document Type



MwRSF Research Report No. TRP-03-198-08


Report No. TRP-03-198-08


Dynamic impact testing was performed on 152-mm x 203-mm (6-in. x 8-in.) CRT wood posts placed in a rigid sleeve at various angles. A total of nine bogie tests were performed with three tests each at 0, 90, and 45 degree rotation angles relative to the strong axis of bending. For each bogie test, the raw acceleration data was obtained from accelerometers and was filtered. Then, force-displacement and energy-displacement graphs were plotted. Based on the results, the properties and strengths of the CRT wood posts at the different impact angles were determined. The results of this study will be the basis in a future R&D effort to design a new, Universal Breakaway Steel Post for various guardrail applications.