In order to evaluate the ultimate bond stress used in modelling soil nail behaviour for lateral support, soil nail pull out tests are conducted on the site. In the analysis of the test results it is assumed that the free length given to the test nail is completely free and that the load distribution along the grout body is uniform at failure. Three instrumented soil nail pull out tests were conducted to evaluate the validity of these assumptions. The current in-house practice for obtaining a free length proved to be effective. More testing is required to evaluate the typical load distribution at failure. Suggested next steps for further research in this regards are given.