By using the energy balance equations the coefficient of friction was deduced from the test results. Itis found that the coefficient of friction is substantial and that it increases as the test proceeds. This maybe associated with a gradual penetration of the sharp concrete crack edges into the wooden support.Adjustments of the early non-linear behaviour of the load deflection curves have been made inaccordance to the procedure in ASTM 1550-05. The adjustments had no significant effect on thecalculated energy absorption capacity.