ROHR2STOSS is an alternative dynamic module in the program system ROHR2. The results of ROHR2STOSS are integrated into the ROHR2 processing.ROHR2stoss System.ROHR2stoss is an alternative dynamic module in the program system ROHR2. The results of ROHR2stoss are inte-grated into the ROHR2 processing.The task of the program ROHR2stoss is the assessment of temporal varying load such as those induced by fluid hammer in pipe structures using the direct integration method of the differential equation. Linear as well as non-linear boundary conditions are considered.