Under the old calculation standards BBK the benefit was strength and various deformations according to standardized values for the external circumstances. In the transition to the common eurocode in January 2011 these terms changed to specific values of external circumstances and concrete strength for a more concrete custom calculation. This resulted in updated calculation software that have a problem with increased overbending with about doubled of the theoretical overbending. Tests to interpretation and calculation of shrinkage and creep conducted after a study of eurocode and a run through of the software PRE-stress basic knowledge to know how the program works and what values affect deformations. A superficial examination of BBK conducted so comparisons between the old and new calculation standards were identified. The first results were varied and it was hard to notice a system. Following advice from another thesis localized values that became more satisfying as calculated and given conditions. Expect the hike is a complex problem and given that manufacturers only provides a recommendation on how shrinkage and creep is allocated and eurocode can be interpreted in different ways, it becomes constructor individual interpretation and distribution that determines how large deformations PRE-Stress will present at calculations.