(b)Satisfying Stress Limits
The limits on the tensile stress in the tendon, given in Table 6-1,are satisfied by choosing a conservative upper limit for the stress induced in the strand during tensioning.
In order tocheck the concrete stress limits given in table 6-2, it is necessary to investigate various stades in the life of the beam. Thus if we are considering the stresses at midspan of a simply supported beam, it is necessary to consider ai least the fllowing two stages: