The prestress response is calculated based on the tendon force after losses. The loss of prestress in the analysis is based on short-term and long-term losses. The short-term losses are calculated at Initial case, considering the anchor set and friction losses explained earlier. The Initial stage does not include any elastic shortening losses. The long-term losses depend on the loss type selected for the analysis. These can be lump sum, or time dependent methods.

The lump sum loss is based on a specified fixed amount of stress; however, since CIP RC/PT Girder uses transformed section properties, the effective loss of prestress is slightly less than the specified amount.

The time-dependent method includes the calculation of creep, shrinkage, and relaxation strains based on the material properties and equations. The effect of these strains on the tendon stress is calculated automatically by using transformed sections. CIP RC/PT Girder uses a time of 10,000 days for calculating the ultimate creep and shrinkage effects; therefore, the effective strains may be slightly less than what is specified as ultimate values.