Single and multiple tendon prestress wizards calculate equivalent nodal loading due to tendon prestressing or post tensioning and assign these forces automatically to beam, plane stress or solid elements of the model for the current active loadcase. Computation of tendon forces can currently be carried out in accordance with AASHTO-LRFD, BS5400, Eurocode EN1992 and JTG D62-2004 design codes.

• The ability to input many hundreds of tendons in one analysis that can be assigned to many hundreds of loadcases is made easy by the use of the multiple stage prestress wizard. Through a series of dialogs, the wizard simplifies the definition of tendon profiles and properties.
• Elastic shortening losses can be specified for multiple stressing stages – useful for staged construction. Locally defined tendon profiles can be used anywhere in the model and any number of times. One very useful feature allows the tendon profile to be viewed in real-time as it is defined. Tendon material properties including short and long term losses can be specified. 
• The tendon can then be easily assigned to one or more line features on the model and, more importantly, to one or more loadcases at the same time.

Basic, Smart and Code-specific load combination facilities are  a key feature of LUSAS Civil & Structural and allow manual or fully automated assembly of design load combinations. From these, envelopes, contour and deflected shape plots, and results graphs can be readily obtained for any loadcase under consideration.

• Basic load combinations allow for manual definition of loadcases and load factors.

• The Smart Combinations facility, unique to LUSAS Civil & Structural, automatically generates maximum and minimum load combinations from the applied loadings to take account of adverse and relieving effects, saving time and reducing the chance of errors.