The program enables the user, for any model of STRAP to define certain beams as posttensioned and also to define tension cables for slabs.

The user has full flexibility in defining the number of the cables and their shape. The program provides him easy to use tools for determining the number of the cables and their location in the cross section of the beam within the range of the allowable stresses.

Losses

The program calculates accurately all the types of the losses including the effect of the stressing of a certain beam on other beams that have been prestressed at an earlier stage. The losses along the time are calculated at time intervals.

Deflections and ultimate moments

For beams the program calculates the exact deflections. For beams and slabs the program calculates the ultimate moments and compares them with the actual moments in the model.

Shear

The program calculates the actual shear and checks it against the allowable shear stresses.

Time points

The user can define a table of time points and assign the posttensioning of certain cables to certain time points and also the effect of certain loads to certain time points.

Construction at stages

For such structures, the user can create few models and combine them by the COMBINE command of STRAP. The posttensioning program enables him to assign certain models that have been defined by the COMBINE command to certain time points. The program will calculate the prestressing stresses for the corresponding model.

Codes

The program is with accordance to the following design codes: EURO CODE, BS 8110, BS 5400, ACI, CSA, AASHTO, IS 466