Set the general parameters

On the General Parameters page, you define the structure type, number and type of spans, and concrete mixes.

Set the general parameters as follows

Choose Two-Way as the structural system.
Check "Post-tensioned".
Set the number of spans to 3.
Check "Asymmetric strip".
Set the concrete mix for slabs and beams to 5000 psi [32 MPa for AS3600; C32/40 for BS8110 and EC2; M40 for IS 456].
Set the concrete mix for supports to 5000 psi [32 MPa for AS3600; C32/40 for BS8110 and EC2; M40 for IS 456].
Click Next to proceed to the Span Data page.