Post-tensioned voided slabs

All the advantages of the post-tensioned slabs!
All the advantages of the voided slabs (mass reduction)
LESS post-tensioned forces (stressing less critical, less efforts in the vertical structure)
Simplicity in the passive rebar
Formwork total stripping in +2 days (stressing at 18-20MPa)
Apt for construction methods
Optimal cost reduction
ACTIVE-PASSIVE System