The TGB 1990 is applicable to steel and concrete design calculations.

Steel Calculations

Cross-section Check
Stability check
Power Inducing

Concrete Calculations

The concrete calculations are based on NEN 6720 and ROBK 6 
There are ten spreadsheets for concrete available among which:

Reinforcement at moment and normal force
Reinforcement on shear and torsion
Punch check
Column design round cross-section
Temperature Penetration
Design Console (straight / angle )