# Design Specification
The design codes for both steel and concrete design, and for loading.
# Definition
Steel Design
This is the code that will be used for steel member utilisation checks and design. Internal restraint rules can be established for the automatic generation of member restraints. A default steel grade can also be selected.
Concrete Design
The code that will be used for concrete slab design. Superseded codes can be included and default concrete and rebar models selected for the chosen design code.
The codes displayed are all the concrete design codes that GSA has available.
Load Design
Specified the design code used when generating load combinations.