When defining steel joist floor slabs (within the "Enter panel" window), the user must select the "Selected floor slab" from those available on site. The controls on the right allow you to "Add", "Delete", "Copy" or "Edit" these floor slabs.

When you use these controls, the program opens a window where you can configure each steel joist floor slab.

Here, a "Reference" is first entered for the floor slab.

Next, select the type of "Form" to be used in the floor slab. A designed section of the selected form is displayed in the centre of the floor slab editing window.

The following parameters are defined below:

• the "Thickness of the compression layer (a)";
• and the "Rib spacing (c)" between joists;

At the bottom, you can select whether the steel section to be used are of the "Double T" or "Single T" type. Next, the two drop-down menus at the bottom allow you to select the "Section series" to be used in the panel and the "Starting section" for the panel’s joists.

The controls to the right of "Section series" allow you to add, edit or manage the section series available in the project in a list.

In this list, as well as entering data manually and importing and/or exporting it to files on the hard drive, it is also possible to perform the "Import of predefined section series" from various catalogues and reference guides included in the program, as well as to download and "Import manufacturer catalogues" from the Open BIM Database.