There is a limited number of structural materials when placing slabs. How to add new materials into the list?
Step 1: Go to the Configuration Variables dialog, search for the configuration variable PS_MATERIALFILE and check the path that is defined. To access the Configuration Variables dialog,you can use the search field in ribbon bar and then search for "Configuration Variables".
Step 2: In Windows File Explorer, navigate to the path defined above and open the file named ProStructuresMaterial.mdb using MicroSoft Access.
Step 3: After opening the file, under Tables section you will see different option, but in the example we will select Concrete and add new materials under the concrete table.
Step 4: Scroll down the concrete table add a new index such as 1700 as from that point onwards you would be adding the new materials like the below image.
Step 5: After adding your materials, save the MDB file and then restart OpenBuildings Designer. Now if you start placing a slab, under the Structural| Material you will be able to see the new list.