Under the Load Cases, select the Additional Settings tab, and activate the “Live load is less than or equal to 100 psf” option (Image 01).
Next, select the Design Situations tab and Edit Combination Wizard. Activate the “Exception 1 according to 2.3.1” option under the Standard Options (Image 02).
Under the Load Combinations tab, the load factor 0.5 is listed in the applicable COs (Image 03).