Ifc not supposed to be empty

these two ifc files, zipped, import empty, although I know they contain geometry, on both windows and Mac. What to do?Archive.zip (76.4 KB)

stair 1: ifc-1.skp (344.0 KB)

stair 2: ifc-2.skp (297.9 KB)

oh thanks.
How did you do that ? :slight_smile: