Help! Could someone please make this object a solid for me?

I am taking a tech class this year that is using Rhino7. I need to make the object a solid (closed poly surfaces.) Currently, I have 21 naked edges. Can someone please fix this issue for me? I am a beginner at Rhino and do not understand too much about it.


Covid_Door_Opener.3dm (13.7 MB)

Your object has multiple internal surfaces - easier to re-create from the original curves than fixing it.

Select your 3 curves and run the _PlanarSrf command:

Select the resulting surface and run the _ExtrudeSrf command with Solid option and extrude to your desired thickness (also select the DeleteInput option if you don’t want to keep the input surface):

Result is a closed solid polysurface.