Clothes drying rack hanger

I wanted to hang the clothes drying rack because my cleaning robot kept tripping them over and made a ruckus during night or trap itself in the room, so I designed these hooks to mount them on the ceiling. 

Print like shown in the pictures. 
Print with 6 or more perimeters and 4 top and bottom layers to get a strong hanger. 
I printed mine in PLA and is still hanging there.