Regardless, if you have a supported beam above the false ceiling beams, I suggest making them box beams and making them removable. Then you can hide a host of paraphenalia within the box beams.

I favor the idea of ceiling attachment points for stretching girls of any height up onto their toes. If you want full suspension capability, then engineer them properly. Not merely to protect the ceiling, but to keep your girl from getting dumped... because being unable to protect herself from a fall can cause very serious injuries.

Other than ceiling components, you might like a nice bookcase with hinges and rollers so you can open the cabinet behind where all your whips, cuffs, and chains are hanging.

You might consider a oversized backless divan or ottoman with tie downs all around. A lovely quilted cover will hide the kink factor. And one thing I found to be a delight was a waist high table. Working on a girl without having to bend over is a great relief on your back and sets her at "exhibition height" which is also a turnon for most girls.