I have a tempurpedic ergo queen adjustable base and a bed frame that has slats like this:
My bed got delivered before the frame, and when it was assembled they essentially assembled it around the tempurpedic base (without the slats), so essentially they are 2 independent pieces of furniture.
My question is, can I install the slats on the bed frame, remove the legs from the tempurpedic base, and let the base lay flat on the slats?
Hi reconstyle.
Welcome to our Mattress Forum. 
It is my understanding you want to layer the mattress atop the adjustable base, which in turn would be on top of the slatted frame. Is that correct?
I don’t know that the adjustable base would be functional if laying on a slatted frame. Generally when you have both a frame and adjustable base, you get a set up that looks like this.
Based on your description, I think that’s currently what you have. Is that right?
Can I ask why you’d prefer the base to be on top of the slats?
NikkiTMU
Yes, that is how my frame/mattress/adjustable base is currently setup.
The reason I want to lay the base on the slats is because I think the legs of the base are very ugly (my bed is situated in a way that it’s easily seen from common areas) and they clash with the legs of my bed frame.
reconstyle:
The Tempurpedic Ergo bases are zero-clearance approved, meaning they can work without legs and can be placed upon the floor or a properly supported platform bed.
From one of the Ergo manuals:
TEMPUR-PEDIC ERGO EXTENDTM + SLEEPTRACKER® SYSTEM fits easily
inside bed frames, furniture beds and platform beds that are certified to
hold a minimum of 1000 pounds. If using this adjustable base without
the legs and placing directly on a bed frame or platform bed, cross-bed
supports (slats) are strongly recommended to ensure TEMPUR-PEDIC ERGO
EXTENDTM + SLEEPTRACKER® SYSTEM maintains stability during operation.
My concern would be that from the line drawing you provided that your bed set might not be strong enough to properly and safely support this base.
Yep, unfortunately you are right - the bed is from Restoration Hardware and their customer support said the bed was not designed for what I was trying to do.
ok, I did some digging. RH lists the max capacity of the bed at 800lbs. Per tempurpedic, the queen base weighs 225lbs, and the mattress I have weighs 102 lbs. That leaves me with 473lbs of weight for everything else. The weight of the people in the bed will never exceed 350lbs.
Am I overlooking something here?
reconstyle:
Per the manufacturer, the bed set isn’t designed to support an adjustable bed base (which would be the case with most bed sets), so that should be the definitive opinion, regardless of the weight limitations listed for the bed set. The contact points of the frame of the adjustable bed base are different from where box springs / foundations would contact the support network of the bed set. My concern would be that in short order you’d have a broken bed set and most likely a broken adjustable bed base, with no recourse to either manufacturer.
I’d suggest looking at other options that don’t compromise structural integrity or safety to satisfy your desire for a different cosmetic appearance, such as a valance placed inside the perimeter of your bed set hiding all of the mechanics of the adjustable bed base. If you were a customer in my store I would work very hard to talk you out of your idea of placing this upon your bed set.