okay first of all, what are these things? their called slatted bed bases, what are they for? whats their purpose? and i don't understand are they supposed to bend the mattress or something?
slatted bed bases are for support, so your mattress doesn't fall through the bed frame. yes, you need it. Depends on the bed frame. Most Ikea bed frame should be compatible to regular mattresses but I've seen some that don't fit. FYI Ikea beds aren't that great unless it's for the guest room. I recommend going to bed factory outlet store, you'll get a good deal there.
I have an IKEA bed frame and used to have a mattress...the mattress from IKEA was terrible, i ended up with this huge dig in the middle and gave it to the Salvation Army, any mattress will fit, but you cannot use a box spring. As far as the slats, my bed frame ( a queen) has a metal brace down the middle and a metal rim that runs all the way around. I use one roll of slats on each side of the brace and throw the mattress on top. The slats basically hold the mattress. have you been to an IKEA store? You can touch, play, and jump on the beds there and you'll see. But DO NOT buy an IKEA mattress....worst purchase I;ve ever made...but i love everything else from IKEA!
