The first question I would be asking is : What are you putting in this
rather large drawer. The weight of the items inside can play a factor in all
of this. Enev with the best side mounted slides if the middle sags, your
done. If you even think that it will get loaded up with things, like
magazines by "acident" then three bottom mount slides would allow for even
the heavest load. Since we humans are REAL bad at predicting what will end
up in a draw, go for the heavest estimate. Good luck

PS, two smaller draws will help limit the junk collection that WILL happen.
"J Scarlett" wrote in message
news:LAJAh.985584$5R2.975180@pd7urf3no...
I'm building a built-in entertainment center and am trying to figure out
the best way to design the bottom drawer. The entertainment center is
approx 48'(1200mm) wide and 24'(600mm) deep. At the very bottom I would
like to put a single drawer that is 12'(300mm) tall.

What kind of slide mechanism should I use? Side/bottom/ball
bearing/roller? (The inside bottom is flat and solid so there is a large
flat surface to utilize)

I'm thinking that because of the size and weight of the drawer the bottom
mount would provide the best support, but I've never done any building
beyond framing so any help is appreciated.

Thanks
Jason