Mattress Support Board

dick12444

Member
We have a factory king size mattress. Would like to replace it, but my question is that the existing mattress overhangs the support board by about 3 inches on each side and and 4 inches at the bottom. I'm concerned that this board is not the right size for the king mattress and I should replace it, before replacing the mattress. Is this the norm with a king size mattress?
 
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