How is fixed together? Is the chair glued? Screwed? Or stapled together? It is best to have all three, but any will be fine as long as the frame is made from hardwood. Knowing the sofa is held together firmly gives you the peace of mind that it won't fall apart while your child is sat or playing on the sofa. And less likely to be injured.
NOTE: if the sofa-bed with hollow frame is incorrectly laid on its back on a moving dolly, the frame may crack under the weight of the sofa-bed. Also, if you load anything heavy on or against one of these hollow sections - the fabric might deform permanently and this will damage the sofa.
Next, if this is a sofa bed - tie up the bed frame to the sofa frame. You can use any type of packing rope, moving strap, or make a tie up out of a packing tape.
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