The other issue with the hollow bars is that if enough weight was placed on a spot they would begin to bend. The issue became so bad that a 90 day warranty was put in place by most manufacturers of these frames. Another issue the black metal frames suffered from were bending stretcher bars or rails. Again the hollow nature of these strecther rails presented issues with breakage and bending.
It was soon discovered though that these frames were not such a bargain that they appeared to be. The first problem with black metal frames is the round metal bars that make up the seat and back sections of these frames. Where as wood futon frames are using flat slats, black metal frames have hollow round bars. Thinner mattresses would slide through the gaps between the round bars. On wood futons this was never a problem.
At first it was widely regarded as a great addition to the futon family of products. Finally, a futon that could be offered at a much a lower price point. Black metal frames were being imported from China, Malaysia and Taiwan. Many of the early black metal frames were packaged with an import mattress made up of ground up textile materials and a colored covering with tufts. These packages were often anywhere in price from $199 - $249 and started out in specialty futon shops as a great way to introduce customers on a budget into a lower priced futon option.
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