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.
The flexibility of an inner spring futon mattress is quite poor, but you would only really buy this type of mattress if the futon is going to be used as a bed most of the time. Futon beds are a popular choice for many consumers due to their flexibility of function. Before buying a top rated futon bed mattress make sure that the qualities - mentioned above - of the mattress are what you require. If you know exactly what you want before you buy you are going to avoid being disappointed with the purchase of your futon bed.
The hinges were attached to the arms of the futon frames with two bolts and two nuts. While this design was OK the hinges themselves would fail when too much weight was applied to one side or the other. These would also bend out rendering them useless in the operation of the futon. Most specialty futon retailers pay little to no attention to black metal futon frames. Retailers Ive spoken to have said that the black metal futon frame is the number one service headache when it came to futons with over 95% of service issues being the failure of a black metal frame component.
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