When assessing the quality of a frame, you must check to see if the frame is heavy and sturdy. When you convert the frame sofa to bed or vice versa, you want to make sure that the arms are are still touching the ground. The heavier the frame, the easier it is for the body to make a smooth transition from sofa to bed. Keep in mind that the body of the frame and the arms are two separate pieces. The body of the frame contains the the slats that go across the seat deck and back rest.
Usually, the heavier the arm, the sturdier the frame, be it hardwood, or solid oak frames. The oak frames not only provide more stability and support, but also have an aesthetic luxurious look. Oak frames are a bit more in price than regular hardwoods, but you get what you pay for. A long lasting durable frame that you can show off for years to come in. Also you can tell the quality of the frame by how long the manufactures warranty is. For instance, the solid oak Manhattan Cherry Futon Frame by Gold Bond, comes with a 5 year warranty. That doesn’t mean it will only last five years. What that means is that if something were to go wrong, it would most likely occur after five years.
As long as you know how to convert your futon frame correctly and you tighten the screws of the arms every few months, your oak futon frame should give you many years of life and function.