A double bed frame is sometimes more commonly known as a full bed frame; the dimensions of both types of beds are identical, so if you are having trouble finding a double bed frame, you will probably be able to find a full bed frame instead. Many of these frames are adjustable as well so you can accommodate either a double bed or a twin. Higher-end models tend to refrain from adjustability. It is best to consider your budget and your functional needs for the bed before going shopping for the model that's right for you.
The materials used to make the double bed frame are perhaps the most important considerations you will need to think about before purchasing. Hardwoods are usually the most expensive options; oak and mahogany, for example, are hardwoods that are very beautiful, not to mention exceptionally durable. If hardwoods are out of your price range, you can consider some softwoods such as pine, but keep in mind that softwoods can be more susceptible to damage such as rotting and cracking. Buyers on a tight budget might want to consider a double bed frame made from steel.
Steel frames can be high-end or low-end, depending on the design. The least expensive steel frames will feature neither headboards nor footboards, and they will generally be made from lower-end steel. They are not especially attractive, but they can be concealed very easily using a bed skirt. A higher-end steel double bed frame will feature thicker gauge steel that is stylized and designed to be more attractive. Such beds are likely to feature steel headboards and footboards as well, which means the bed frame will take up more space in a bedroom. If you choose a steel frame, be sure it features legs or casters that have plastic feet that will not scratch up wood floors.
Sometimes the double bed frame will be designed to work without a box spring. Such beds are known as platform beds, and they tend to sit lower to the ground. Platform beds allow for more storage space underneath the bed if the frame is high enough off the ground, and in some cases, the frame will feature slide-out drawers for added convenience. This type of double bed frame has a distinctive look that can transform the aesthetic of a room, but it may be difficult to get into and out of for some people.