A bed foundation is a solid platform made of usually made of wood or steel that helps absorb pressure and body weight. A foundation can include a box spring, platform or an adjustable base, which all help reduce wear and create a flatter surface for your mattress by elevating it off the floor. Most foundations are constructed with wooden slats or steel torsion bars to keep your mattress in place. Wooden slats create firmer support than torsion bars, which provide a little more give.
A box spring is a durable wooden frame containing vertical springs that raise the height of a mattress, which reduces wear and creates a flatter surface while you lie down. A box spring cuts down on mattress wear by absorbing pressure you exert while sleeping or getting on and off the bed. Most box springs are covered in cloth and are mounted on top of a metal or wooden bedframe. A standard box spring is 9 inches tall, but it is also available in lower profiles as short as 5 inches to accommodate thick mattresses.
A bed frame, also known as a bedstead, supports a mattress and box spring by raising them off the floor, creating a more comfortable height when getting in and out of bed. A frame is typically is designed with two durable legs at the head of the bed and two at the foot of the bed. However, larger beds, such as queen and king sizes, usually have frames with middle support legs to provide additional support. A headboard, footboard or canopy can be attached to your bed frame, which allows you to decorate your bedroom freely.