A bed frame or bedstead is the part of a bed used to position a mattress or box spring set off from the ground. Bed frames are typically made of wood or metal. A bed frame is made up of head, foot, and side rails. For queen- and king-sized beds, the frame includes a center support rail that runs parallel with the side rails. When assembled, the rails create a box on which the mattress or mattress/box spring set sits. In some bed frames, slats are positioned perpendicular to the side rails to provide additional support. A double bed A bed is a piece of furniture or location primarily used or intended for sleeping upon, but which can serve other functions, a double bed can be used for sexual intercourse and relaxing as well. ... This article or section does not cite its references or sources. ... Trunks A tree trunk as found at the Veluwe, The Netherlands Wood is derived from woody plants, notably trees but also shrubs. ... Hot metal work from a blacksmith In chemistry, a metal (Greek: Metallon) is an element that readily forms positive ions (cations) and has metallic bonds. ...

Types of bed frames:

Platform 

typically used with only a mattress in place of a box spring

Captain 

drawers are set beneath the bed frame to make use of the space between the bed frame and floor

Waterbed 

heavy-duty rails and slats built specifically to support the weight of the water in the mattress

A waterbed or water mattress is a bed or mattress filled with water. ...

Headboards, footboards, and bed rails

Though not truly within the defintion of a bed frame, most people include headboards, footboards, and bed rails when speaking of bed frames. Headboards and footboards can be made of wood or metal that is stained, painted, or covered with fabric or leather. Bed rails are usually made of steel or iron. A headboard is an item of furniture. ...

While most bed frames are constructed to have a headboard attached to it, they are not constructed for footboards. For beds with headboards and footboards, the frame is made up of bed rails that are attached to the headboard and footboard with slats positioned perpendicular to the bed rails to hold and support the bed.