A
box-spring (or
divan in the UK) is a type of
bed base typically consisting of a sturdy wooden frame covered in
cloth and containing
springs. Usually the box-spring is placed on top of a wooden or metal bedframe which sits on the floor and acts as a brace, except in the UK where the divan is more often fitted with small castors. The box-spring is usually the same size as the much softer
mattress which is placed above the box-spring. Working together, the box-spring and mattress (with optional bed frame) make up a bed. It is common to find a box-spring and mattress being used together without the support of a frame underneath, the box spring being mounted directly on
casters standing on the floor. The purpose of the box-spring is threefold:
- to raise the mattress' height, making it easier to get in and out of bed;
- to absorb shock and reduce wear to the mattress; and
- to create a flat and firm structure for the mattress to lie upon.
