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Box-spring Queen size box-spring on metal bed frame 8-way hand-tied box spring. A box-spring (or divan in some countries) 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 that sits on the floor and acts as a brace ...
Modern spring mattress cores, often called "innersprings" are made up of steel coil springs, or "coils". The gauge of the coils is one factor which determines firmness and support. Coils are measured in quarter increments. The lower the number, the thicker the spring. In general, higher-quality mattress coils have a 14-gauge (1.63 mm) diameter.
The frame is made up of head, foot, and side rails. For heavy duty or larger frames (such as for queen- and king-sized beds), the bed frame also includes a center support rail. The rails are assembled to create a box for the mattress or mattress/box spring to sit on. Types include: platform – typically used without a box spring.
Prior to the early 1900s, springs were used as bed bases or box springs; these spring sets were not covered with fabrics. There were no "innerspring" mattresses manufactured until after 1900. Bushnell's patent has been cited [26] as an innerspring but it was an under bed spring--which in the mid-1800s was also called a mattress or base layer of ...
In the 19th century the bed spring was invented, also called the box spring. [10] In the 20th century United States, consumers bought the inner spring mattress, followed in the 1960s by the water bed (originating on the West Coast), and adoption of Japanese-style futons, air mattresses, and foam rubber mattresses and pillows.
These were later standardized as "queen" and "king", and first made a significant impact on the market in the 1950s and 60s. [29] Standard mattress depth ranges from the "standard" size of 9 in (23 cm) to "high contour" of up to 13 in (33 cm). Below are the standard ISPA widths and heights in the United States and Canada. [30] [31]
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