Different types of upholstery springs are used for different types of furniture. Coil and sinuous springs are used for chairs and couches, while Marshall springs are used in mattresses. The size and gauge of the spring can be adjusted to fit the furniture in question and to different levels of softness and firmness.
There are different types of upholstery springs that are designed for different types of furniture. Couches, chairs, and mattresses are examples of furniture that uses springs. The springs are usually located in the body of the furniture, covered by padded material for comfort. The purpose of these springs is to provide resilience and firmness as well as absorb shock.
Coil upholstery springs are used in chairs and couches. This type of spring is considered to be the best on the market and is made of coppered steel. They can often be found in new, high-end furniture as well as antiques. Coil springs have a reputation for outlasting the seats in which they are installed.
Sinuous, also called zig-zag, upholstery springs are also used in chairs and couches. Sinuous springs are called zig-zag springs because the metal goes back and forth in a zig-zag fashion. They are attached to the seat in parallel lines, which are linked together for strength. These springs do not last as long as coil springs, but they are used more often because they are less expensive to make.
Marshall upholstery springs are mostly used in mattresses. These springs are made of steel and are enclosed in fabric. A firm mattress can be produced by precompressing Marshall springs. The more firm a mattress is, the less movement on one side will affect the other.
There are different types of spring gauges within each of the above types of upholstery springs. With coil springs, gauges range from eight to 11, whereas sinuous springs range from eight to 13. Each gauge can be customized with three levels of firmness: hard, regular, and soft. The sizes of the springs can range from about 3 inches (76.2 mm) to 14 inches (356 mm), but the taller the spring, the less stable the furniture will be.
Different types of upholstery springs are sometimes categorized by what type of furniture is being built or restored. For example, furniture springs are used for seating, while pillow springs are used for arms and backs of chairs or couches. Car seating uses springs called cushion springs or auto springs.