This International standard provides recommendations for the installation and use of textile floor coverings on stairs for both residential/domestic and contract/commercial purposes. It covers all products composed of textile material with a pile or non-pile use surface including the use of such products in tile form. NOTE In many split-level dwellings, a room may have one or two steps between different levels. This situation differs from a stairway in several important respects: — the steps are usually wider and therefore traffic intensity in any one place is usually less; — the carpet may be bent over steps in either the machine direction or the across-machine direction. On a stairway, it is normal practice to lay the carpet with the pile lying down the stairs.