Code 5491 applies to employers engaged exclusively in wallpaper hanging operations.  Lightweight or heavyweight, patterned or solid color wallpaper, some with adhesive backings, some with vinyl coating, grass cloth etc., are used to cover interior walls of rooms in both residential and commercial buildings.  Prior to the actual installation work, the wall surfaces must be cleaned and scraped of old paint or wallpaper, dirt, grease and other residue to ensure adequate adhesion.   Sometimes the cleaning requires more advanced methods such as the use of chemical strippers and heat guns to remove residue from the wall surfaces. 

Bill posting on buses, bus shelters, subway cars and on station platforms is also included under this classification.