ATAB-Trappan AB is a staircase manufacturing company located in Agunnaryd, Sweden. Founded in 1924 by Karl Magnusson, the company has a long history in furniture manufacturing and carpentry. Initially focused on various carpentry services, it shifted its primary production to stairs, windows, and doors over the years. The company has evolved through several ownership changes and is known for its high-quality, customizable staircases, which are designed to meet customer specifications in terms of design, color, and wood type.