In the video below, a nice explanation of why stairway platform lifts are not the preferred option for wheelchair users and people with limited mobility. While these devices provide access in buildings where passenger lifts are not an option, they are best limited to retrofits of existing buildings. There should be no reason for designing these costly and awkward devices into new buildings. From a universal design perspective it usually means some critical thinking got lost at the design concept stage. These devices provide access in a technical sense, but they don’t provide equity of access, particularly as they need to call someone in the building to come and unlock and operate the device. So generally they will be avoided where possible. That might mean not using the building at all. Think of the potential commercial and social consequences of that. The video below from CERTIS Learning shows how these devices work and why they should be avoided.