You can skim the term "architectural barriers" in 3 definitions:
all those physical obstacles, sources of discomfort for mobility with particular reference to those who, for any reason and / or cause, have reduced mobility or impeditea on a temporary or permanent basis;
the lack of reports and measures that allow the recognition and orientation of places and sources of danger to anyone. Especially for the visually impaired, the deaf and blind (09/07/88 DM Interior - art. 3);
all obstacles that prevent and / or limit anyone the comfort of residents and the safety of use of parts, components and equipment.