In this age of classroom shootings, many are looking for barricade locks - a cheap and easy stopgap to bolster door security.
Critics condemn barricade locks as dangerous and even deadly because they do not satisfy basic building codes, while proponents claim their simple operation and cheap price outweigh the risks.
Access dealers, worried parents, and school administrators alike have waited to see if building code exemptions would be made.
The world's biggest building code group have weighed all these arguments, and made clear their position in the upcoming 2018 edition of international building codes. Inside, we examine the changes, the proposed code, and where current barricade locks run foul.