The Fire Marshal issued a number of violations during the inspection. Some of these were for the failure of the unit entrance doors to close quickly. These doors are fire-rated and, as you can imagine, are designed to help block smoke and flame. This is a tutorial on how to adjust the spring hinges so that they comply with the Fire Code.
There are two types of spring-hinges. Follow the instructions below that are for the type you have but do so at your own risk!