In fire protection codes, what indicates that something is highly recommended but not mandatory?

In fire protection codes, the word "should" is used to indicate that a particular action or guideline is highly recommended but not mandatory. This terminology suggests that following the recommended actions is advisable for achieving safety and compliance, but it does not carry the weight of a requirement or obligation.

Using "should" allows for some flexibility and recognizes that there may be alternative solutions or circumstances in which adhering to the recommendation may not be possible or appropriate. This distinguishes it from terms like "must," which conveys a hard requirement that must be followed. Hence, when you see "should" in fire protection codes, it suggests best practices that enhance safety, even if they aren't strictly enforced.