Q: I’m confused… does the door frame in a fire door have to be labeled, when 100% sprinkled with 1-hour fire-rated assemblies are in place with a 45-minute labeled door ?
A: First of all… the building being sprinklered has no bearing on this issue.
Secondly, yes, the frame must be labeled as a fire-rated frame when the door assembly is a fire-rated door assembly. In other words, if the door itself is a labeled fire-rated door, then the frame also must be labeled.
Now, most fire-rated frames are identified with a label that says the frame is fire-rated… it will not say the frame is a 45-minute frame or a 90-minute frame. There are some exceptions to this, but most frames are not labeled with a fire-rating in minutes or hours… they are just labeled as fire-rated frames.