Q: I had a company put in the fire plugs on the doors to replace the lower bottom rods. Was this okay? They say that the plugs have a thermal-pin that will secure the door in case there was a fire.
A: You must be referring to fire pins… I cannot say if this is okay or not. That is up to the manufacturer of the fire doors. You are not allowed to modify a fire-rated door assembly other than what the manufacturer permits. If you haven’t already done so, contact the manufacturer of the door and ask them if fire pins are permitted to be installed in their door in lieu of the lower bottom rod after the door is installed.
The manufacturer achieves a listing from an independent testing laboratory for the fire-rating of their door assembly. If you modify that door assembly beyond what was tested and listed by the testing laboratory, then you have violated the listing of the door and the entire door assembly would need to be replaced.