How To Rectify Non Compliant Fire Doors
Fire doors must be installed to AS1905.1 or as per tested or assessed, which included the allowable gaps around the stiles, head and base of the door. The tech sheet describes the maximum allowable gaps on both new and old doors, and acceptable rectificaiton methods.
There are only a few allowable methods for upgrading non fire rated steel door frames to suit fire rated doorsets. Please see tech sheet which describes how this can be done.