I'm new to the topic of fireproofing in general. I work with metal buildings built from metal panels so I'm buying the "Fire Resistance Design Guide for Metal Building Systems", but in the mean time it would help if I can get a little help with a question I'm being asked. For a opening for an overhead door on a fire rated wall assembly, how can the fire rating be maintained on the support between the overhead door and the metal panel. Below is an illustration. Thanks in advance for any help on this.