Q: We have a connecting bridge between two of our buildings. On one side of the bridge is healthcare occupancy and on the other side is business occupancy. There is a 2-hour fire rated barrier between the bridge and the healthcare occupancy building. We have offices on the bridge, which are protected with sprinklers. What would the requirements be for these offices since they open into the egress corridor?
A: Since you have a 2-hour occupancy separation between the healthcare occupancy and the business occupancy, then you treat the bridge as if it is a corridor in a business occupancy. Each corridor has to have two exits, which in your case, one exit would be into the business occupancy building, and the other exit would be into the healthcare occupancy building. The offices on the bridge would have to meet the requirements for separation found in the business occupancy chapters. For new construction business occupancies, section 188.8.131.52 of the 2012 LSC requires the corridor walls to be 1-hour fire rated, unless one of the following is met:
- Exits are available from an open floor area;
- The space is occupied by a single tenant;
- The building is protected throughout by an automatic sprinkler system.
For existing construction business occupancies (construction design approved prior to July 5, 2016) there are no requirements. However, if constructed between March 11, 2003 (the date the 2000 LSC was adopted) and July 5, 2016, a surveyor could expect that you be compliant with new construction requirements.