Support of horizontial fire separations.

[khsmith55]

Given a steel framed, three story building with a basement, of Type II-B Construction, non-seperated mixed use under the 2006 Edition of the International Building Code. The second floor will be health care facility and therefore regulated further by NFPA 101-2000 (LSC). Section 18.1.2.1(2) of the LSC requires a 2 hour separation of the second floor from the first and third floors. The horizontal separation(s) at the third and second floors will be a listed 2 hour floor/ceiling assembly of fireproofed steel beams and a fire proofed composite concrete floor system. All steel columns supporting the 2 hour rated horizontal separation(s) will also be fire protected with a listed 2 hour assembly continuous from the third floor to the foundation wall or isolated column pads (at interior columns). Since the "interior" columns penetrate and provide support for the non-rated first floor system will there be any special requirements besides the continuous fire protection on the columns.

 

[Coug Dad]

I realize you are under the 2000 LSC as a condition of CMS but the 2009 LSC does not allow new health care occupancies on the second floor of a Type II (000) building. Your building's construction type should really be upgraded for conform to Table 18.1.6.1 in the 2009 LSC.

 

[khsmith55]

Coug,

Thanks for the “heads up”, got me worried a bit so I went back thru my notes. I mis-stated the Occupancy, the possibility exists to have an “Ambulatory Health Care Occupancy”. It would appear according to LSC-2009, Table 20.1.6.1 would permit Type II(000), sprinklered for the “Ambulatory Health Care Occupancy”.

Again, thanks for the information.

Ken

 

[Paul Sweet]

I'm not sure if it's a code requirement or state building official interpretation, but state buildings in Virginia have to have fireproofing extended onto non-rated beams for 2 feet from rated columns.