March 15, 2019
I have a B occupancy building. One half is Oral Surgery Office and the other half is an Ambulatory Care Facility (ACF). I think I can sprinkle only the the ACF half if I divide the two sides with a fire barrier. I didn't think so using code only, but if you review the Commentaries it seems to change the circumstances. The local building official and fire marshal interpret the way I do but the ICC phone line says I must sprinkle both sides based on 903.2.2 only:
903.2.2 Ambulatory care facilities. An automatic
sprinkler system shall be installed throughout the entire
floor containing an ambulatory care facility where either
of the following conditions exist at any time:
(commentary says: "The sprinkler requirement is limited to the floor
area that contains the Group B ambulatory care facility")
But when you take the commentaries in to consideration and these sections, it looks different.
422.6 Automatic sprinkler systems. Automatic sprinkler systems shall be provided for ambulatory care facilities in accordance with Section 903.2.2.
(commentary: The entire fire area meeting either one of the criteria must be sprinklered.)
And lets look at the definition for Automatic Sprinkler System:
….. The system is usually activated by heat from a fire and discharges water over the fire area.
What is fire area?
FIRE AREA. The aggregate floor area enclosed and
bounded by fire walls, fire barriers, exterior walls or horizontal
assemblies of a building. Areas of the building not provided
with surrounding walls shall be included in the fire area
if such areas are included within the horizontal projection of
the roof or floor next above.
707.3.10 Fire areas. The fire barriers or horizontal
assemblies, or both, separating a single occupancy into
different fire areas shall have a fire-resistance rating of
not less than that indicated in Table 707.3.10.
Table 707.3.10 requires 2 hour separation of fire areas in B occupancy.
I know I could just go with the local AHJ's opinion but we specialize in these types of buildings and it will come up again.
I would appreciate clarification.
Most Recent Topics
- Plumbing Rough-In and Plumbing Top-Out
- IBC Chapter 17 Special Inspection - Permitting
- Outlet for HVAC
- Ratings of Electrical rooms
- Trouble with online test taking. PRONTO and Webcam issues.
- Welcome Back from Astoria, Oregon
- 2012 IBC 424.5 Children's Play Structures area limited to 300 SF
- inspection software?
- Definition of occupied spaces
- Professional licensing when responding to disasters