This is difficult to explain but... Upstairs hallway that is 8ft in length. Two bedrooms and the staircase going down is inside the hallway.
There is a single smoke detector that is aprox 6 ft from the bedroom doors and 2ft from the edge of the wall where the staircase is...
The inspector is failing us because he says that the smoke detector that is 2ft away from the wall of the staircase is servicing the bedrooms therfore can't service the top of the stairs requirement.
He is reasoning this because there is a air supply vent 3 feet away from the smoke that is sitting over top of the stairs. The supply vent blows the air away from the hallway therfore it would blow any smoke away from the smoke detector so it doesn't count.
What does this guy expect, a smoke that will be directly overtop of the landing at hte staircase?
I challenged him on this and he looked at the NEC for bout 15 minutes after saying "Well here it says that it is required to have a smoke that is in accordance with 902.5 in the NFPA 5.0 and I am failing based on NFPA 5.0 902.5".
"If you can't beat him with the facts, baffle him with BS"
(edited for a heaping helping of Crow)
I opened the instructions with a Kidde alarm
LOCATIONS TO AVOID Smoke alarms should not be installed within 3 ft. of the following: the door to a kitchen, the door to a bathroom containing a tub or shower, forced air ducts used for heating or cooling, ceiling or whole house ventilating fans, or other high air flow areas.
[This message has been edited by Tiger (edited 08-24-2005).]
will you help clear up two things... #1 is this a vaulted area and the hallway being the top floor? I dont see why a smoke detector couldnt/wouldnt be able to serve as dual purpose smoke in such a design.
as far as the 3' from the air supply... what is the min. distance required? if that is it, then he doesn't need to predict the air flow because its already been taken into consideration by the experts therefore that distance has been established.
#2 doesnt the locations of the smoke fall under the building inspectors jurisdiction? or even the fire marshalls?
anyway thats how we do it here in my little neck of the woods in the pacific northwest.
going along with what gfretwell said, I'd ask him for a code reference requiring a smoke detector at the top of the stairs. All of the building codes with which I am familiar (IBC, IRC, UBC) require a smoke detector outside the bedrooms, but none of them require a smoke detector to "service the top of the stairs".
...a detector shall be installed in each sleeping room and at a point centrally located in the corridor or area giving access to each separate sleeping area. When the dwelling has more than one story, and in dwellings with basements, a detector shall be installed on each story and in the basement. In dwelling units where a story or basement is split into two or more levels, the smoke detector shall be installed on the upper level, except that when the lower level contains a sleeping area, a detector shall be installed on each level. When sleeping rooms are on an upper level, the detector shall be placed at the ceiling of the upper level in close proximity to the stairway.....where the ceiling heigth of a room open to the hallway serving the bedrooms exceeds that of the hallway by 24 inches or more, smoke detectors shall be placed in the hallway and in the adjacent room..."
As I read this, you have to put one at the top of the stairs.