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Old 03-21-2011, 09:31 PM   #1
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Code for smoke detector


What is code requirement for location of hard-wired bedroom detector on bedroom ceiling with 8/12 pitch How close to highest point on ceiling and how far from wall?

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Old 03-21-2011, 09:35 PM   #2
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Code for smoke detector


read this post from stubbie:

This is pretty close for all parts of the country. Taken From the US home inspectors website

Where to Place the Detectors
It is important to properly place the smoke detectors in the home. In most locations throughout the U.S., smoke detectors are required in all new homes. The number and location are listed below:

Number and Location Requirements
  • The minimum standard as stated in the National Fire Prevention Association's National Fire Alarm Code (NFPA 72): There should be a smoke detector on every level of the house, including the basement and outside every bedroom.
  • New homes require hard-wired alarms to be interconnected so that if one alarm is activated, all alarms will sound the alarm signal.
  • New homes require smoke detectors in every bedroom.On floors without bedrooms, smoke alarms should be installed in or near living areas, such as family rooms and living rooms.

Placement Requirements
  • As stated by the NFPA: "Since smoke and deadly gases rise, alarms should be placed on the ceiling at least 4 inches from the nearest wall, or high on a wall, 4-12 inches from the ceiling. This 4-inch minimum is important to keep alarms out of possible "dead air" spaces, because hot air is turbulent and may bounce so much it misses spots near a surface. Installing alarms near a window, door or fireplace is not recommended because drafts could detour smoke away from the unit. In rooms where the ceiling has an extremely high point, such as in vaulted ceilings, mount the alarm at or near the ceiling's highest point."
Additional Guidelines for Installation
  • If you sleep with your bedroom doors closed, it is recommended that a smoke detector be installed inside each bedroom. Alarms should also be installed in other areas of your home where people sleep.
  • Wired systems should not be connected to a circuit that could be turned off with a wall switch.
  • Plug-in systems should have a restraining device at the outlet to prevent the plug from accidentally coming loose.
  • Hard-wired systems should be installed by a qualified electrician.
  • Do not install the smoke detector near windows, doors or forced-air registers where air flow would interfere with the operation of the detector.
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Old 03-22-2011, 12:50 PM   #3
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Code for smoke detector


You mention hard-wired detectors a couple of times, but I don't think you make the point that in new construction, hard-wiring is a code requirement. You cannot use detectors that are just battery powered.
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Old 03-22-2011, 01:56 PM   #4
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Code for smoke detector


I have to disagree with the "highest point" in a room with a vaulted ceiling.

check out the diagram at this link

http://www.springfieldfirema.org/for...ction-form.pdf

there is a dead air space at the peak. You need to be within 3 feet of the peak. The diagram shows 4" in vertical height from the peak minimum. Typically I have used 12" linear measurement from the peak as desirable. Depending on the the angle of the ceiling, it results in about the same placement.
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Old 03-22-2011, 02:29 PM   #5
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Code for smoke detector


No mention of CO detectors in Stubbie's post? Is that a Massachusetts only thing?
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Old 03-22-2011, 03:04 PM   #6
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Code for smoke detector


Quote:
Originally Posted by Clutchcargo View Post
No mention of CO detectors in Stubbie's post? Is that a Massachusetts only thing?
You would have to contact Stubbie and ask him about thatů
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Old 03-22-2011, 03:21 PM   #7
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Code for smoke detector


You need at least one carbon detector on the second floor. depending on how long the hallway is and where bedrooms are located you may need two. You need to add a carbon on the first floor if there is a bedroom on said floor. As for the smoke on a vaulted celing I normally put mine a foot off the highest point of celing as smoke rises up obviously.
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Old 03-22-2011, 03:54 PM   #8
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Code for smoke detector


I would check with your AHJ for smokes and co placement. We require co's on every habitable level.
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Old 03-22-2011, 03:59 PM   #9
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Code for smoke detector


It varies state by state, normally its how I stated originally.
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Old 03-22-2011, 05:45 PM   #10
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Code for smoke detector


Quote:
Originally Posted by Clutchcargo View Post
No mention of CO detectors in Stubbie's post? Is that a Massachusetts only thing?
It is not just a Massachusetts law. I believe at this time half the country requires CO detectors.
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Old 03-22-2011, 06:28 PM   #11
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Code for smoke detector


Nah whole country requires it its code

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