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where should smoke detectors be placed in a cathedral ceiling

by Prof. Dedric Walker Published 2 years ago Updated 2 years ago

On a peaked, gabled, or cathedral ceiling, install the first Smoke Alarm within 3 feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke Alarms may be required depending on the length, angle, etc. of the ceiling’s slope. Where do smoke detectors go on vaulted ceilings?

Sloped Ceilings (Peaked Ceilings): Smoke alarms or smoke detectors mounted on a peaked ceiling shall be located within 36 in. (914mm) horizontally of the peak, but not closer than 4 in. (102mm) vertically to the peak.

Full Answer

Where should smoke alarms be installed in a basement?

Smoke alarms installed in the basement should be installed on the ceiling at the bottom of the stairs leading to the next level. Smoke alarms should be installed at least 10 feet (3 meters) from a cooking appliance to minimize false alarms when cooking. Mount smoke alarms high on walls or ceilings (remember,...

How high off the wall should a smoke detector be?

Mount smoke alarms high on walls or ceilings (remember, smoke rises). Wall-mounted alarms should be installed not more than 12 inches away from the ceiling (to the top of the alarm).

How do you hang a smoke alarm from the ceiling?

If no smoke alarm is already installed at this location: Drill two holes in the ceiling, spaced like the holes in your ceiling plate. Attach the ceiling plate to the ceiling with two screws. Use drywall anchors if needed to get a sturdy enough connection.

Why are smoke detectors not placed on the ceiling?

Many experts point out that smoke alarms should not be placed on the ceiling, but instead high up on the walls. The logic for this is that some types of fire will fill the ceiling areas with chemical gases that push the smoke downward slightly. By positioning the detectors at roughly 12 inches below the ceiling,...

How do you smoke detector in a vaulted ceiling?

Gently push the alarm upward along the ceiling, until enough magnets disengage and the alarm is resting in the carrier. Holding the arm vertical, telescope it down until the smoke alarm is safely in your hands.

What is the best location for smoke detectors?

Smoke rises, so mounting smoke detectors high -- usually on ceilings -- is the best option. If you choose to mount a smoke alarm on a wall, placing it less than 12 inches from the ceiling would be best. Find a spot away from air ducts, windows or anywhere with a draft that could keep smoke from reaching the detector.

Should smoke detectors be on wall or ceiling?

Mounting the smoke alarm on the ceiling in the center of the room places it closest to all points in the room. Ceiling mounting is preferred in ordinary residential construction. However, in mobile homes, wall mounting on an inside partition is preferred to avoid the thermal barrier that may form at the ceiling.

How many smoke detectors should you have?

According to the National Fire Protection Association (NFPA), smoke alarms should be installed on every level of your home, including the basement. Fire detectors should also be installed inside of every bedroom and outside of each sleeping area.

How far should a smoke detector be from a bedroom door?

2:133:45Where to Put a Smoke Alarm or Smoke Detector in a BedroomYouTubeStart of suggested clipEnd of suggested clipAnd 36 inches down. You can mount the smoke alarm in this area. The preferred place to mount a smokeMoreAnd 36 inches down. You can mount the smoke alarm in this area. The preferred place to mount a smoke alarm is. The center of the room.

Where is the best place to put a smoke and carbon monoxide detector?

Carbon monoxide (CO) and combination alarms should be mounted in or near bedrooms and living areas, on a wall place six inches below the ceiling to six inches above the floor. If mounting on a ceiling, make sure it is at least six inches away from the wall.

What is the job of a smoke alarm pole?

Its job is to hold the smoke alarm in place on the ceiling, in a way that lets you remove and replace it when you need to. The arm. It's the contraption that enables you to put up and take down the alarm while standing on the floor. A pole, which spans the gap between you and the alarm on the ceiling.

How to position an alarm at take down time?

The key to positioning at take-down time is to make sure that, at the lower edge of the alarm, the rim of the mounting plate is be resting on the rim of the carrier. Gently push the alarm upward along the ceiling, until enough magnets disengage and the alarm is resting in the carrier.

Why does my alarm chirp?

The alarm starts shrieking or chirping for some attention. Maybe it's a false alarm, so you need to take it outdoors to air out. Maybe its battery is dying. Maybe it craves some other kind of care. Whatever - it's not gonna shut up until you get it down from its lofty perch and give it the hands-on care that it is crying for.

What is the best way to carry a smoke alarm?

A better carrier would be one that is more like a hand with fingers that can actively grab the smoke alarm rather than just passively cradling it like the fruit-picker does. But for this you need a pole that will let you open and close the fingers while standing on the floor with the pole fully extended. Some fruit pickers ( https://www.doitbest.com/products/701881) and branch trimmers ( https://www.amazon.com/dp/B00004TBMV?psc=1) enable you to operate the tool at the top of the pole from a handle at the bottom - maybe you can get creative with one of these.

How to attach magnets to alarm?

Attach the magnets firmly to the alarm base. Use stick-on magnets and/or attach them with super glue.

How to get an alarm to hang on the ceiling?

Holding the arm vertical, telescope it out to its full length. Twist the pole segments to lock them in place. Raise the arm until the alarm is aligned with the ceiling plate. When you get the alarm close enough, the magnets will lift it out of the carrier and hold it on the ceiling.

What is a ceiling plate?

Ceiling plate. A flat metal ( not plastic!) plate that can be attached permanently to the ceiling. The magnets on the alarm base will grab onto the ceiling plate to hold the alarm in place. I recommend using an outlet concealer - a round metal plate that is used to cover electrical junction boxes that are no longer in use - as your ceiling plate. I used a Westinghouse model 70065 ($6). It's just the right size, shape, and material for this purpose.

Where should smoke detectors be placed?

According to the NFPA, the best place for smoke detectors is inside and outside the bedrooms and on every level of your home, including the basement. Depending on the size of your home, you may need several smoke detectors. Dual-sensor smoke alarms throughout your interior would most effectively detect both types of early fires.

Do smoke detectors need to be replaced?

If you properly maintain your smoke detector by replacing the battery annually, you won't normally need to replace the whole device. However, some smoke alarms come with a nonreplaceable battery installed. They typically last for 10 years. If the alarm on this type of model chirps, the battery is low and it's time to replace the smoke detector.

What is the best detector for a smoky fire?

A photoelectric detector measures light as it hits the sensor. These types of detectors are best at sensing smoky fires. An ionization detector detects when smoke enters the ionization chamber and the ionized smoke particles get neutralized. The drop in the electrical current will activate the alarm. Ionization detectors are more responsive to flaming fires. A dual-sensor smoke alarm is a combination of both.

What to do if you hear a smoke alarm?

Smoke detector false alerts happen. If you hear a smoke alarm, check for the source of the smoke before calling 911. A small grease fire in a pan, for example, can be easily extinguished. However, if there is heavy smoke or a fire you can't control, evacuate the home right away and call 911.

What are the different types of fire alarms?

There are three types of smoke alarms: photoelectric, ionization and dual smoke detectors.

What to do if your smoke alarm is chirping?

If your smoke alarm is chirping, it may be time to switch the batteries.

How to test smoke detector?

Test the smoke detector by pressing the "Test" button. It should make a loud sound that can be easily heard in the general vicinity.

What type of alarm works best for very fast, fierce fires?

This type of alarm works best for very fast, fierce fires. Photoelectric smoke alarms operate using a light source and a photoelectric sensor. When smoke enters the optical chamber and interrupts the path of the light, the light is scattered about by the smoke particles and causes a sensor to activate the alarm.

How far away should smoke alarms be from cooking appliances?

Smoke alarms should be installed at least 10 feet (3 meters) from a cooking appliance to minimize false alarms when cooking.

How many different types of smoke alarms are there?

Although they are often lumped together as " smoke alarms ," there are actually three different types of smoke and fire alarms used in homes. Some actually detect heat and actual fire, some detect smoke, and some do both jobs.

What is a heat detector?

They feature a detecting component inside the unit that activates an alarm when it reaches a predetermined temperature. Heat detectors are sufficient for places where speed of detection isn't critical, or in small, confined spaces.

How far below the ceiling should you place smoke detectors?

By positioning the detectors at roughly 12 inches below the ceiling, you can ensure that it will detect smoke at the earliest opportunity. It is important that every floor of your home have at least one smoke detector. Garages are a very common source of fires, so make sure yours is equipped with a smoke detector.

How many people die from fires in a year?

On average, there are 2,620 deaths from residential home fires each year, and about one in every 320 households will report a fire within a five year period, according to the National Fire Protection Association. 1  About 60 percent of those deaths are in homes with malfunctioning smoke/fire alarms or no alarms at all, so the lesson is clear: 2  Understanding the mechanics of smoke alarms, and using and maintaining them correctly, can prevent an enormous family tragedy from occurring.

Where should smoke detectors be placed?

Many experts point out that smoke alarms should be placed on the ceiling, or high up on the walls. 4 By positioning the detectors at roughly 12 inches below the ceiling, you can ensure that it will detect smoke at the earliest opportunity.

Report

The Research Foundation initiated this project to review available literature and standards and perform a gap analysis related to the impact of ceiling height and detector spacing on smoke detection performance to inform the NFPA 72 Technical Committee.

Smoke Detector Spacing for High Ceiling Spaces

The Research Foundation initiated this project to review available literature and standards and perform a gap analysis related to the impact of ceiling height and detector spacing on smoke detection performance to inform the NFPA 72 Technical Committee.

How many fires did smoke alarms sound in?

When smoke alarms were not on all floors, they sounded in only 4% of the fires and alerted occupants in only 2%.

What keeps smoke alarms from working?

Paint, stickers, or other decorations could keep the alarms from working. For the best protection, interconnect all smoke alarms . When one smoke alarm sounds they all sound. Interconnection can be done using hard-wiring or wireless technology.

What to do if your alarm chirps and the battery is low?

If that alarm chirps, warning the battery is low, replace the battery right away. When replacing a battery, follow manufacturer’s list of batteries on the back of the alarm or manufacturer’s instructions. Manufacturer’s instructions are specific to the batteries (brand and model) that must be used.

Why is it important to have smoke alarms in your home?

Installing your smoke alarms correctly - and making sure they are in working order - is an important step to making your home and family safer from fire. It’s important to have enough smoke alarms in your home. Fire research has demonstrated that with today’s modern furnishings, fires can spread much more rapidly than in ...

How long do smoke alarm batteries last?

Smoke alarms with non-replaceable 10-year batteries are designed to remain effective for up to 10 years.

How far away should smoke alarms be from cooking appliances?

Smoke alarms should be installed at least 10 feet (3 meters) from a cooking appliance to minimize false alarms when cooking.

What is a smoke alarm installation program?

A smoke alarm installation program in your community can make a measurable difference in reducing deaths and injuries from fire. The updated “Planning and Implementing a Successful Smoke Alarm Installation Program” (PDF) is a comprehensive guide including everything you’ll need to get started, from tips on how to select volunteers, to pointers on soliciting donations and publicizing your program.

How far away should a smoke alarm be from the peak?

If it is a smoke alarm, I believe they need to be no more 3' away from the peak and no less than 4" from peak. It's in NFPA 72 somewhere.

How to build a detector on a sloped ceiling?

Draw a line across the gable end 4" down from the ceiling. Draw another line 36" down from the ceiling. Extend the lines around the sloped ceiling. Place detector (s) between these lines, arranged so the projection of the detector to the floor follows the flat ceiling spacing. This is the first line of detectors closest to the peak.

Is a smoke detector NFPA 72?

Not an expert on NFPA 72 but I believe a smoke detector is something tied into a fire alarm system where the typical smoke alarm like we often see in dwellings is a different animal to that code and may have some similar requirements but not necessarily the same requirements on use or placement.

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