One smoke alarm would be required in the hallway or corridor serving these bedrooms.Be aware of additional requirements governing additional smoke alarm installation when a hallway or corridor enters another room.An example could be a den or living room where there is a change in ceiling elevation from that of the hallway or corridor.In this case, R313.3 states that the area outside the hallway in the living room could require an additional smoke alarm.(Chapter 2 Definitions, 2012 ” The category code (UTGT) indicates that these are for indoor locations.
Other information can be found by reviewing these and other smoke alarm and fire or smoke detection categories found within the UL White Book.
News reports often show a serious injury or death due to fire.
Sometimes a functioning smoke alarm saved the life of a family; other times, deaths occurred because of their absence.
These alarms are intended for flush-mount applications only and are not intended for use on surface-mounted boxes.
All smoke alarms shall be listed and labeled in accordance with UL 217, is defined in the Building and Fire codes as: “Equipment, materials, products or services included in a list published by an organization acceptable to the building official and concerned with evaluation of products or services that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services and whose listing states either that the equipment, material, product or service meets identified standards or has been tested and found suitable for a specific purpose.” There is also a requirement that the smoke alarms be installed in accordance with NFPA 72, .
These signaling contacts may be internal to the individual device or may be part of a separate device and connected as an extended component.