A wall-mounted smoke alarm should not be mounted further than how many inches from the corner where the ceiling meets the wall?

The appropriate maximum distance for a wall-mounted smoke alarm to be placed from the corner where the ceiling meets the wall is 12 inches. This standard is put in place to ensure that the smoke alarm can effectively detect smoke and provide early warning in case of a fire. Smoke rises and collects at the ceiling; thus, positioning the alarm too far away from the corner could lead to delayed detection of smoke, potentially compromising safety.

Mounting the alarm within 12 inches of the ceiling's corner allows it to function optimally while reducing the chances of being obstructed by light fixtures, beams, or other architectural features that could interfere with smoke detection. The guidelines for smoke alarm placement help ensure that they are both accessible for maintenance and positioned effectively for smoke detection, thus maximizing their effectiveness in protecting lives and property.