In the heat detector spacing example, what ceiling height is used?

In the heat detector spacing example, what ceiling height is used?

• A. 18'1"
• B. 12'0"
• C. 20'0"
• D. 15'0"

Answer: (A)

In heat detector spacing, how high the ceiling is matters because detector coverage depends on where heat will accumulate near the ceiling. The example uses a very tall open ceiling to show the spacing calculation, and the height chosen for that scenario is 18 feet 1 inch. That specific height drives the spacing values shown in the problem, reflecting how higher ceilings require different detector spacing to maintain proper coverage. If the ceiling were lower, the spacing would be tighter; if it were higher, spacing would be larger. The other common ceiling heights (12 feet, 15 feet, 20 feet) aren’t used in this particular example, so they wouldn’t match the problem’s setup and resulting spacing.

In heat detector spacing, how high the ceiling is matters because detector coverage depends on where heat will accumulate near the ceiling. The example uses a very tall open ceiling to show the spacing calculation, and the height chosen for that scenario is 18 feet 1 inch. That specific height drives the spacing values shown in the problem, reflecting how higher ceilings require different detector spacing to maintain proper coverage. If the ceiling were lower, the spacing would be tighter; if it were higher, spacing would be larger. The other common ceiling heights (12 feet, 15 feet, 20 feet) aren’t used in this particular example, so they wouldn’t match the problem’s setup and resulting spacing.