In sidewall sprinkler design, the Maximum Allowable Distance describes the distance from the sidewall to which element?

In sidewall sprinkler design, the Maximum Allowable Distance describes the distance from the sidewall to which element?

• A. From sidewall to obstruction
• B. From ceiling to sprinkler
• C. From sidewall to sprinkler
• D. From sprinkler to obstruction

Answer: (C)

When you design a sprinkler layout with sidewall heads, the idea behind the maximum allowable distance is to set how far the sprinkler can be from the wall and still provide the required coverage in front of it. This distance is measured along the wall, from the sidewall itself to the center of the sprinkler head. Keeping the sprinkler within this limit ensures the spray pattern reaches the protected area effectively and creates a proper coverage curtain between the wall and the open space. If the head is placed farther from the wall than this maximum distance, the spray pattern may not reach far enough into the space, leaving an unprotected zone near the wall. The other options describe distances that aren’t used to define sidewall coverage geometry (such as wall-to-obstruction, ceiling-to-sprinkler, or sprinkler-to-obstruction), so they don’t describe the controlling design limit for sidewall placement.

When you design a sprinkler layout with sidewall heads, the idea behind the maximum allowable distance is to set how far the sprinkler can be from the wall and still provide the required coverage in front of it. This distance is measured along the wall, from the sidewall itself to the center of the sprinkler head. Keeping the sprinkler within this limit ensures the spray pattern reaches the protected area effectively and creates a proper coverage curtain between the wall and the open space.

If the head is placed farther from the wall than this maximum distance, the spray pattern may not reach far enough into the space, leaving an unprotected zone near the wall. The other options describe distances that aren’t used to define sidewall coverage geometry (such as wall-to-obstruction, ceiling-to-sprinkler, or sprinkler-to-obstruction), so they don’t describe the controlling design limit for sidewall placement.