When sizing a non-square room for strobe rating, which dimension is used to determine the room size on the table?

When sizing a non-square room for strobe rating, which dimension is used to determine the room size on the table?

• A. Shorter dimension
• B. Largest dimension
• C. Average dimension
• D. Perimeter

Answer: (B)

When sizing a non-square room for strobe rating, you use the largest dimension because the table is based on the longest possible straight-line distance within the room. The goal is to ensure the strobe is clearly visible to occupants at the farthest point, which lies along the longer side of a rectangle. If you used the shorter dimension, you’d be underestimating the space and could end up with insufficient visibility. The average or perimeter doesn’t reflect that worst-case distance, so they’re not the basis for the sizing. So, the largest dimension is the right choice.

When sizing a non-square room for strobe rating, you use the largest dimension because the table is based on the longest possible straight-line distance within the room. The goal is to ensure the strobe is clearly visible to occupants at the farthest point, which lies along the longer side of a rectangle. If you used the shorter dimension, you’d be underestimating the space and could end up with insufficient visibility. The average or perimeter doesn’t reflect that worst-case distance, so they’re not the basis for the sizing. So, the largest dimension is the right choice.