Which spacing configurations are listed as options for sprinkler spacing patterns?

• A. Rectangular
• B. Triangular
• C. Single Row
• D. All of the above

Answer: (D)

Spacing patterns describe how sprinkler heads are arranged to achieve uniform coverage. Rectangular spacing uses a grid with equal spacing along two directions, which fits many rectangular or square zones. Triangular spacing places heads at the corners of equilateral triangles, a staggered layout that can improve uniformity when throw radii and overlaps vary. Single row spacing runs a line of heads along a long, narrow area, optimizing coverage in that direction. Because each of these configurations is a valid option for organizing sprinklers, all of the above is the best choice.