Name a critical factor in determining the spacing of sprinkler heads.

Spacing of sprinkler heads is significantly influenced by ceiling height and obstructions. When designing a sprinkler system, it's crucial to consider how far sprinkler heads can effectively cover an area based on the height of the ceiling. Higher ceilings may require sprinklers to be spaced closer together to ensure adequate water distribution, as the water will take longer to fall and may not reach the ground effectively from a greater height.

Obstructions such as beams, ductwork, and lighting fixtures can interfere with the spray pattern of the water discharged from sprinklers. If a sprinkler head is obstructed, its effectiveness in suppressing a fire is greatly reduced, which may necessitate adjustments in their placement or additional heads to ensure coverage.

Therefore, understanding the interplay between ceiling height and potential obstructions is essential for achieving optimal fire protection in any given space. This attention to detail ensures that the designed sprinkler system meets safety standards and functions effectively in the event of a fire.