What sprinkler head spacing rule applies to discrepancies in vertical ceiling heights?

Sprinkler head spacing rules are crucial for ensuring effective fire protection, especially in areas where there are discrepancies in vertical ceiling heights, such as those created by soffits. When dealing with these discrepancies, the correct guideline is to space the sprinkler heads equally from both sides of the soffit. This ensures an even distribution of water coverage, which is vital for effective fire suppression.

By spacing the heads equally from both sides, you account for variations in ceiling height, ensuring that all areas receive adequate coverage and that the sprinkler system functions efficiently during a fire event. Furthermore, this arrangement minimizes the risk of dead zones where the sprinklers might not provide sufficient water coverage.

The other options do not adequately address the need for uniform coverage in relation to ceilings and can result in uneven distribution, which could compromise the sprinkler system's effectiveness.