What does the extended coverage of a sprinkler maximize in terms of spacing?

The extended coverage of a sprinkler system is designed to maximize the effective reach and coverage area of the sprinklers, which is crucial for ensuring that an adequate amount of water is distributed over the area needing protection. The spacing directly impacts the efficiency of the sprinkler system in controlling fire hazards.

In this case, a spacing of 20 foot by 20 foot represents a balance between adequate coverage and practical water distribution. This spacing allows the sprinkler heads to effectively overlap their coverage areas, ensuring that there are no gaps where a fire could potentially spread. This is especially beneficial in open areas or where the height of the ceilings is higher than average, as it ensures that even in those conditions, the water can properly reach the targeted space.

Choosing this specific option reflects an understanding that maximizing the coverage, while still maintaining the performance and reliability of the sprinkler system, is essential for effective fire protection. The other spacing options may exceed this effective coverage area or may not provide optimum coverage, leading to potential inadequacies in fire control.