What is the maximum allowable spacing between sprinkler heads in a standard occupancy?

In standard occupancy conditions, the maximum allowable spacing between sprinkler heads is indeed 20 feet. This guideline is established to ensure that water from the sprinklers can effectively cover the intended area and suppress a fire. Proper spacing maximizes the efficiency of the sprinkler system, allowing for adequate water distribution while minimizing the chance of fire spreading between the areas, which may be inadequately protected.

When identifying the right spacing, it is important to consider factors such as the type of sprinkler head, the configuration of the occupancy, and the specific fire hazards present. The 20-foot spacing allows for the best balance of coverage and system performance, ensuring that in the event of a fire, the sprinklers will activate in a timely manner and deliver the needed water over a sufficient area.

Other options like 12, 15, and 24 feet do not conform to the standard requirements as effectively as 20 feet does. Spacing that is too tight may lead to unnecessary water usage, while spacing that is too wide may leave unprotected areas where fire could spread without being suppressed by the sprinkler system.