In an in-rack system, is it permissible for heads to be less than 6 feet apart?

In the context of an in-rack sprinkler system, it is essential to understand the design requirements specified by codes and standards such as NFPA 13. In typical installations, the minimum distance between sprinkler heads is designed to ensure adequate coverage and prevent overspray or under-spray in the protected area. However, there are specific scenarios and design configurations in which it is permissible for sprinkler heads to be installed less than 6 feet apart.

The correct response acknowledges that in certain cases, such as in high-piled storage and specific industry needs, sprinklers may be placed closer together without compromising the effectiveness of the fire suppression system. This could involve specialized arrangements or specific sprinkler types designed for reduced spacing.

The flexibility in placement recognizes the complexity of various storage methods and allows for effective fire protection while adhering to safety standards. Consequently, while the standard guideline is to maintain a minimum distance, exceptions exist that can be justified based on the specific requirements of the installation and the type of materials stored.

This nuanced understanding of sprinkler placement aligns with industry practices as well as protection strategies tailored for particular environments, which could lead to approval through appropriate channels, such as the authority having jurisdiction (AHJ), under certain circumstances.