What does 'overhead clearance' refer to in sprinkler design?

Overhead clearance in sprinkler design primarily refers to the space between potential heat sources and the sprinkler head. This is crucial because effective operation of the sprinkler system relies on it being able to detect heat from a fire. If there are obstacles or significant heat sources located too close to the sprinkler head, it can interfere with the ability of the sprinkler to function properly during a fire event.

Ensuring adequate overhead clearance allows the sprinkler's response to fire conditions to be timely and reliable, maximizing safety and effectiveness. Maintaining this distance is important in the design and layout of sprinkler systems, as it helps prevent premature activation or ineffective coverage during fire occurrences.