Why should there be a clearance of 18 inches around sprinkler heads?

Maintaining an 18-inch clearance around sprinkler heads is crucial to ensure they can function effectively in the event of a fire. This clearance allows unobstructed water flow during activation, enabling the sprinkler system to distribute water evenly and promptly over a wide area. When items are placed too close to sprinkler heads, there is a risk that obstructions could impede the dispersal of water or even prevent the sprinkler from activating correctly. This requirement is part of fire safety regulations and building codes designed to protect lives and property by ensuring that fire suppression systems can operate as intended without interference.