Extended Coverage Sprinklers are intended for the protection of areas larger than those specified in standard installation rules and for specific light, ordinary, or extra hazard occupancies. Sprinklers are designed to protect ordinary hazard occupancies with a maximum coverage area.the standard distribution of sprinkler heads will not provide enough coverage. In these cases, extended coverage sprinkler heads can be installed to increase the spacing between heads. Extended coverage sprinklers have a water distribution radius of a little over 10 feet, so they can be spaced approximately 20 feet apart.
Criteria for the location of sprinkler heads. First, sprinklers must be located so they are within the hot-gas layer that develops near the ceiling during a fire because activation occurs when the sprinkler head reaches a certain temperature. Second, they must be located so that the water that is discharged from the sprinkler is not disrupted or affected by construction elements such as beams, trusses, or soffits.The extralarge orifice produces the flows required to meet Light and Ordinary Hazard density requirements at lower pressures than standard orifice or large orifice sprinklers.The glass bulb operating element and special deflector characteristics meet the challenges of quick response extended coverage standards.During fire conditions, the heat-sensitive liquid in the glass bulb expands, causing the glass to shatter, releasing the pip cap and sealing spring assembly. Water flowing through the sprinkler orifice strikes the sprinkler deflector, forming a uniform spray pattern.
Two Main Criteria For Location Of Sprinkler Heads
- Because fire sprinklers are heat activated, sprinkler heads must be located high up on or near the ceiling.
- Sprinkler heads must be unobstructed to provide maximum flow to the areas that need it. This means they cannot be blocked by beams, trusses, soffits, or any other elements of your building’s construction.
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