Fire protection sprinkler system for metal buildings

A fire protection sprinkler system for metal buildings comprising:

• a plurality of parallel rafters supporting a roof of a metal building and spaced to form a plurality of bays up to about 28 feet wide;
• at least one water line extending along and supported by each of the rafters;
• and
• a plurality of sprinkler heads adjacent to and supported by the rafters and connected to receive water from the supply lines and having deflectors arranged to distribute water over the area of the bays between the rafters, wherein each sprinkler includes a deflector having a vertical part facing the sprinkler orifice and a hood part having a generally horizontal roof portion and downwardly inclined wall portions on opposite sides of the roof portion and at the forward end of the roof portion located on the opposite side of the vertical part with respect to the sprinkler orifice, and wherein the vertical part has an opening above the axis of the sprinkler and includes a central projection extending upwardly into the opening.

A fire protection sprinkler system for metal buildings comprising:

• a plurality of parallel rafters supporting a roof of a metal building and spaced to form a plurality of bays up to about 28 feet wide;
• at least one water line extending along and supported by each of the rafters;
• and
• a plurality of sprinkler heads adjacent to and supported by the rafters and connected to receive water from the supply lines and having deflectors arranged to distribute water over a majority of the area of the bays between the rafters.

A fire protection sprinkler system for metal buildings comprising:

• a plurality of parallel rafters supporting a roof of a metal building and spaced to form a plurality of bays up to about 28 feet wide;
• at least one water line extending along and supported by each of the rafters;
• and
• a plurality of sprinkler heads adjacent to and supported by the rafters and connected to receive water from the supply lines and having deflectors arranged to distribute water over a majority of the area of the bays between the rafters, wherein each sprinkler includes a deflector having a vertical part facing the sprinkler orifice and a hood part having a generally horizontal roof portion and downwardly inclined wall portions on opposite sides of the roof portion and at the forward end of the roof portion located on the opposite side of the vertical part with respect to the sprinkler orifice, and wherein the vertical part has an opening above the axis of the sprinkler and includes a central projection extending upwardly into the opening.