Tyco Upright sprinkler TY313 (Series TY-FRB) 5.6K automatic sprinklers of the “quick response” 3 mm frangible bulb type. They are “standard spray” sprinklers intended for use in fire sprinkler systems designed in accordance with the standard installation rules recognized by the applicable Listing or Approval agency. TY313 produce a hemispherical water distribution pat- tern below the deflector.