NFPA 13 Standard for Installation of Sprinkler Systems brings you the facts about sprinkler protection in any occupancy: Extracts of sprinkler system requirements from more than 30 NFPA codes and standards, Special Occupancy Requirements, Current concealed space provisions include up-to-date rules for sloped combustible concealed spaces,Added installation criteria meet the needs of special construction features including ceiling pockets, skylights, and stepped ceilings and and some other related topics