This standard provides the code of practice for the design, installation, and maintenance of automatic fire sprinkler systems. It outlines requirements for hazard classification, system components, hydraulic calculations, water supplies, and acceptance testing to ensure the effective operation of sprinkler systems for life safety and property protection.
Lays down requirements for the planning, design, installation, acceptance testing, operation, and maintenance of automatic sprinkler systems.
Quick Reference Values
Maximum coverage per sprinkler (Light Hazard)21 m²
Maximum coverage per sprinkler (Ordinary Hazard)12 m²
Maximum distance between sprinklers (Light Hazard)4.6 m
Minimum design density (OH-1)5.0 mm/min
Minimum duration of water supply (OH-2)60 min
Minimum distance of deflector below ceiling (Standard Spray)25 mm
Maximum distance of deflector below ceiling (Unobstructed Construction)300 mm
Practical Notes
Correctly identifying the Occupancy Hazard Class (Light, Ordinary, or High) as per Annex A is the most critical first step as it governs all design parameters.
The choice between a pre-calculated pipe schedule design (for simple LH/OH systems) and a full hydraulic calculation must be made early. Hydraulic calculations are more common and offer greater design flexibility.
Pay close attention to obstruction rules (Clause 9.4). Any obstruction, like beams or light fixtures, within 500 mm vertically below a sprinkler deflector can severely impair its spray pattern and effectiveness.