Standard for Installation of Fire Safety Devices based on Use and Occupancy Article 40

The following requirements shall be observed in the construction of outdoor hydrants:1.Hydrant diameter shall measure at least 63 mm and location of it shall be within a 40-meter radius of the outer walls of the building ground floor.2.Nozzle discharge pressure shall be at least 2.5 kg/cm2 or 0.25 MPa, and discharge flow rate shall be at least 350 L/min.3.The outdoor hydrant switch shall not exceed the maximum height of 1.5 meters above ground and be above the minimum height of 0.6 meter above ground. Where the hydrant is installed underground, the fire hose joint position shall be at least 0.3 meter above ground.4.A fire hose house shall be located within a 5-meter radius of the hydrant and meet the following requirements:(1)The fire hose house shall be deep enough to contain fire hoses and nozzle. Drainage holes shall be installed on both sides of the house base. Moreover, the cover of the fire hose house shall have an area of at least 0.8 m2.(2)The house cover shall be indelibly marked with “Fire hose” in visible text. Each word shall measure at least 20cm2.(3)The fire hose house shall contain at least two pieces of fire hoses having a length of at least 20 meters and a diameter of 63 mm, one dual-purpose beeline spray nozzle with a diameter of at least 19 mm, and a valve-type hydrant switch.5.The space within a 3-meter radius of the outdoor hydrant shall always be kept vacant and free from piled objects, trees, or shrubbery. Visible signs saying “Hydrant” shall be installed near the hydrant location.