1.3 lays out the “Three Times Rule” which states that unless specific requirements are met that “sprinklers shall be positioned away from obstructions a minimum distance of three times the maximum dimensions of the obstruction”, up to a maximum of 24 inches (0.6096 m) though the “maximum clear distance does not apply ...
For sidewall sprinklers, the rule applies if the obstruction is within 18 inches below the sprinkler deflector. It says that the maximum distance from the sprinkler deflector to the obstruction is the smaller of four times the largest dimension of the obstruction or 36 inches.
Nothing should be in that area between the bottom of the sprinkler heads and the imaginary horizontal plane parallel to the ceiling that is 18 inches below. This is done to allow an even and unobstructed spray pattern from the sprinklers when triggered to extinguish the fire.
According to #NFPA_13, For pipe schedule method systems in light & ordinary hazards, Branch lines shall not exceed eight sprinklers on either side of a cross main.
You can operate 2 or 3 sprinklers at one time with 'Y's and extra hoses, depending on your water pressure. To run more than one sprinkler off the same faucet, attach a 'Y' to your faucet and run a hose to each sprinkler.
At different pressures, the sprinkler head and nozzle will consume different amounts of water. For example, at 35 pounds per square inch (PSI) the 5000 Series Rotor using the 3.0 nozzle will use 3.11 gallons per minute (GPM). If your home's water capacity was 10 GPM, you could place 3 heads per zone.
LL26 was designed to improve the fire safety of NYC buildings. This law requires buildings classified as business occupancies that are at least 100 feet tall to have automatic fire sprinkler systems.
Maximum Number of Sprinklers on Branch Line According to NFPA13. Where more than eight sprinklers on a branch line are necessary, lines shall be permitted to be increased to nine sprinklers by making the two end lengths 1 in. and 11∕4 in. , respectively, and the sizes thereafter standard.
Sprinkler heads must be a maximum of 12-15 feet apart, depending on the hazard rating of the space (it ranges from Light Hazard to Extra Hazard 1&2), and at least half that distance from the nearest walls (typically 7.5 feet away).
The sprinkler pipe size from the water supply source to a sprinkler shall be not less than 3/4 of an inch (20 mm) in diameter. Threaded adapter fittings at the point where sprinklers are attached to the piping shall be not less than 1/2 of an inch (15 mm) in diameter.
My recommendation is to bury sprinkler lines 8-12 inches. I usually try to keep a standard depth of 10" because it provides more safety if I need to do some type of ground work so I don't have to worry about hitting lines. A walk-behind rototiller generally won't go deeper than 8".
Running multiple zones at once is usually not possible due water-pressure and flow limitations at residential properties. As with any standard irrigation controller, you can wire multiple solenoids/valves to the same zone output if you want.
Aerate to increase infiltration. 6. Water in the early morning (4am to 10am). This allows the grass blades to dry, making them less susceptible to foliar diseases.
1. Water Thoroughly: Rotor zones should run for about 30-40 minutes per zone and spray zones 10-15 minutes per zone. 2.
5.2. 1 of NFPA 13, which states that the distance from the sprinkler to the wall can be no more than one-half the allowable distance between sprinklers. The max distance between standard spray sprinklers in light hazard settings is 15 ft. (4.6 m) (with exceptions for light-hazard, combustible concealed spaces).
The industry benchmark for design and installation of automatic fire sprinkler systems, NFPA 13 addresses sprinkler system design approaches, system installation, and component options to prevent fire deaths and property loss.
NFPA® 13, Standard for the Installation of Sprinkler Systems, provides the minimum requirements for the design and installation of automatic fire sprinkler systems and exposure protection sprinkler systems.
Local Law 33 requires owners of buildings over 25,000 square feet to obtain Building Energy Efficiency Rating labels on an annual basis to display near public-facing entrances. These labels include a 1-100 ENERGY STAR® score and a corresponding A-D letter grade.
The NYC Facade Inspection Safety Program (FISP), also known as Local Law 11, requires NYC buildings taller than six stories to have their facades inspected and repaired every five years.
In areas where sprinkler systems aren't ideal for extinguishing a blaze, OSHA requires automatic fire suppression systems. Follow these regulations: Install systems that use extinguishing agents approved to fight the specific fire hazard in the immediate vicinity. Inspect fire suppression systems regularly.
Most spray and rotator heads are designed to work their best at about 30 psi. When pressure is lower, the watering radius will be reduced, so you may need to place your heads closer together to get the coverage you need. Higher pressures – those above about 40 psi – will cause the head to mist or fog.
For spray heads, it is 30 psi, with an operating range of 15 to 30 psi. For drip lines, this is about 20 psi, with an operating range of 15 to 30 psi. Remember, flow rate and pressure are directly related to one another. If pressure is not well-controlled, irrigation efficiency will suffer.
The most common reason that sprinklers failed to operate was the system being shut off at some point before the fire. One sprinkler is usually enough to control a fire. In 77 percent of the structure fires where sprinklers operated, only one operated. In 97 percent, five or fewer operated.