What is the beam rule?

What is the beam rule?

3.2.1 “The Beam Rule” In short the “beam rule” states that there must be at least 1 foot (0.3048 m)of separation between the sprinkler and the obstruction if the deflector is any distance above the bottom of the obstruction.

When old style sprinklers are installed in a fur storage vault their maximum spacing should be?

8.6. 3.4. 4 Old-style sprinklers protecting fur storage vaults shall be permitted to be placed less than 6 ft (1.8 m) on center.

What is the maximum area of coverage of a SSP on a hydraulically calculated system?

Hydraulically calculated systems with less density have the standard 15-foot (4.6-meter) maximum. High-Piled Storage (12-15 ft). Hydraulically calculated systems with a density at or over 0.25 gallons per minute per square foot have a 12-foot (3.7 meters) maximum.

How many sprinklers can be on a branch line?

Branch lines should not exceed eight sprinkler heads on either side of a cross main. Areas within fire walls may be subdivided into separate fire areas by one-hour partitions.

What is the clearance for sprinkler heads?

The minimum vertical clearance between sprinklers and material below shall be 18 inches (45.7cm).

How many stories are covered in the NFPA 13R Standard?

Scope. Both NFPA 13D and NFPA 13R have limited scopes. NFPA 13R limits installations to residential structures of four stories or less and no more than 60 feet in height, measured from the grade plane to the top of the building.

How far can sprinkler head be from ceiling?

12″
Distance from Ceiling: minimum 1″, maximum 12″ for unobstructed construction. The minimum 1″ is typical; however, concealed, recessed, and flush sprinklers may be mounted less than 1″ from the ceiling and shall be installed based on their listing.

How far does a sprinkler head have to be from a wall?

Four-inch minimum spacing from walls and maximums vary with room shape and size, which is why standard spray sprinklers have four-inch minimum spacing from walls and maximums. The minimum sprinkler distance from walls is four inches for all standard sprinkler heads. The distance from an end wall is 10.

How many gpm does a sprinkler use?

What is the average flow rate? The standard sprinkler flow rates, in general, are from 4 gallons per minute (gpm) from a 5/32-inch nozzle at 30 pounds pressures to over 11 gpm from a 7/32-inch nozzle at 70 pounds pressures.