LA Fire Sprinkler flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Hazen-Williams formula

Hydraulic equation p = 4.52 Q^1.85 / (C^1.85 d^4.87) used to calculate friction loss in sprinkler piping, where Q is flow in gpm and d is internal pipe diameter in inches.

Design density

The minimum water flow rate in gallons per minute applied over each square foot of the design area, selected based on the occupancy hazard classification of the protected space.

Remote area

The hydraulically most demanding area of sprinkler coverage used for calculation, sized according to hazard classification and adjusted for quick-response sprinkler allowances and ceiling height.

Hydraulic calculation node

A point in the piping network where flow, pressure, and elevation are tracked during calculation, allowing the designer to verify each pipe segment and fitting loss.

K-factor

A sprinkler discharge coefficient relating flow to pressure by Q = K√P, where flow is in gpm and pressure in psi; it identifies the sprinkler's orifice discharge characteristics.

Working plan scale

Drawings submitted for review must be drawn to a stated scale sufficient to show pipe sizes, sprinkler locations, and dimensions clearly for the reviewer's evaluation.

Deflector distance pendent

Standard spray pendent and upright sprinklers must be positioned with the deflector 1 inch to 12 inches below the ceiling to allow proper spray development.

Hydrostatic test pressure

NFPA 13 requires piping to be tested at 200 psi for two hours, or at 50 psi above the maximum static pressure when that exceeds 150 psi.

Underground flushing velocity

Underground mains must be flushed before testing at a flow rate producing a velocity of at least 10 feet per second to clear debris from the piping.

Main drain test

A test that opens the main drain and compares static and residual pressure readings to verify the water supply is unobstructed and valves are fully open.

Forward flow test

A test of a backflow prevention assembly that confirms it passes the system design flow rate while pressure loss remains within the allowable limit.

Spare sprinkler cabinet

A cabinet stocked with spare sprinklers of each type and temperature rating installed, plus a wrench, required to be maintained on the premises.

Material and test certificate

A contractor-completed form documenting flushing, hydrostatic testing, and flow test results, submitted to the authority having jurisdiction as part of final acceptance.

Waterflow switch test

An inspection step confirming the alarm-initiating device operates at the correct flow and transmits a signal to the fire alarm panel within the required time.

Obstruction rule 18 inches

Sprinklers must be located so structural members or other obstructions within 18 inches horizontally do not block spray patterns, unless additional sprinklers or shielding are provided.

Riser inspection

A field check verifying the alarm valve, gauges, main drain, test-and-drain connection, and waterflow switch are installed, labeled, and accessible per plans.

Louisiana sprinkler contractor license

A credential issued by the State Fire Marshal authorizing a business entity to install, alter, or repair automatic fire sprinkler systems within Louisiana.

Responsible managing employee

The individual holding the required competency credential who oversees the licensed contractor's sprinkler work and whose departure must be reported to the licensing authority.

License renewal cycle

Licensed sprinkler contractors must renew on the schedule set by the licensing authority; a lapsed license can require reapplication and halt permitted work.

Insurance certificate requirement

Contractors must maintain general liability and workers' compensation coverage and submit current certificates to the licensing authority as a condition of licensure.

License number on submittals

Plan submittals, permits, and contracts must display the contractor's license number; using another firm's license is prohibited.

Subcontracting restrictions

A licensed contractor may not allow unlicensed parties to perform sprinkler work under its license; subcontractors must hold their own required credentials.

Municipal registration

Some Louisiana jurisdictions require a separate local registration or permit in addition to the state license before work may begin within that jurisdiction.

Continuing education requirement

Renewal may require documented code-update or continuing education training; records should be retained to demonstrate compliance during audit.

State Uniform Construction Code

Louisiana's statewide construction code adopting the International Building Code and International Fire Code with amendments, administered by the State Fire Marshal.

NFPA 13R scope

A sprinkler standard for residential occupancies up to and including four stories in height, offering reduced requirements compared with full NFPA 13 systems.

NFPA 13D scope

A sprinkler standard for one- and two-family dwellings and manufactured homes, designed for life safety rather than property protection.

More restrictive governs

When the adopted code and a referenced standard conflict, the stricter requirement generally applies unless the code provides a specific alternative.

State Fire Marshal bulletin

A formal interpretation or technical directive issued by the State Fire Marshal clarifying how adopted fire sprinkler requirements apply in Louisiana.

IBC sprinkler threshold

The building code requires sprinklers based on occupancy group, construction type, fire area size, and building height, with thresholds differing from the fire code.

Change of occupancy trigger

An alteration or change of occupancy in an existing building may require sprinkler upgrades under the existing building code provisions.

Code appeal process

Disputes over code interpretations are typically appealed to the local board of appeals or the State Fire Marshal, depending on the jurisdiction.