AR Fire Sprinkler flashcards
AR Fire Sprinkler · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- NFPA 13 Scope
- NFPA 13 sets minimum requirements for the design and installation of automatic fire sprinkler systems in commercial, industrial, and other occupancies, excluding one- and two-family dwellings covered by NFPA 13D.
- Light Hazard Density
- Light hazard occupancies are designed at 0.10 gpm/ft² over a 1,500 ft² design area, reflecting low combustible loading such as offices, churches, and schools.
- Ordinary Hazard Group 2
- Ordinary Hazard Group 2 occupancies use a design density of 0.20 gpm/ft² over 1,500 ft² and include areas with moderate to high combustible loading such as mercantile and manufacturing spaces.
- Maximum Sprinkler Spacing
- For light hazard, sprinklers may be spaced up to 15 ft apart with a maximum protection area of 225 ft² per sprinkler, subject to ceiling and obstruction rules.
- Hydrostatic Test Pressure
- Sprinkler piping must be hydrostatically tested at 200 psi for two hours, or at 50 psi above working pressure when working pressure exceeds 150 psi.
- Hazen-Williams Formula
- The Hazen-Williams equation relates friction loss to flow, pipe diameter, and a roughness coefficient C; steel pipe uses C=120 for wet and C=100 for dry systems.
- Arkansas Licensing Board
- The Arkansas Fire Protection Licensing Board regulates sprinkler contractors and installers under Arkansas Code Title 20, Chapter 22, issuing licenses and enforcing standards.
- Responsible Managing Employee
- A licensed fire sprinkler contractor firm must employ at least one licensed responsible managing employee who oversees installations and qualifies the firm's license.
- Unlicensed Practice Penalty
- Contracting for or performing sprinkler installation without a valid Arkansas license exposes the person or firm to civil penalties and possible criminal sanctions under state law.
- License Renewal Requirements
- Arkansas sprinkler licenses must be renewed on the Board's cycle, with required fees and any continuing education, to maintain active authorization to perform sprinkler work.
- Insurance for Licensure
- Applicants and licensees must show proof of general liability insurance and other coverage as a condition of licensure and renewal with the Arkansas Board.
- Plan Submission to AHJ
- Sprinkler plans and specifications are submitted to the local authority having jurisdiction for review and approval before installation, with licensed contractor identification.
- Dry Pipe Valve Function
- A dry pipe valve holds back water with air pressure on the system side and opens when a sprinkler operates and releases air, admitting water to the piping.
- Dry Pipe Water Delivery
- Dry pipe systems must deliver water to the farthest sprinkler within 60 seconds of operation, achieved through proper valve sizing or a quick-opening device.
- Sprinkler Temperature Rating
- A sprinkler's temperature rating must be at least 20°F above the maximum expected ceiling temperature to prevent premature operation from ambient heat.
- Indicating Control Valve
- An indicating valve such as an OS&Y gate valve shows open or closed position and must be provided at the riser and water supply connections for control.
- Fire Pump Sizing
- A fire pump must be selected so its curve meets or exceeds the system demand at the design point, and a bypass is required around the pump.
- Backflow Preventer
- A backflow preventer is required at the connection between a sprinkler system and a potable water supply, and its friction loss must be included in calculations.
- Hose Stream Allowance
- Hose stream allowance is the water flow added to sprinkler demand to account for hose stations or fire department use, and it must be included in supply calculations.
- NFPA 25 Purpose
- NFPA 25 establishes minimum inspection, testing, and maintenance requirements for water-based fire protection systems after installation to keep them reliable.
- Main Drain Test
- The main drain test compares static and residual gauge pressures to detect supply degradation or a partially closed valve, and results are compared to a baseline.
- Gauge Inspection Frequency
- Gauges on wet pipe systems must be inspected monthly to confirm normal supply and system pressures and to detect fluctuations indicating problems.
- Dry Pipe Valve Trip Test
- Dry pipe and preaction valves require annual trip testing, and dry pipe air pressure and priming water levels are checked monthly.
- Sprinkler Head Replacement
- Sprinkler heads that have operated, are painted or corroded, or exceed age limits must be replaced; certain older heads require sample testing or replacement.
- Impairment Procedure
- When a system is impaired, the AHJ and owner must be notified, a fire watch may be required, and the impairment must be documented until restored.
- Waterflow Alarm Test
- Waterflow alarm devices are tested quarterly by opening a test valve to confirm the alarm activates and transmits within the required time.
- Written Contract Elements
- A sprinkler contract should define scope, codes, schedule, payment terms, change order procedures, and responsibility for permits and inspections.
- Change Order Documentation
- Change orders must be written and approved before extra work proceeds so the contractor preserves the right to payment for added scope.
- Hot Work Permit
- Hot work such as cutting or welding requires a permit, removal of combustibles, and a fire watch to prevent ignition during sprinkler installation.
- Mechanics Lien Deadlines
- Arkansas mechanics' lien rights require timely notice and filing within statutory deadlines, so contractors must track dates to preserve payment claims.
- Bid Takeoff Components
- A sprinkler bid estimate includes material takeoff, labor hours, equipment, permits, overhead, profit, and a contingency for unforeseen site conditions.
- OSHA Fall Protection
- Work at heights during sprinkler installation requires fall protection such as guardrails, harnesses, or nets under OSHA construction standards.