MN Fire Sprinkler flashcards
MN 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 applies to commercial, industrial, and residential-occupancy sprinkler systems with 20 or more sprinklers, and to systems in buildings where the AHJ requires full NFPA 13 compliance.
- NFPA 13R scope
- NFPA 13R covers automatic sprinkler systems in residential occupancies up to and including four stories above grade, limited to certain building types and occupancies as defined in the standard.
- NFPA 13D scope
- NFPA 13D applies to automatic sprinkler systems in one- and two-family dwellings and manufactured homes, designed for life safety and property protection with limited water supply assumptions.
- Light hazard density
- Light hazard occupancies use design densities typically ranging from 0.10 gpm/ft² over 1,500 ft² to 0.07 gpm/ft² over 3,000 ft², depending on the density/area curve selected.
- Ordinary hazard group 1
- Ordinary hazard group 1 occupancies use densities from 0.15 gpm/ft² over 1,500 ft² to 0.10 gpm/ft² over 3,000 ft², with maximum sprinkler spacing of 15 feet and 130 ft² coverage.
- Extra hazard group 1
- Extra hazard group 1 occupancies require densities from 0.30 gpm/ft² over 2,500 ft² to 0.20 gpm/ft² over 3,500 ft², with maximum sprinkler spacing of 12 feet and 100 ft² coverage.
- Minimum sprinkler pressure
- The minimum residual pressure at the most remote sprinkler is 7 psi (0.5 bar) unless the listing of the sprinkler or a specific design method requires a higher value.
- Sprinkler temperature rating rule
- Sprinkler temperature rating must be at least 20°F above the maximum expected ceiling temperature; ordinary ratings are 135-170°F, intermediate 175-225°F, and high 250-300°F.
- Hanger spacing rule
- NFPA 13 generally permits hanger spacing up to 12 feet for pipe 1 inch and smaller, and up to 15 feet for larger pipe, with additional hangers at changes in direction.
- Hydraulic calculation requirement
- Hydraulic calculations must demonstrate that the system demand (flow and pressure at the most remote area) is met by the available water supply with an appropriate safety margin.
- Minn. Stat. 299M
- Minnesota Statutes chapter 299M governs fire sprinkler contractors and systems, establishing licensing, installation, and enforcement requirements enforced by the State Fire Marshal.
- Minn. R. ch. 7512
- Minnesota Rules chapter 7512 contains the administrative rules implementing fire sprinkler contractor licensing, plan review, installation, and inspection requirements under Minn. Stat. 299M.
- State Fire Marshal role
- The Minnesota State Fire Marshal issues fire sprinkler contractor licenses, reviews plans, conducts inspections, and enforces Minn. Stat. 299M and Minn. R. ch. 7512.
- Fire sprinkler contractor license
- A Minnesota fire sprinkler contractor license authorizes a business to design, install, alter, repair, and maintain fire sprinkler systems, subject to individual credential and insurance requirements.
- Fire sprinkler fitter credential
- Individual fire sprinkler fitters must hold a Minnesota registration or certification separate from the contractor license; the contractor license alone does not authorize an individual to perform work.
- Responsible managing employee
- A fire sprinkler contractor must designate a responsible managing employee holding the appropriate individual credential to qualify the contractor license and oversee code-compliant work.
- License enforcement
- Unlicensed fire sprinkler work can result in civil penalties, stop-work orders, and criminal referral under Minn. Stat. 299M, and may disqualify the contractor from future licensure.
- State code adoption
- Minnesota adopts NFPA 13, 13R, and 13D by reference with state amendments; local jurisdictions may adopt stricter amendments but cannot relax state minimum requirements.
- Plan submittal requirement
- New fire sprinkler systems and alterations require plan submittal to the State Fire Marshal or delegated local authority, including hydraulic calculations, shop drawings, and manufacturer cut sheets.
- Water supply flow test
- NFPA 13 requires a water supply flow test within the prior 12 months, recording static pressure, residual pressure, and flow, or a documented municipal supply curve.
- Plan review checklist
- Plan review verifies hazard classification, density/area selection, sprinkler spacing and coverage, pipe sizing, remote area location, and hydraulic margin between supply and demand.
- Permit issuance
- The AHJ issues a permit after plan approval; work may not begin until the permit is issued and posted on site, and inspections must be scheduled with the AHJ.
- Hydrostatic test
- Sprinkler piping must be hydrostatically tested at 200 psi for 2 hours, or 50 psi above working pressure if that is greater, with results documented before concealment.
- Rough-in inspection
- Overhead rough-in inspection occurs before ceilings are closed, verifying pipe routing, hanger spacing, bracing, and sprinkler locations match the approved plans.
- Final acceptance test
- Final acceptance includes main drain flow test, alarm and flow-switch functional testing, and verification that installed sprinklers match the approved temperature, K-factor, and response type.
- Record drawings
- As-built record drawings and contractor material and test certifications must be delivered to the owner and AHJ at project closeout to document code-compliant installation.
- License renewal requirements
- Minnesota fire sprinkler contractor license renewal requires current insurance and bond, proof of continuing education, and a designated responsible managing employee in good standing.
- Insurance and bond
- General liability insurance minimums and workers' compensation coverage are conditions of licensure; a lapse can result in license suspension or revocation by the State Fire Marshal.
- RME replacement rule
- If the responsible managing employee leaves, the contractor must designate a qualified replacement within the state-allowed timeframe to keep the license in good standing.
- Mechanic's lien notice
- Minnesota contract and lien law requires pre-lien notice and adherence to mechanic's lien deadlines for unpaid sprinkler work on construction projects.
- Unlicensed subcontracting
- Subcontracting fire sprinkler work to unlicensed entities is prohibited; the licensed contractor remains responsible for code compliance of all subcontracted work.
- Continuing education audit
- Continuing education hours must be in approved fire protection or sprinkler topics and documented for audit at license renewal; unapproved hours do not count.