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New Mercantile Occupancies — Life Safety Requirements

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New Mercantile Occupancies — NFPA 101 (2018) Chapter 36

This comprehensive guide covers the complete requirements for New Mercantile occupancies in NFPA 101:2018 (Chapter 36). Section numbers map directly to the Code.

Table of Contents

  1. Classification (Class A/B/C)
  2. Means of Egress (36.2 & Ch. 7)
  3. Detection, Alarm & Notification (36.3.4)
  4. Automatic Sprinklers & Extinguishment (36.3.5)
  5. Corridors & Openings (36.3.6)
  6. Special Provisions — Malls, High‑Rise, Underground (36.4)
  7. Quick‑Reference Tables
  8. Design/Review Checklist
  9. References

1) Classification (Class A/B/C)

  • Class A: Aggregate gross area > 30,000 ft² or > 3 stories used for sales.
  • Class B: 3,000–30,000 ft² and ≤ 3 stories for sales, or ≤ 3,000 ft² but occupying two/three stories.
  • Class C: ≤ 3,000 ft², one story for sales.

See 36.1.2.2.1 and related notes for aggregate area calculations and separated tenants.

2) Means of Egress (36.2 & Chapter 7)

Apply general egress rules from Chapter 7 and specific mercantile provisions in 36.2 (aisles, exit access, special mall provisions).

3) Detection, Alarm & Notification (36.3.4)

  • Class A mercantile shall be provided with a fire alarm system per 9.6 (36.3.4.1).
  • Occupant notification methods and emergency forces notification per 36.3.4.3 → 9.6.3, 9.6.4.

4) Automatic Sprinklers & Extinguishment (36.3.5)

Sprinkler triggers — provide sprinklers in the following cases (36.3.5.1):

  • All mercantile occupancies three or more stories in height (36.3.5.1(1)).
  • All mercantile occupancies with aggregate gross area > 12,000 ft² (36.3.5.1(2)).
  • Stories below the level of exit discharge used for sale/storage/handling of combustibles and exceeding 2500 ft² (36.3.5.1(3)).
  • Multiple occupancies protected as mixed occupancies where the above conditions apply to the mercantile portion (36.3.5.1(4)).

Class A supervision per 36.3.5.2. Provide portable extinguishers throughout per 9.9 (36.3.5.3).

5) Corridors & Openings (36.3.6)

Where access to exits is via corridors, provide 1‑hour fire barrier separation (Section 8.3) except where exits are available from an open floor area, within single‑tenant spaces, or where the building is protected throughout by an approved, supervised sprinkler system per 9.7.1.1(1) (36.3.6.1).

6) Special Provisions — Malls, High‑Rise, Underground (36.4)

  • High‑rise mercantile: comply with 11.8.
  • Limited access/underground: see 11.7.
  • Open‑air mercantile: see 36.4.3.

7) Quick‑Reference Tables

Table A — Sprinkler Triggers (36.3.5.1)

Condition Requirement Reference
≥ 3 stories Sprinklers throughout 36.3.5.1(1) → 9.7
Gross area > 12,000 ft² Sprinklers throughout 36.3.5.1(2) → 9.7
Below discharge level (combustibles, > 2500 ft²) Sprinklers on those stories 36.3.5.1(3)
Mixed occupancies (conditions met) Sprinklers to mercantile 36.3.5.1(4)

Table B — Corridors (Separation & Exceptions)

Item Requirement Reference
Separation 1‑hour fire barriers 36.3.6.1 → 8.3
Exceptions Open floor, single tenant, fully sprinklered 36.3.6.1(1)–(3), 9.7.1.1(1)

8) Design/Review Checklist

  1. Confirm mercantile class (A/B/C) and aggregate areas (36.1.2.2.1).
  2. Verify egress per 36.2 and Chapter 7 (number, remoteness, discharge, lighting, signs).
  3. Apply 36.3.4 alarm provisions; design to 9.6/NFPA 72.
  4. Evaluate 36.3.5.1 sprinkler triggers; apply NFPA 13.
  5. Check corridors/openings per 36.3.6 and 8.3.
  6. Cross‑check 11.7 (underground) and 11.8 (high‑rise) where applicable.

9) References

  • NFPA 101:2018 — Chapters 6, 7, 8, 9, 36, 11.7, 11.8
  • NFPA 13, NFPA 72, NFPA 10

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