Covered mall buildings present some of the most complex fire safety challenges in commercial design. These large, interconnected structures combine multiple tenant spaces, high occupant loads, food courts, entertainment venues, and common pedestrian areas—all under a single roof.
Unlike conventional buildings where individual tenants are separated by fire barriers, malls create a continuous open space that must be carefully managed to prevent fire spread and ensure safe evacuation.
This guide explores the unique challenges and design strategies for fire safety in covered mall buildings.
◆ Section 1: Defining the Covered Mall Building
The International Building Code (IBC) provides specific definitions for mall buildings in Section 402 .
Key Definitions :
| Term | Definition |
|---|---|
| Covered Mall Building | A single building enclosing a number of tenants and occupants, such as retail stores, drinking and dining establishments, entertainment and amusement facilities, and other similar uses, wherein two or more tenants have a main entrance into one or more malls. Anchor buildings shall not be considered as a part of the covered mall building. |
| Mall | A roofed or covered common pedestrian area that serves as access for two or more tenants and does not exceed three levels that are open to each other. |
| Anchor Building | A building that houses any occupancy with low or ordinary hazard contents and has direct access to a mall structure, but possesses all required means of egress independent of the mall. |
Core Constraints :
| Requirement | Details |
|---|---|
| Maximum Height | Not exceeding three floor levels at any point nor more than three stories above grade plane. |
| Open Mall Allowance | Provisions also apply to open malls (unroofed common pedestrian ways) where equivalent or better life safety is provided . |
Pro Tip: The mall provisions are optional. A designer can choose to use them or instead protect the building as a multiple-occupancy building under Section 6.1.14 of NFPA 101 .
◆ Section 2: Occupant Load and Egress
Travel distance is a particular challenge in mall structures, especially in the mall corridor .
Occupant Load :
| Requirement | Details |
|---|---|
| Tenant Spaces | Calculated in accordance with Chapter 10 based on the specific use. |
| Anchors | Not considered part of the mall for egress calculations. |
Mall Width Requirements (NYC Building Code) :
| Requirement | Details |
|---|---|
| Aggregate Clear Width | Not less than 20 feet (6,096 mm). |
| Minimum Portion | No portion of the required width shall be less than 10 feet (3,048 mm) measured to a height of 8 feet (2,438 mm). |
| Obstructions | Width measured between projections from tenant spaces and the nearest kiosk, vending machine, bench, display opening, food court, or other obstruction. |
Key Egress Distinction :
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Travel distance within the tenant space must comply with the occupancy chapter.
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Travel distance within the mall corridor is measured to an exit.
◆ Section 3: Automatic Sprinkler Systems
Covered and open mall buildings must be protected throughout with an automatic sprinkler system in accordance with IBC Section 903.3.1.1 .
Key Sprinkler Requirements :
| Requirement | Details |
|---|---|
| Complete and Operative | System must be complete and operative throughout occupied space prior to occupancy of any tenant spaces. |
| Unoccupied Tenant Spaces | Must be similarly protected unless approved alternative protection is provided. |
| Mall Sprinkler Independence | Sprinkler protection for the mall must be independent from that provided for tenant spaces or anchor buildings. |
| Tenant Space Control | Where tenant spaces are supplied by the same system, they must be independently controlled. |
| Exterior Balconies | Sprinkler protection must be provided beneath exterior circulation balconies located adjacent to an open mall. |
Pro Tip: In the open mall concept, an unroofed common pedestrian way provides natural ventilation, and mechanical smoke control is no longer necessary in the mall area and adjoining tenant spaces .
◆ Section 4: Smoke Control
Smoke control provisions apply where a covered mall building contains an atrium or connects more than two stories .
IBC Requirements :
| Condition | Requirement |
|---|---|
| Atrium in Mall | Smoke control system required in accordance with Section 404.4 (atriums) . |
| Mall Connecting More Than Two Stories | Smoke control system complying with Section 909 required . |
| Exception | Smoke control is not required for atriums that connect only two stories . |
NFPA 101 Requirements :
| Requirement | Details |
|---|---|
| Smoke Layer Interface | Smoke layer interface must be maintained at least 6 feet (1,830 mm) above the highest walking surface open to the mall. |
| Duration | This condition must be maintained for 1.5 times the calculated evacuation time, or 20 minutes—whichever is longer. |
| Engineered Analysis | For open malls, an engineering analysis can demonstrate compliance with the smoke layer interface requirement . |
Pro Tip: If a building has a mall corridor connecting more than three levels, it cannot be considered a mall corridor under NFPA 101, meaning the special provisions of 36/37.4.4 do not apply .
◆ Section 5: Kiosks and Temporary Structures
Kiosks and similar structures located within the mall are subject to specific requirements .
Kiosk Requirements (IBC) :
| Requirement | Details |
|---|---|
| Combustible Materials | Must be constructed of fire-retardant-treated wood, foam plastics with a maximum heat-release rate ≤100kW, or aluminum composite material meeting Class A interior finish requirements. |
| Sprinkler and Detection | Must be provided with approved automatic sprinkler system and detection devices. |
| Separation | Horizontal separation between kiosks or groupings must be not less than 20 feet (6,096 mm). |
| Maximum Area | Each kiosk or grouping shall have an area not greater than 300 square feet (28 m²). |
Operational Permits (Harris County, TX) :
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Annual permits are required for the placement of retail fixtures and displays, concession equipment, and displays of highly combustible goods in the mall.
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Kiosks and displays must be included in the emergency plan.
◆ Section 6: Fire Alarm and Detection
NFPA 101 Requirements :
The special provisions for mall structures include occupant notification and automatic sprinkler systems, addressing the unique challenges of large retail spaces.
Anchors vs. Mall Spaces:
Anchor buildings must have complete egress facilities, including the required number and capacity of exits, independent of the covered or open mall building . This ensures that anchor tenants are not dependent on the mall for occupant evacuation.
◆ Section 7: Emergency Planning and Permits
Emergency Plan :
Covered mall buildings require an emergency plan compliant with Chapter 4 of the International Fire Code.
Documents Required for Permit :
| Document | Details |
|---|---|
| Site Map | Location of fire suppression systems, fire lanes, gas meters, and Knox Box. |
| Floor Plan | All entrances and exits, primary and secondary exit routes, fire extinguisher locations, fire protection system panels, risers, and suite identification. |
| Emergency Plan | Compliant with IFC Chapter 4. |
| Fire Alarm Information | Type of system and last inspection date. |
| Sprinkler Information | Type of system and last inspection date. |
| Fire Extinguisher Information | Type and last inspection date. |
Permit Renewal: Covered mall facility permits must be renewed annually or anytime kiosks or displays move in and out of the mall area .
◆ Section 8: Special Considerations
A. Food Courts
Food courts in malls create additional fire hazards from cooking operations. The fire safety plan must include provisions for kitchen hood suppression systems and grease management.
B. Entertainment Venues
Malls increasingly include movie theaters, bowling lanes, ice arenas, and other entertainment facilities . These spaces have higher occupant loads and unique egress requirements.
C. Temporary Displays and Events
Seasonal displays and events can create additional fire loads and obstruct egress. Permits may be required for these activities .
◆ Section 9: Design Checklist
Use this checklist to verify fire safety provisions in covered mall design:
| Item | Status | Notes |
|---|---|---|
| Automatic Sprinkler System | ☐ | Throughout the mall and all tenant spaces . |
| Mall Sprinkler Independence | ☐ | Separate from tenant spaces . |
| Mall Width (≥ 20 ft) | ☐ | Minimum aggregate width . |
| Tenant Egress Independent | ☐ | Each tenant has its own required exits . |
| Anchor Building Egress | ☐ | Independent from the mall . |
| Smoke Control | ☐ | Where atrium or >2 stories . |
| Kiosk Compliance | ☐ | Sprinklered and separation requirements . |
| Emergency Plan | ☐ | IFC Chapter 4 compliant . |
| Annual Permit | ☐ | Renewed as required . |
◆ Section 10: Common Mistakes and How to Avoid Them
| Mistake | Why It’s a Problem | How to Fix |
|---|---|---|
| Assuming mall provisions always apply | May lead to non-compliance for multi-level buildings. | Check if the building meets the definition of a mall under the applicable code. |
| Inadequate mall width | Egress is blocked by kiosks and displays. | Maintain 20 ft aggregate width and 10 ft minimum clear width . |
| Not separating tenant sprinklers | A fire in one tenant can shut down the entire mall. | Ensure mall sprinklers are independent from tenant spaces . |
| Ignoring kiosk requirements | Combustible kiosks without sprinklers create a fire hazard. | Meet kiosk construction, sprinkler, and separation requirements . |
| No emergency plan | Occupants are unprepared for a fire. | Develop and maintain an emergency plan . |
◆ Conclusion
Covered mall buildings present unique fire safety challenges that require careful attention to egress, sprinkler protection, smoke control, and ongoing operational permits. By understanding the definitions, applying the correct code provisions, and maintaining proper documentation, you can design and operate safe mall environments.
Take Action Today:
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Determine if your building is a covered mall building under the applicable code.
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Provide independent sprinkler systems for the mall and tenant spaces.
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Maintain adequate mall width for egress.
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Address kiosk requirements for construction, sprinkler protection, and separation.
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Develop and maintain an emergency plan and annual permits.
Continue Reading from Our Series:
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