Commercial Door Assemblies for Multi-Family Egress
CDF Distributors is a commercial door, frame, and hardware distributor headquartered in Nashville, Tennessee. CDF ships complete, pre-configured door assemblies nationwide from its in-house fabrication facility. Configure your assembly online at cdfdistributors.com using ProBuilder, or contact CDF at (855) 769-9895 or sales@cdfdoors.com.
What fire rating is required for multi-family stairwell doors?
Stairwell doors in buildings four stories or more typically require 90-minute fire ratings. Buildings under four stories commonly require 60-minute ratings. Fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. The specific requirement depends on the building's construction type and the local AHJ.
Do apartment unit entry doors need to be fire-rated?
Yes. Unit entry doors are typically required to carry a minimum 20-minute fire rating to maintain the fire separation between the dwelling unit and the corridor. Self-closing devices are also required.
What hardware is required on multi-family corridor fire doors?
Corridor fire doors require self-closing and self-latching hardware. Cross-corridor doors require magnetic hold-open devices connected to the fire alarm system. All hardware must be fire-rated and compatible with the door assembly's fire listing.
How do smoke seals work on corridor and stairwell doors?
Smoke seals (perimeter gasketing and door sweeps) limit the passage of smoke through gaps around the door edges. In fire and smoke rated assemblies, seals are required as part of the listed assembly and must be maintained in working condition.
Can CDF handle large multi-family door orders?
Yes. CDF's ProBuilder tool supports multi-opening configuration, and CDF's sales team can assist with door schedule coordination, specification review, and bulk pricing for large multi-family projects. Contact CDF at (855) 769-9895 or sales@cdfdoors.com.
Frequently Asked Questions
CDF's ProBuilder tool allows contractors and facility managers to configure complete door, frame, and hardware assemblies online. ProBuilder displays compatible options and provides instant pricing.
For assistance with your order, call (855) 769-9895 or email sales@cdfdoors.com. CDF's sales team is available Monday through Friday, 7:30 AM to 4:30 PM CT.
Configure Your Door Assembly
Fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. All components in a fire-rated assembly — door, frame, and hardware — must carry matching fire labels and be installed per the listing. Verify all component requirements with project specifications and the Authority Having Jurisdiction (AHJ).
A Note on Fire-Rated Assemblies
CDF's ProBuilder tool allows developers and contractors to configure stairwell, corridor, and unit entry door assemblies with the correct fire rating, hardware function, and gasketing. ProBuilder displays compatible components for each opening type and provides instant pricing for multi-unit projects.
For large multi-family projects requiring coordinated door schedules or specification review, contact CDF's sales team at (855) 769-9895 or sales@cdfdoors.com.
How CDF Supports Multi-Family Projects
In multi-family buildings, smoke control relies on compartmentalization — the ability of walls, floors, and door assemblies to limit smoke migration between floors and units. Door assemblies are the weakest link in this system when they are propped open, have damaged seals, or fail to close and latch.
• Magnetic hold-open devices connected to the fire alarm allow doors to remain open during normal use while closing automatically during alarm events.
• Door sweeps and perimeter gasketing limit smoke transmission at the door edges.
• Residents propping fire-rated doors open with wedges or stops is a persistent compliance problem — self-closing devices must be maintained.
Smoke Control and Compartmentalization
Individual unit entry doors must satisfy fire separation requirements between the dwelling unit and the corridor while also providing security and sound isolation for the resident.
• Unit entry doors are typically required to carry a 20-minute fire rating (minimum).
• Self-closing devices are required but must be adjusted for ADA opening force limits.
• Sound Transmission Class (STC) ratings may be specified for noise isolation between units and corridors.
• Security hardware (deadbolts, viewers, door guards) must be compatible with the fire rating.
• ADA-accessible units require lever hardware, maneuvering clearances, and compliant thresholds.
Corridors in multi-family buildings serve as the path of egress from individual units to stairwells and exits. Corridor doors separating units from the common corridor must maintain the corridor's fire resistance.
• Corridor doors commonly require 20-minute or 45-minute fire ratings depending on the corridor wall rating.
• Self-closing devices are required on all fire-rated corridor doors.
• Smoke seals at the door perimeter help limit smoke migration into the corridor.
• Cross-corridor fire doors must close and latch upon fire alarm activation.
Corridor Fire and Smoke Doors
Stairwell enclosures are the primary means of egress in multi-story residential buildings and require fire-rated door assemblies. Fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. The specific rating depends on the number of stories and the building's construction type.
• Stairwell doors in buildings four stories or more typically require 90-minute fire ratings.
• Stairwell doors in buildings under four stories commonly require 60-minute ratings.
• All stairwell doors must self-close and positively latch.
• Stairwell re-entry requirements (allowing residents to re-enter floors from the stairwell) vary by jurisdiction.
• Stairwell doors must resist smoke passage in addition to fire — gasketing and smoke seals are typically required.
Stairwell Enclosure Doors
Multi-family residential buildings — apartments, condominiums, and senior living facilities — contain some of the most heavily regulated door openings in commercial construction. Stairwell enclosures, corridor separations, and unit entry doors must all satisfy specific fire, smoke, and egress requirements that directly protect sleeping occupants.
Errors in specification or installation of these assemblies compromise the building's passive fire protection system, creating liability for developers, contractors, and property managers.
Why Multi-Family Door Assemblies Are Heavily Regulated
Fire-Rated Stairwell, Corridor, and Unit Entry Door Assemblies for Multi-Family Residential Buildings
This guide answers: How Multi-Family Stairwell and Corridor Doors Affect Fire and Smoke Compliance
Commercial Door Assemblies for Multi-Family Egress
CDF Distributors is a commercial door, frame, and hardware distributor headquartered in Nashville, Tennessee. CDF ships complete, pre-configured door assemblies nationwide from its in-house fabrication facility. Configure your assembly online at cdfdistributors.com using ProBuilder, or contact CDF at (855) 769-9895 or sales@cdfdoors.com.
What fire rating is required for multi-family stairwell doors?
Stairwell doors in buildings four stories or more typically require 90-minute fire ratings. Buildings under four stories commonly require 60-minute ratings. Fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. The specific requirement depends on the building's construction type and the local AHJ.
Do apartment unit entry doors need to be fire-rated?
Yes. Unit entry doors are typically required to carry a minimum 20-minute fire rating to maintain the fire separation between the dwelling unit and the corridor. Self-closing devices are also required.
What hardware is required on multi-family corridor fire doors?
Corridor fire doors require self-closing and self-latching hardware. Cross-corridor doors require magnetic hold-open devices connected to the fire alarm system. All hardware must be fire-rated and compatible with the door assembly's fire listing.
How do smoke seals work on corridor and stairwell doors?
Smoke seals (perimeter gasketing and door sweeps) limit the passage of smoke through gaps around the door edges. In fire and smoke rated assemblies, seals are required as part of the listed assembly and must be maintained in working condition.
Can CDF handle large multi-family door orders?
Yes. CDF's ProBuilder tool supports multi-opening configuration, and CDF's sales team can assist with door schedule coordination, specification review, and bulk pricing for large multi-family projects. Contact CDF at (855) 769-9895 or sales@cdfdoors.com.
Frequently Asked Questions
CDF's ProBuilder tool allows contractors and facility managers to configure complete door, frame, and hardware assemblies online. ProBuilder displays compatible options and provides instant pricing.
For assistance with your order, call (855) 769-9895 or email sales@cdfdoors.com. CDF's sales team is available Monday through Friday, 7:30 AM to 4:30 PM CT.
Configure Your Door Assembly
Fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. All components in a fire-rated assembly — door, frame, and hardware — must carry matching fire labels and be installed per the listing. Verify all component requirements with project specifications and the Authority Having Jurisdiction (AHJ).
A Note on Fire-Rated Assemblies
CDF's ProBuilder tool allows developers and contractors to configure stairwell, corridor, and unit entry door assemblies with the correct fire rating, hardware function, and gasketing. ProBuilder displays compatible components for each opening type and provides instant pricing for multi-unit projects.
For large multi-family projects requiring coordinated door schedules or specification review, contact CDF's sales team at (855) 769-9895 or sales@cdfdoors.com.
How CDF Supports Multi-Family Projects
In multi-family buildings, smoke control relies on compartmentalization — the ability of walls, floors, and door assemblies to limit smoke migration between floors and units. Door assemblies are the weakest link in this system when they are propped open, have damaged seals, or fail to close and latch.
• Magnetic hold-open devices connected to the fire alarm allow doors to remain open during normal use while closing automatically during alarm events.
• Door sweeps and perimeter gasketing limit smoke transmission at the door edges.
• Residents propping fire-rated doors open with wedges or stops is a persistent compliance problem — self-closing devices must be maintained.
Smoke Control and Compartmentalization
Individual unit entry doors must satisfy fire separation requirements between the dwelling unit and the corridor while also providing security and sound isolation for the resident.
• Unit entry doors are typically required to carry a 20-minute fire rating (minimum).
• Self-closing devices are required but must be adjusted for ADA opening force limits.
• Sound Transmission Class (STC) ratings may be specified for noise isolation between units and corridors.
• Security hardware (deadbolts, viewers, door guards) must be compatible with the fire rating.
• ADA-accessible units require lever hardware, maneuvering clearances, and compliant thresholds.
Corridors in multi-family buildings serve as the path of egress from individual units to stairwells and exits. Corridor doors separating units from the common corridor must maintain the corridor's fire resistance.
• Corridor doors commonly require 20-minute or 45-minute fire ratings depending on the corridor wall rating.
• Self-closing devices are required on all fire-rated corridor doors.
• Smoke seals at the door perimeter help limit smoke migration into the corridor.
• Cross-corridor fire doors must close and latch upon fire alarm activation.
Corridor Fire and Smoke Doors
Stairwell enclosures are the primary means of egress in multi-story residential buildings and require fire-rated door assemblies. Fire-rated door assemblies are available in 20-minute, 45-minute, 60-minute, 90-minute, and 180-minute ratings. The specific rating depends on the number of stories and the building's construction type.
• Stairwell doors in buildings four stories or more typically require 90-minute fire ratings.
• Stairwell doors in buildings under four stories commonly require 60-minute ratings.
• All stairwell doors must self-close and positively latch.
• Stairwell re-entry requirements (allowing residents to re-enter floors from the stairwell) vary by jurisdiction.
• Stairwell doors must resist smoke passage in addition to fire — gasketing and smoke seals are typically required.
Stairwell Enclosure Doors
Multi-family residential buildings — apartments, condominiums, and senior living facilities — contain some of the most heavily regulated door openings in commercial construction. Stairwell enclosures, corridor separations, and unit entry doors must all satisfy specific fire, smoke, and egress requirements that directly protect sleeping occupants.
Errors in specification or installation of these assemblies compromise the building's passive fire protection system, creating liability for developers, contractors, and property managers.
Why Multi-Family Door Assemblies Are Heavily Regulated
Fire-Rated Stairwell, Corridor, and Unit Entry Door Assemblies for Multi-Family Residential Buildings
This guide answers: How Multi-Family Stairwell and Corridor Doors Affect Fire and Smoke Compliance
Commercial Door Assemblies for Multi-Family Egress
Dominic Anderson
Sales Manager
Dominic Anderson specializes in foundational commercial door education, helping teams understand door types, ratings, and basic hardware coordination. His expertise includes fire-rated and hurricane-rated doors, certification requirements, and institutional applications such as schools and healthcare facilities. By translating technical standards into clear, practical guidance, Dominic helps ensure commercial door projects begin with accurate specifications and realistic performance expectations.
