Von Duprin 3348A/3548A-4 Concealed Vertical Rod Exit Device - 4-Foot Narrow Stile, Grade 1

Von Duprin 3348A/3548A-4 Concealed Vertical Rod Exit Device - 4-Foot Narrow Stile, Grade 1

Heavy-Duty Concealed Vertical Rod Panic Hardware for Hollow Metal Single and Double Doors

The Von Duprin 3348A/3548A-4 is a 4-foot concealed vertical rod exit device engineered for hollow metal single and double doors in demanding institutional environments. Certified to ANSI/BHMA A156.3 2014 Grade 1 and UL listed for panic exit hardware, this device fits door stiles as narrow as 2-1/8" (44 mm) and accommodates a door thickness of 1-3/4". The 3548A features a smooth mechanism case while the 3348A features a grooved mechanism case, and both share a newly designed one-piece center case cover. The device is non-handed except when the SS (Signal Switch) option is used, offering flexible installation across a wide range of openings.

Professional Features & Benefits

• Narrow Stile Compatibility: Fits door stiles as narrow as 2-1/8" (44 mm), making it ideal for narrow stile hollow metal single and double door applications.
• ANSI/BHMA Grade 1 Certified: Certified to ANSI/BHMA A156.3 2014 Grade 1 and UL listed under ANSI/UL 10C (fire-rated configurations) and ANSI/UL 305, ensuring compliance with the highest industry standards.
• Concealed Vertical Rod Design with 1-1/2" Latch Throw: The 48-series concealed vertical rod mechanism features a 1-1/2" bottom bolt latch throw for secure, reliable door latching in high-traffic applications.
• Non-Handed Configuration: The device is non-handed (except when the SS Signal Switch option is used), simplifying specification and reducing inventory requirements for installers.
• Field-Configurable Options: A broad range of field-configurable options and retrofit kits are available, including CDSI/HDSI security dogging indicators, QEL electronic latch retraction, and electronic switches (Request to Exit RX and Latchbolt Monitoring LX) for access control integration.
• ADA-Accessible Option: The AX upgrade option is certified to meet the 5 lb. force requirements of the 2010 Americans with Disabilities Act (ADA) Chapters 404.2.7 and 30934, and the 2013 California Building Code Chapter 11B-309.4.
• Delayed Egress Option: The CX (CHEXIT) upgrade meets NFPA and IBC requirements for delayed egress, securing doors for 15 seconds after a request to exit while a nuisance alarm sounds.
• Hex Key Dogging: Equipped with hex key dogging for convenient hold-open functionality in appropriate applications.
• Versatile Trim and Function Options: Compatible with 360 lever/thumbpiece trim (Classroom, Passage, Dummy functions), 386 pull trim (Storeroom, Dummy), and 388 optional pull trim (Storeroom), as well as EO, DT, NL, NL-OP, L, L-BE, TL, TL-BE, T, and T-BE product functions.

Technical Specifications

• Product Group: Exit Devices and Trim
• Series: 33 & 35 Series
• Grade: Grade 1
• Fasteners: Includes 1-3/4" and 2-1/4" wood/metal door fasteners, SNB included
• Product Subgroup: Exit Devices - Vertical Rod
• Product Type: Exit Devices - Concealed Vertical Rod
• Subcategory: Concealed Vertical Rod Exit Devices
• Latch Throw: 1-1/2"
• Commercial/Residential: Commercial
• Device Centerline from Finished Floor: 39-13/16"
• Stile Type: Narrow Stile
• MAP Policy: Yes
• Product Model: 3348A/3548A-4'
• Product Function: EO, DT, NL, NL-OP, L, L-BE, TL, TL-BE, T, T-BE
• Door Hand Direction: Non-Handed
• Door Thickness Range: 1-3/4"
• Product Size: 48"
• Dogging Configuration: Hex Key Dogging
• Product Dimension: 8-3/16" x 1-9/16" x 2-13/32"
• Fire Rating: No
• Product Projection: 3-13/16"
• Product Style: Push Pads
• Product Category: Exit Devices and Trim
• Department: Door Hardware

Professional Applications

• Schools and Educational Facilities
• Hospitals and Healthcare Institutions
• Government and Municipal Buildings
• Commercial Office Buildings
• Retail Establishments
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties

Why Choose Von Duprin Quality?

Von Duprin concealed vertical rod exit devices are built to the highest industry standards, certified to ANSI/BHMA A156.3 2014 Grade 1 and listed under ANSI/UL 305 and ANSI/UL 10C for fire-rated configurations. The 3348A/3548A-4 is specifically designed for high-use and high-abuse institutional applications such as schools, hospitals, and government facilities, with a broad range of field-configurable retrofit options to keep pace with evolving technology. Engineered for demanding commercial applications where dependable panic hardware performance is essential.