Von Duprin 5575F-3ft Fire Rated Narrow Stile Crossbar Mortise Lock Exit Device, Less Dogging, 36"

Von Duprin 5575F-3ft Fire Rated Narrow Stile Crossbar Mortise Lock Exit Device, Less Dogging, 36"

Classic Crossbar Design with Fire-Rated Mortise Lock Performance for Narrow Stile Doors

The Von Duprin 5575F-3ft is a fire-rated narrow stile crossbar mortise lock exit device from the trusted 55 Series, engineered for 3-foot (36") single door applications. Designed to fit door stiles as narrow as 4-3/4" (121 mm) and specified for 2-1/4" doors with a door thickness of 1-3/4", this device is UL listed for up to 3-hour labeled fire installations on 4' x 10' (1219 mm x 3048 mm) single or 8' x 8' (2438 mm x 2438 mm) double metal doors. The integrated 7500 mortise lock features a 3/4" (19 mm) anti-friction latch bolt that is field reversible without removing the lock from the door, along with a non-handed auxiliary bolt for deadlocking and a faceplate with an adjustable bevel. Certified to ANSI/BHMA A156.3, 2008 Grade 1 standards, this device delivers professional-grade reliability for demanding commercial environments.

Professional Features & Benefits

• Narrow Stile Compatibility: Fits door stiles as narrow as 4-3/4" (121 mm), specified for 2-1/4" doors, making it ideal for narrow stile metal door applications where space is limited.
• Fire-Rated Construction: UL listed for up to 3-hour labeled fire installations, compliant with ANSI/UL 10C and CAN/ULC-S104 fire rating standards for maximum life-safety protection.
• Field-Reversible Latch: The 7500 mortise lock features a 3/4" (19 mm) anti-friction latch bolt that is field reversible without removing the lock from the door, simplifying installation and handing adjustments.
• Deadlocking Auxiliary Bolt: Non-handed auxiliary bolt provides positive deadlocking action, enhancing security and preventing latch manipulation.
• Adjustable Bevel Faceplate: Faceplate with adjustable bevel accommodates varying door edge preparations for a precise, professional fit.
• Grade 1 Certified Performance: ANSI/BHMA A156.3, 2008 Grade 1 certified, along with ANSI/UL 305, CAN/ULC-S132 compliance, ensuring the highest level of commercial exit device performance.
• Classic 55 Series Crossbar Design: The 55 Series narrow stile crossbar is commonly used in retro-inspired architecture and historical buildings, offering both aesthetic appeal and reliable egress performance.
• Flexible Length Options: Available in 3' and 4' lengths that are field sizeable for single and double door applications, providing versatile configuration options.
• Optional Electronic & Mechanical Upgrades: Compatible with E8875 option for pairing with access control, fire alarm, or remote switching systems; RX switch for door monitoring; and KN knurling on crossbars for tactile hazard warnings.
• Wood Door Compatibility: Wood door installations require 589 cover plate (specified separately) for proper integration.

Technical Specifications

• Product Group: Exit Devices and Trim
• Series: 55 Series
• Grade: Grade 1
• Fasteners: Screw pack for 1-1/4" and 2-1/4" thick medal/wood doors.
• Product Subgroup: Exit Devices - Mortise
• Product Type: Exit Devices - Mortise
• Subcategory: Mortise Exit Devices
• Latch Throw: 1/2"
• Commercial/Residential: Commercial
• Stile Type: Narrow Stile
• Door Hand Direction: Field Reversible
• Door Thickness Range: 1-3/4"
• Product Size: 36"
• Dogging Configuration: Hex Key Dogging
• Product Dimension: 7-1/4" x 1-1/4" x 2-1/4" (Hinge Stile Case), 7-1/4" x 1-1/4" x 2-1/4" (Lock Stile Case)
• Fire Rating: Yes
• Product Projection: 3-3/4"
• Product Style: Cross Bars
• Product Category: Exit Devices and Trim
• Department: Door Hardware

Professional Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Industrial and Warehouse Facilities
• Historical and Retro-Inspired Architecture
• Government and Municipal Buildings

Why Choose Von Duprin Quality?

Von Duprin 55 Series mortise exit devices are engineered to meet the most demanding commercial life-safety requirements, certified to ANSI/BHMA A156.3, 2008 Grade 1 and UL listed for up to 3-hour fire-rated installations. The field-reversible 3/4" anti-friction latch bolt, non-handed auxiliary deadlocking bolt, and adjustable bevel faceplate reflect the precision engineering and installation flexibility that commercial door hardware professionals rely on. With compatibility for a wide range of trim options, electronic upgrades, and door configurations, Von Duprin 55 Series devices are a trusted solution wherever dependable egress performance is essential.