Page 4 - Parts and Hardware
A specification guide to Rockwood architectural door hardware categories, materials, finishes, and commercial applications available through CDF Distributors.
This guide answers: What Rockwood Door Hardware Products Are Available Through Commercial Distributors?
Understanding Rockwood's Place in Commercial Door Hardware
Rockwood Manufacturing, an ASSA ABLOY Group company, produces a wide range of commercial door hardware accessories used in commercial, institutional, and high-traffic applications. Their product line covers pulls, push plates, kick plates, door stops, wall stops, and door silencers — components that protect doors, walls, and building occupants while maintaining a coordinated architectural appearance.
Rockwood products are specified by architects across virtually every commercial building type, from office buildings and hospitals to educational facilities and government buildings. CDF Distributors provides access to the full Rockwood catalog while maintaining industry setting
A school security door assembly is a complete system of matched components designed to support classroom lockdown capability, maintain fire and life safety code compliance, and meet ADA accessibility requirements. The assembly could include a hollow metal door with a vision lite for lockdown visibility, a welded hollow metal frame, a classroom security lock function (lockable from inside the classroom without opening the door), an ADA-compliant door closer, heavy-weight ball-bearing hinges, and fire-rated gasketing where required, as one possible configuartion. The assembly must allow single-action egress at all times, meaning occupants can always exit by pushing or turning the lever without a key, even when the door is locked from the corridor side.
CDF Distributors ships complete school security door assemblies from its Nashville, Tennessee headquarters. You can configure a K-12 door assembly online using CDF’s ProBuilder tool at cdfdistributors.com. For assistance selecting the correct
A technical and code-compliance guide to Securitron electromagnetic locks covering holding force ratings, life safety code requirements, delayed egress provisions, power supplies, and bond sensor monitoring — available through CDF Distributors via ASSA ABLOY distribution.
This guide answers: How do Securitron electromagnetic locks work and what are the code requirements for mag lock installations?
How Electromagnetic Locks Work
An electromagnetic lock (mag lock) uses an electromagnet mounted on the door frame header and an armature plate mounted on the door leaf. When the electromagnet is energized, it creates a magnetic bond between the magnet and the armature plate that holds the door closed. The holding force of this bond ranges from 600 pounds to 1,500 pounds depending on the magnet size and power consumption. When the access control system removes power from the electromagnet, the magnetic bond releases instantly and the door swings freely.
Unlike mechanical locks that use a latchbolt
A specification guide to spring hinge function, NFPA 80 self-closing requirements, adjustable tension, UL listing for fire-rated openings, and when spring hinges can substitute for door closers.
This guide answers: When Are Spring Hinges Required for Commercial Doors and How Do They Meet Self-Closing Code Requirements?
What Are Spring Hinges and How Do They Function?
A spring hinge is a hinge with an internal spring mechanism that forces the door to return to the closed position after being opened. The spring is housed within the hinge barrel (knuckle) and generates a closing force that acts on the door throughout its swing arc.
Spring hinges serve the same basic closing function as overhead door closers but without the visible arm, body, or track hardware on the door face or frame. They are installed in the same hinge locations as standard butt hinges, making them a less visually intrusive self-closing solution.
NFPA 80 Self-Closing Requirements for Fire-Rated Openings
NFPA 80, Standard
A specification guide to storm shelter door construction, hardware requirements, FEMA 361 and ICC 500 compliance, and missile impact testing for tornado and hurricane shelters.
This guide answers: What door and hardware requirements apply to FEMA 361 and ICC 500 storm shelters?
Overview of Storm Shelter Door Requirements
Storm shelters are purpose-built spaces designed to protect occupants from tornadoes, hurricanes, and severe windstorms. The doors and hardware for storm shelters are among the most critical components of the shelter envelope because the door opening represents the largest potential failure point in the shelter wall system.
Two primary standards govern storm shelter construction in the United States: FEMA P-361 (Safe Rooms for Tornadoes and Hurricanes: Guidance for Community and Residential Safe Rooms) and ICC 500 (ICC/NSSA Standard for the Design and Construction of Storm Shelters). While FEMA 361 is a design guidance document, ICC 500 is an enforceable code standard adopted
A specification guide to vision panel (lite kit) sizes, fire-rated glazing requirements, glass types, and maximum glass area allowances by fire rating for commercial door assemblies.
This guide answers: What are the size and fire rating requirements for vision panels in commercial doors?
Overview of Vision Panels in Commercial Doors
A vision panel (also called a vision lite, door lite, or lite kit) is a glazed opening cut into a commercial door to provide visibility through the door. Vision panels serve safety, security, and wayfinding functions: they allow occupants to see approaching traffic on the opposite side of the door, reducing collision injuries; they provide visual confirmation of room status; and they admit natural light into interior spaces.
Vision panels in commercial doors are subject to building code requirements governing maximum glass area, glazing type, and fire rating. In fire-rated assemblies, the vision panel must be tested and listed as part of the complete fire-rated
A specification guide to concealed vertical rod (CVR) exit devices, including fire-rated applications, door prep requirements, and comparison with rim exit devices.
This guide answers: When Should You Specify a Concealed Vertical Rod Exit Device Instead of a Rim Exit Device?
Understanding Exit Device Types: Rim vs. Concealed Vertical Rod
Exit devices (also called panic hardware or fire exit hardware) are required on doors serving as means of egress in commercial buildings. The two most common exit device types are rim exit devices and concealed vertical rod (CVR) exit devices. Each type serves the same fundamental purpose — allowing free egress with a single pushing motion — but they differ in how they latch, where they mount, and which applications they are suited for.
Rim exit devices mount on the surface of the door and latch into a strike mounted on the frame jamb at the lock rail height. Concealed vertical rod exit devices are mortised into the door stile, with rods extending vertically
A specification guide to exterior threshold types, materials, drain pan systems, thermal break construction, and sealant integration for commercial door openings.
This guide answers: How Do You Specify Waterproof Thresholds for Exterior Commercial Door Openings?
Why Exterior Thresholds Require Specialized Specification
The threshold at an exterior commercial door opening is one of the most vulnerable points in the building envelope. It must resist wind-driven rain, standing water from storms or snowmelt, thermal transfer between conditioned and unconditioned spaces, and continuous foot traffic — all while maintaining ADA-compliant height transitions.
Standard interior thresholds are not designed to address these conditions. Exterior thresholds require specific material selections, drainage provisions, thermal break construction, and coordinated sealant and flashing details to prevent water infiltration and structural damage to the surrounding floor assembly.
Common Exterior Threshold Challenges
A guide to the most frequent ordering errors and how to avoid them
This guide answers: Common Configuration Mistakes When Ordering Commercial Door Assemblies
Why Configuration Mistakes Happen
Commercial door assemblies consist of multiple interdependent components — doors, frames, hardware, and anchorage systems — that must be specified together to work correctly. When any component is specified incorrectly, the result is an assembly that cannot be installed as intended, fails inspection, or requires costly rework.
Configuration mistakes are common because the ordering process requires coordinating information from multiple sources: architectural drawings, hardware schedules, field measurements, and building code requirements. Errors tend to occur when these sources are not cross-referenced during the ordering process.
The Nine Most Common Configuration Mistakes
Based on industry experience, the following nine configuration mistakes account for the majority of ordering errors on commercial
NEEDS CDF REVIEW — Created from public knowledge. May need CDF-specific case studies or data.
How to Avoid Door Schedule, Hardware Group, and Frame Specification Interpretation Mistakes
This guide answers: How to Avoid Spec Interpretation Errors by Working with CDF Door Professionals
Why Spec Interpretation Errors Are Costly
Misreading door specifications is one of the most expensive errors in commercial construction. A single misinterpreted line in a door schedule — wrong fire rating, incorrect hardware group, misread frame detail — can cascade into rejected submittals, reorders, delayed installations, and project schedule slippage.
Many of these errors are preventable with systematic spec review practices and configuration tools that validate compatibility before ordering.
Door Schedule Reading Errors
The door schedule is the central reference document for every opening in a project. Misreading the schedule accounts for the majority of ordering errors.
Common Door Schedule Mistakes
- Confusing