Installing a surface-mounted commercial door closer requires selecting the correct mounting configuration, drilling from the manufacturer’s template, attaching the closer body and arm assembly, and adjusting closing speed valves to meet building code and ADA requirements. This guide covers the three standard mounting configurations—regular arm, parallel arm, and top jamb—along with template usage, valve adjustment procedures, ADA compliance for interior door opening force, and fire-rated assembly requirements.
CDF Distributors supplies complete commercial door and hardware assemblies from its Nashville, Tennessee headquarters. You can configure and order door closer assemblies online using CDF’s ProBuilder tool at cdfdistributors.com. For assistance selecting the correct closer for your project, call (855) 769-9895 or email sales@cdfdoors.com.
What Is a Surface-Mounted Door Closer?
A surface-mounted door closer is a hydraulic device installed on the face of a door or frame that controls the speed and force with which a door closes. The closer uses a spring to return the door to the closed position and a hydraulic fluid mechanism to regulate closing speed. Surface-mounted closers are the most common type used in commercial buildings because they are accessible for adjustment and maintenance without removing the door.
Every surface-mounted closer consists of two primary components: the closer body (which contains the spring and hydraulic valve assembly) and the arm (which connects the closer body to the door or frame). The mounting configuration determines where the closer body is installed and how the arm connects. Selecting the correct configuration depends on the door swing direction, frame type, and aesthetic requirements.
Mounting Configurations
Surface-mounted door closers can be installed in three standard configurations. Each configuration places the closer body and arm differently relative to the door and frame. The table below summarizes the three options, followed by detailed descriptions of each.
Regular Arm (Standard) | Closer body on pull side of door, arm extends toward frame. Most common configuration for interior doors. |
Parallel Arm | Closer body on push side of door, arm runs parallel to the door surface. Required when closer must be on push side. |
Top Jamb | Closer body mounted on the frame head (soffit), arm extends down to the door. Used when door surface mounting is not possible. |
Regular Arm (Standard) Mount
In the regular arm configuration, the closer body mounts on the pull (hinge) side of the door, and the arm extends from the closer body to a shoe (bracket) on the frame soffit or face. This is the most common mounting method for interior commercial doors. The regular arm provides the highest closing efficiency because the arm geometry creates a direct mechanical advantage. The closer body and arm are visible from the pull side of the door.
Side-view diagram showing: closer body mounted on pull side of door face, forearm extending to shoe bracket on frame soffit. Label hinge side, pull side, closer body, main arm, forearm, and frame shoe. This diagram requires CDF approval before inclusion in the production file.
Parallel Arm Mount
In the parallel arm configuration, the closer body mounts on the push (stop) side of the door, and the arm runs parallel to the door surface, connecting to a bracket mounted on the soffit of the frame. This configuration is commonly specified when the closer needs to be on the push side of the door for aesthetic or architectural reasons. Parallel arm mounting is the standard configuration for storefront and aluminum-framed doors. The arm is less visible because it lies flat against the door when closed.
Side-view diagram showing: closer body mounted on push side of door face, arm running parallel to door surface and connecting to bracket on frame soffit. Label push side, closer body, parallel arm, and soffit bracket. This diagram requires CDF approval before inclusion in the production file.
Top Jamb Mount
In the top jamb configuration, the closer body mounts on the frame head (the soffit or face of the top jamb), and the arm extends downward to a bracket on the top rail of the door. This configuration is used when the door face cannot accept the closer body, such as doors with narrow top rails, doors with glass panels extending to the top, or decorative doors where a face-mounted closer is not acceptable. Top jamb mounting produces slightly lower closing efficiency compared to regular arm mounting.
Side-view diagram showing: closer body mounted on frame head/soffit, arm extending downward to bracket on top rail of door. Label frame head, closer body, arm, door bracket, and top rail. This diagram requires CDF approval before inclusion in the production file.
Installation Specifications
Door closer sizing follows ANSI/BHMA A156.4 standards. Closers are rated by size number (1 through 6), which corresponds to the door width and weight they can control. Most standard commercial interior doors (36” wide, up to 150 lbs) require a size 3 or size 4 closer. Exterior doors and heavier assemblies may require size 5 or size 6. The table below provides general sizing guidance.
Door Closer Sizing Reference
Size 1 | Interior doors up to 27” wide |
Size 2 | Interior doors 28” to 32” wide |
Size 3 | Interior doors 33” to 36” wide, up to 110 lbs |
Size 4 | Interior/exterior doors 37” to 48” wide, up to 150 lbs |
Size 5 | Exterior doors up to 48” wide, up to 180 lbs |
Size 6 | Heavy exterior doors up to 48” wide, up to 220 lbs |
ADA Compliance: Interior Opening Force
The Americans with Disabilities Act (ADA) and ICC/ANSI A117.1 require that interior doors in accessible routes have a maximum opening force of 5 pounds-force (5 lbf) measured at the latch edge of the door. Fire-rated doors are exempt from the 5 lbf maximum when the Authority Having Jurisdiction (AHJ) determines that the fire rating requires higher closing force. However, the closer must still be adjusted to the minimum force necessary to achieve positive latching.
To test opening force, use a push-pull gauge (also called a door force gauge) at the latch edge of the door. The measurement is taken with the door at the closed position, pulling the door open to determine the initial force required. Adjust the spring tension and backcheck valve until the door meets the 5 lbf threshold while still latching positively.
Tools and Materials
- Manufacturer’s template: provided with the closer for marking drill hole locations
- Power drill: for drilling mounting holes in door and frame
- Drill bits: sizes as specified on the closer template, typically 1/8” pilot and 11/32” through-bolt
- Phillips screwdriver or bit: for machine screws and sheet metal screws
- Flat-blade screwdriver: for adjusting hydraulic valve screws on the closer body
- Tape measure: for verifying template placement and arm reach
- Pencil or scribe: for marking hole locations from the template
- Level: for ensuring the closer body is mounted level on the door face
- Step ladder: for accessing the top rail area of the door
- Allen wrench set: for set screws on some arm assemblies
- Push-pull gauge (door force gauge): for verifying ADA-compliant opening force (5 lbf maximum for interior doors)
- Sex bolts and machine screws: through-bolt fasteners for mounting closer body to door (typically provided with closer)
- Sheet metal screws: for mounting the arm bracket or shoe to the frame
- Thread-locking compound: for securing fasteners subject to vibration
Step-by-Step Installation
Step 1: Determine the Mounting Configuration
Before opening the closer packaging, determine which mounting configuration is required for your application. The three options are regular arm, parallel arm, and top jamb. Your project’s hardware schedule or door schedule will specify the mounting type. If no mounting type is specified, use the following guidelines.
- Regular arm: Use when the closer can be mounted on the pull (hinge) side of the door. This is the default for most interior commercial doors.
- Parallel arm: Use when the closer must be on the push (stop) side of the door, or when specified for storefront and aluminum-framed doors.
- Top jamb: Use when the door face cannot accommodate a closer body (narrow top rail, full-lite glass, or decorative requirements).
The mounting configuration determines which template sheet and which arm assembly to use. Most commercial closers ship with templates and hardware for all three configurations in one box.
Step 2: Position and Mark the Template
Every commercial door closer includes a paper or cardboard drilling template. The template is a full-scale pattern that shows the exact locations for all mounting holes. Using the template is not optional. Drilling without the template will result in misaligned holes.
- Select the correct template sheet for your mounting configuration (regular arm, parallel arm, or top jamb). Templates are typically printed on a single large sheet with all three configurations marked in different sections.
- Align the template to the top rail of the door and the frame as indicated by the printed alignment marks. Most templates reference the hinge edge of the door and the top of the door as datum points.
- Tape the template in position. Verify that the template is level and properly aligned before marking.
- Using a pencil or scribe, mark all hole locations by pressing through the template at each indicated point. Mark both the door holes (for the closer body) and the frame holes (for the arm bracket or shoe).
- Remove the template and verify that all marks are visible and in the correct positions.
Step 3: Drill Mounting Holes
Using the drill bit sizes specified on the template, drill all marked holes. Templates typically call for two different bit sizes: a smaller pilot hole for sheet metal screws and a larger through-hole for sex bolts or machine screws.
- For the closer body (door face): Drill through the door using the larger bit size specified on the template. These holes will receive sex bolts that pass completely through the door.
- For the arm bracket or shoe (frame): Drill pilot holes using the smaller bit size. These holes typically receive sheet metal screws or lag screws into the frame.
On hollow metal doors, drill carefully to avoid deforming the door face. Use moderate drill speed and steady pressure. On wood doors, pre-drill to prevent splitting at the top rail.
Step 4: Mount the Closer Body
The closer body is the heavy hydraulic unit that generates the closing force. Mount it on the door face (for regular arm and parallel arm configurations) or on the frame head (for top jamb configuration).
- Hold the closer body against the door face with the mounting holes aligned. For regular arm mounting, the closer body is on the pull side. For parallel arm mounting, the closer body is on the push side.
- Insert the sex bolts from the opposite side of the door. Thread the machine screws through the closer body and into the sex bolts.
- Tighten all fasteners evenly. Do not fully tighten one fastener before starting the others. Snug each fastener in a cross pattern, then make a final pass to full torque.
- For top jamb mounting, the closer body is attached to the frame head using screws into the frame. Verify that the frame can support the weight and torque of the closer.
Apply thread-locking compound to fasteners if specified by the closer manufacturer or if the door is subject to heavy traffic and vibration.
Step 5: Attach the Arm Assembly
The arm connects the closer body to the frame (or to the door, in top jamb mounting). Most commercial closers use a two-piece arm: a main arm that attaches to the closer body shaft and a forearm that connects to the frame bracket.
- Install the frame bracket (shoe) on the frame using the pre-drilled holes. Secure with the provided sheet metal screws or through-bolts.
- Attach the main arm to the closer body’s output shaft. The arm typically slides onto a splined or keyed shaft and is secured with a set screw or nut.
- Connect the forearm to the main arm. Most arms have a knuckle joint that allows adjustment of the arm length. Set the arm length so that the forearm is perpendicular to the door face when the door is closed (for regular arm mounting) or so that the arm lies flat and parallel to the door face when closed (for parallel arm mounting).
- Tighten all set screws and connection hardware. Verify that the arm moves freely through the full range of door travel.
Step 6: Adjust Closing Speed Valves
The closer body contains hydraulic valves that control how fast the door closes. Most commercial closers have three independently adjustable valves: sweep (general closing speed), latch (final closing speed), and backcheck (resistance to opening). Some closers also include a delayed action valve. The valve adjustment screws are located on the end or face of the closer body and are turned with a flat-blade screwdriver.
The following table describes each valve and its function. Adjust valves in the order listed, as changes to one valve can affect the behavior of the others.
Sweep Speed | Controls the door closing speed from approximately 90 degrees open to about 15 degrees from closed. Adjust so the door takes 5 to 8 seconds to travel through this range. |
Latch Speed | Controls the final 10 to 15 degrees of closing. Must be fast enough to compress the latch bolt into the strike plate and achieve positive latching. Typical setting is slightly faster than sweep speed. |
Backcheck | Provides resistance when the door is opened past approximately 60 to 70 degrees. Prevents the door from being thrown open into walls or adjacent objects. Adjust to provide firm resistance without preventing the door from opening fully. |
Delayed Action (if equipped) | Holds the door open for a set period (typically 10 to 60 seconds) before the sweep cycle begins. Used in high-traffic areas or where ADA accessibility requires a delayed closing action. |
Turn valve adjustment screws clockwise to slow the closing speed and counterclockwise to increase speed. Make adjustments in small increments (one-eighth to one-quarter turn at a time). Over-turning a valve screw can cause it to back out of the closer body and release hydraulic fluid, which will permanently damage the closer.
After adjusting all valves, test the door through at least five full open-close cycles to verify consistent performance. The door should close smoothly, latch positively, and not slam.
Step 7: Adjust Spring Tension
The spring inside the closer body determines the force required to open the door and the force available to close it. Most commercial closers allow spring tension adjustment through a dedicated tension adjustment screw or by repositioning the arm on the closer body shaft.
For ADA-compliant interior doors, the spring tension must be set so that the opening force at the latch edge does not exceed 5 pounds-force (5 lbf). Use a push-pull gauge at the latch edge to measure the opening force. Reduce spring tension until the door meets the 5 lbf requirement while still latching positively.
If reducing spring tension causes the door to fail to latch, check for other sources of resistance: misaligned strike plate, worn latch bolt, excessive weatherstripping compression, or an out-of-plumb frame. Correcting these issues can allow lower spring tension while maintaining positive latching.
Step 8: Final Checks and Testing
Before completing the installation, verify the following.
- Door closes completely and latches positively from a fully open position.
- Door does not slam. Closing speed is smooth and controlled through both the sweep and latch zones.
- Backcheck engages firmly when the door is pushed open aggressively.
- Opening force does not exceed 5 lbf at the latch edge (for ADA-compliant interior doors).
- All fasteners are tight. Check sex bolts, machine screws, bracket screws, and arm set screws.
- Closer body is level and flush against the door face.
- Arm operates through full range of motion without binding or interference.
If the door is fire-rated, verify that the closer is listed for the assembly’s fire rating and that no modifications have been made to the closer, arm, or mounting that would void the fire rating.
Fire-Rated Assembly Requirements
When a door closer is part of a fire-rated assembly, every component—door, frame, closer, arm, and all hardware—must be listed and labeled for the required fire rating. Fire-rated door assemblies are tested and listed under UL 10C (positive-pressure fire test) and NFPA 80 (Standard for Fire Doors and Other Opening Protectives). The table below summarizes the five standard fire-rating levels for commercial door assemblies.
20-Minute | Corridor and room separation in sprinklered buildings. Common in office partitions and residential corridor doors. |
45-Minute | Corridor doors and room separations where a higher rating is required. Common in educational and healthcare occupancies. |
60-Minute (1-Hour) | Stairwell enclosures, exit corridors, and shaft enclosures in some building types. |
90-Minute (1.5-Hour) | Stairwell enclosures, exit passageways, and fire barriers. Required for 2-hour rated walls per NFPA 80. |
180-Minute (3-Hour) | Fire walls separating buildings or high-hazard areas. Requires the heaviest-duty closers and frames. |
For fire-rated assemblies, the door closer must be UL listed or approved by an equivalent testing laboratory for the specific rating level. The closer must be capable of closing and latching the door from any open position. Self-closing is mandatory on all fire-rated doors; hold-open devices are only permitted when connected to a fire alarm system that releases the door upon alarm activation.
CDF Distributors labels all fire-rated door assemblies before shipping. Each assembly includes matching fire labels on the door, frame, and hardware. Verify all labels and listings with the Authority Having Jurisdiction (AHJ) before installation.
Common Door Closer Installation Mistakes
Avoid these common errors during door closer installation:
- Drilling without the template. Freehand drilling results in misaligned holes that prevent the closer from mounting flush and can weaken the door.
- Selecting the wrong mounting configuration. Using a regular arm template when a parallel arm is specified places the closer on the wrong side of the door.
- Over-adjusting hydraulic valves. Turning valve screws more than two full turns from factory settings can cause the valve screw to back out and release hydraulic fluid, permanently damaging the closer.
- Incorrect arm length. If the forearm is not perpendicular to the door face when closed (regular arm) or parallel to the door face (parallel arm), closing performance will be inconsistent.
- Ignoring spring tension for ADA compliance. The closer may latch the door but exceed the 5 lbf maximum opening force required for interior doors on accessible routes.
- Using the wrong fasteners. Substituting wood screws for sex bolts on hollow metal doors, or using undersized screws in the frame bracket, can result in the closer pulling loose under repeated use.
- Not testing through full range. A closer that appears to work with a gentle push may fail to latch when the door is released from a fully open position.
Industry Standards Referenced
- ANSI/BHMA A156.4: Door Closers (closer sizing and performance requirements)
- ADA Standards for Accessible Design, Section 404.2.9: Door opening force (5 lbf maximum for interior doors)
- ICC/ANSI A117.1: Accessible and Usable Buildings and Facilities
- UL 10C: Positive Pressure Fire Tests of Door Assemblies
- NFPA 80: Standard for Fire Doors and Other Opening Protectives
- Fire-rated assemblies: 20-minute, 45-minute, 60-minute (1-hour), 90-minute (1.5-hour), and 180-minute (3-hour) rating levels per UL/NFPA standards
Configure Your Door Closer Assembly
CDF’s ProBuilder tool allows contractors and facility managers to configure complete door assemblies online, including door closer selection matched to door size, weight, and fire rating. During configuration in ProBuilder, closer type and mounting configuration are structured as part of the complete hardware set. 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.
Frequently Asked Questions
What size door closer do I need for a standard commercial door?
Most standard commercial interior doors (36” wide, up to 150 lbs) require a size 3 or size 4 closer. Exterior doors and heavier assemblies may require size 5 or size 6. Closer sizing follows ANSI/BHMA A156.4 standards and is determined by door width, weight, and exposure to wind loading. CDF’s ProBuilder recommends the correct closer size based on your door specifications.
What is the difference between regular arm and parallel arm mounting?
In regular arm mounting, the closer body is on the pull (hinge) side of the door and the arm extends toward the frame. In parallel arm mounting, the closer body is on the push (stop) side and the arm runs parallel to the door surface. Regular arm provides higher closing efficiency. Parallel arm is specified when the closer must be on the push side or for storefront doors.
What is the maximum opening force allowed by ADA for interior doors?
The ADA and ICC/ANSI A117.1 require a maximum opening force of 5 pounds-force (5 lbf) measured at the latch edge for interior doors on accessible routes. Fire-rated doors may be exempt from this limit when the fire rating requires higher closing force, but the closer should still be adjusted to the minimum force necessary for positive latching.
How do I adjust the closing speed on a door closer?
Locate the hydraulic valve adjustment screws on the end or face of the closer body. Use a flat-blade screwdriver to turn the screws in small increments (one-eighth to one-quarter turn). Clockwise slows the speed; counterclockwise increases it. Adjust sweep speed first, then latch speed, then backcheck. Do not over-turn the screws, as this can release hydraulic fluid.
Can a door closer be used on a fire-rated door?
Yes, but the closer must be UL listed or equivalent for the specific fire rating of the assembly. Fire-rated doors require self-closing hardware. All components—door, frame, closer, and hardware—must carry matching fire labels for the required rating: 20-minute, 45-minute, 60-minute, 90-minute, or 180-minute (3-hour). Hold-open devices are only permitted when connected to a fire alarm release system. CDF ships all fire-rated assemblies with matching labels.
What does the backcheck valve do on a door closer?
The backcheck valve provides hydraulic resistance when the door is opened past approximately 60 to 70 degrees. This prevents the door from being thrown open forcefully into walls, adjacent furniture, or people on the other side. Backcheck protects the door, frame, closer, and surrounding surfaces from damage. Adjust the backcheck valve to provide firm resistance without preventing the door from opening fully.
Do I have to use the manufacturer’s template to install a door closer?
Yes. The drilling template provided with the closer is a full-scale pattern that shows exact hole locations for each mounting configuration. Drilling without the template will almost certainly result in misaligned holes. Misaligned holes prevent the closer from sitting flush, compromise the arm geometry, and can void the manufacturer’s warranty. Always use the template.
How often should a commercial door closer be inspected and adjusted?
NFPA 80 requires annual inspection of all fire-rated door assemblies, including the closer. For non-fire-rated doors, inspect closers at least once per year. Check for oil leaks around the closer body, loose fasteners, arm wear at the knuckle joint, and proper closing and latching. Readjust valve settings and spring tension as needed. Replace closers that show signs of hydraulic fluid leakage, as leaking closers cannot be repaired in the field.
About This Guide
This installation procedure reflects CDF Distributors’ standard specifications and field-tested installation method used by commercial contractors nationwide. The procedures described are consistent with ANSI/BHMA A156.4, ADA accessibility standards, and NFPA 80 requirements for fire-rated assemblies.
For questions about door closer installation or to order a complete door assembly, contact CDF at (855) 769-9895 or sales@cdfdoors.com. Configure your assembly online at cdfdistributors.com using ProBuilder.
