Calder Door offers a extended product line of unique products that are related to the door, partition, and specialty division that we classify as special application products. This grouping of products includes access panels, accordion doors and partitions, folding gates and wire partitions, and lockers and storage units. Calder Door is always looking for further opportunities to serve our customers with quality products and services. While we are able to do special applications on several products throughout our website, these products are not always easy to find. We encourage our customers to call us if there is a product related to our current product line that is not listed on our website. Finding solutions for our customers is a top priority.

Special Application Products

1Access Panels Roof Hatches
Access Panels and Roof Hatches

Access doors, commonly called access panels, are designed to grant access to a small space such as ducts, controls, or small spaces. Calder Door offers a variety of access panels for different wall types and needs. Calder Door also offers roof hatches for access to a roof through a ladder or staircase. Call Calder Door today to discover which access panel may be right for your building. Our access panels can be installed in a variety of wall types including plaster, acoustical tile, ducts, and exterior surfaces. Some options are fire resistant for safety purposes.
AP Series - Acoustical Plaster Access Doors 	  Doors are designed to install flush with the plaster surface assuring an attractive finish. Doors are recessed 5/8: and lined with a metal lath to allow plaster of surrounding surfaces to fill in the face of the door. Door and Frame are fabricated from 16 gage, galvannealed steel with a prime coat finish. Frame has a 3
AP Series - Acoustical Plaster Access Doors

Doors are designed to install flush with the plaster surface assuring an attractive finish. Doors are recessed 5/8: and lined with a metal lath to allow plaster of surrounding surfaces to fill in the face of the door. Door and Frame are fabricated from 16 gage, galvannealed steel with a prime coat finish. Frame has a 3" wide metal lath on all four sides to key into the plaster. Concealed Hinge is recessed and operates completely out of sight so that only the metal thickness of the door and frame is visible. Latch is screwdriver operated. Finish is a prime coat suitable for painting.
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AP Series - Acoustical Tile Access Doors

Doors are designed for use with acoustical tile or gypsum board walls and ceilings. The door is engineered to install flush, virtually concealed. Door is recessed 5/8" to accept acoustical tile or gypsum board. Door frame is 16 gage and is 12 gage, galvannealed steel with a prime coat finish. Concealed Hinge operates completely out of sight so that only the metal thickness of the door and frame is visible. Latch is screwdriver operated.
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CFR Series - Ceiling Fire Resistant Access Doors

Doors are designed for use in a suspended dry wall ceiling as part of a fire rated ceiling assembly. The CFR Series door, itself, is not fire rated. However, the combination of steel and fire rated tile maintains the fire resistant quality of the ceiling assembly. Door is recessed 1-1/2" to accommodate dual layered ceiling tile. Door is fabricated from 16 gage, galvannealed steel with a prime coat finish. Frame is fabricated from 18 gage, galvannelaed steel with a prime coat finish. Hinge is a continuous piano type. Latch is screwdriver operated.
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DT Series - Duct Access Doors

Doors are designed to provide access to equipment installed within ducts. The door panels are insulated and gaskets between the panel and frame will assure tight seals without obstruction in the air system. Door and Frame are fabricated from 24 gage, galvanized steel. Door is 1" thick, double wall construction and insulated. Frame is provided with knock-over tabs and easily attached to the duct. Hinge is continuous piano type. Cam Latch is self-tightening and hand operated.
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DW Series - Dry Wall Access Doors

Doors are ideally suited for new installations or for remodeling, in masonry, tile, wood or other wall and ceiling surfaces. Door features rounded safety corners. Door and Frame are fabricated from 16 gage, galvannealed steel with a prime coat finish. Frame is one piece construction, 1" wide and provides perfect concealment of the rough wall opening. Wall frame is provided with 1/4" mounting holes for fastening within the furred spaces allowing faster installation and fixing maximum clearance. Concealed Pivoting Rod Hinge prevents distortion and closes door squarely. Doors 24" or larger are provided with a continuous piano hinge. Latch is screwdriver operated. Finish is a prime coat suitable for painting.
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DWB Series 14 Gauge - Dry Wall Access Doors

Doors are ideally suited for new installations or for remodeling, in masonry, tile, wood or other wall and ceiling surfaces. Door features rounded safety corners. Door and Frame are fabricated from 14 gage, galvannealed steel with a prime coat finish. Frame is one piece construction, 1" wide and provides perfect concealment of the rough wall opening. Wall frame is provided with 1/4" mounting holes for fastening within the furred spaces allowing faster installation and fixing maximum clearance. Hinge is a concealed continuous piano hinge. Latch is screwdriver operated. Finish is a prime coat suitable for painting.
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DWB Series - Dry Wall Bead Access Doors

Doors are designed for flush installation in dry wall surfaces. Door features a concealed hinge that prevents distortion and closes door squarely. Door and Frame are fabricated from 16 gage, galvannealed steel with a prime coat finish. Frame has 1/4" mounting holes positioned to allow anchoring directly to studs to assure a secure mounting. A drywall bead on the frame allows the drywall joint compound to be applied over the bead at the same time as the joints and corners. Flange has pre-punched holes to provide grip for the joint compound and facilitate fastening the flange to framing members with drywall screws. Concealed Pivoting Rod Hinge prevents distortion and closes door squarely. Doors 24" or larger are provided with a continuous piano hinge. Latch is screwdriver operated. Finish is a prime coat suitable for painting.
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ED Series - Exterior Access Doors

Elmdor Exterior Access Doors are manufactured and engineered to provide access to exterior applications ensuring years of protection against outdoor elements. Our new technology helps to manifest resistance to water and vapor. Our Exterior Door includes foam insulation and neoprene gasket on four sides. Door is fabricated from 16 gauge, galvannealed steel with a prime coat finish and 1" thick rigid foam insulation. Frame is fabricated from 16 gauge, galvannealed steel with a prime coat finish and provided with masonry anchors and bolt holes. Hinge is concealed and operates completely out of sight, so that only the door and frame are visible. Exterior Hatch is a cylinder lock that features a knurled knob or key operation. Finish is a prime coat suitable for painting.
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Elmdor (Metal Lath) ML Series - Metal Lath Access Door

Doors are designed specifically to meet the needs of plaster construction. Door has a 3" wide metal lath on all four sides for keying into plaster. Door and Frame are fabricated from 16 gage, galvannealed steel. Concealed Pivoting Rod Hinge prevents distortion and closes door squarely. Doors 24" or larger are provided with a continuous piano hinge. Latch is screwdriver operated. Finish is a prime coat suitable for painting.
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Elmdor (Plaster Wall) PW Series - Plaster Wall Access Door

Doors are designed specifically to meet the needs of plaster construction. Door has 3/4" plaster ground for plaster finish. Door and Frame are fabricated from 16 gauge, galvannealed steel with a prime coat finish. Frame has 1/4" mounting holes to facilitate installation. Concealed Pivoting Rod Hinge prevents distortion and closes door squarely. Latch is screwdriver operated. Finish is prime coat suitable for painting.
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Fire Rated FR Series - Fire Rated Wall Access Door

Access Doors are Fire Rated by Underwriters Laboratories Inc., For 1-1/2 hours, "B" Label, and meet ANSI-UL 10B standard. Door has a heavy duty spring closer to assure positive latching when panel closes. This door is for wall installation only. Door and Frame are fabricated from 16 gauge, galvannealed steel with a prime coat finish. Door has a heavy duty spring to assure positive latching. Frame is equipped with both masonry anchors and bolt holes to facilitate installation in all types of wall construction. Concealed Hinge operates completely out of sight so that only the door and frame is visible. Exterior Latch is recessed and is operated using a ring attached to the sliding bolt. Interior Latch Release Slide is included enabling door to be opened from the inside. Finish is a prime coat suitable for painting.
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FRC Series - Fire Rated Ceiling Access Door

Fire rated Access Doors are rated by Underwriters Laboratories for 1.5 hours, "B" label in walls and by Warnock Hersey for 3 hours in ceilings and 2 hours in walls. The FRC Series Doors should be utilized when providing access in fire rated walls and ceilings. FRC Series Doors have heavy-duty spring closures to ensure positive latching when panel closes. An interior latch release is also included on all doors to enable unlocking from inside. Door is fabricated from 20 gauge, galvannealed steel with a prime coat finish. Door panel is provided with two inches of insulation in a sandwich type construction. Frame is fabricated from16 gage, galvannealed steel with a prime coat finish and provided with masonry anchors and bolt holes. Hinge is a fully concealed continuous piano type and mounted on the long side of the rectangular door panel. Exterior Latch is a dual purpose lock that features a knurled knob and key operation. Both are provided at time of shipping. Interior Latch Release Slide is included enabling door to be opened from the inside.
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Roof Hatch - Roof Access Hatch Roof

Access Hatches are designed to provide convenient, cost saving access to the roofs of buildings, allowing for ladders and stair access to the roof from the interior of the building. Elmdor Roof Access Hatches are designed and engineered for durability and safety, with ease of installation. The Roof Access Hatches install easily over the roof opening and are secured from the base flange to the roof. Curb construction shall be 14 gage (G90) galvanized steel with durable recoatable gray primer finish. It shall be 12" in height with a 3-1/2" wide mounting flange with mounting holes for roof attachment. Cover is 14 gage (G90) galvanized steel with radius corners for safety and shall be fully welded at the corners for watertight construction. Latching shall include interior handle, exterior handle and provisions for a padlock, both inside and out. Hardware shall include an automatic, hold-open arm with vinyl grip and compression springs encased in telescopic tubes for smooth door operation.
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8009 Series - Flush Valve Panel and Frame

Wall Panel and Frame are designed for back supply toilets and urinals where the flush valve is built into the wall. This panel allows easy access to service the flush valve by maintenance personnel. Additionally the panel provides protection to the flush valve from vandalism. Wall Panel is heavy gage, type 304, stainless steel with exterior surface polished to a satin finish. It is provided with a 1-3/4" diameter hole for the flush valve pushbutton. Panel is secured to the frame with four 1/4" - 20 x 1-1/4" tamper resistant, stainless steel screws. Frame is 16 gage jetcoat steel with a prime coat. Frame is provided with mounting holes for fastening within the furred spaces.
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S010 Series - Flush Valve Panel and Frame

Wall Panel and Frame are designed for back supply toilets and urinals where the flush valve is built into the wall. This panel allows easy access to service the flush valve by maintenance personnel. Additionally the panel provides protection to the flush valve from vandalism. Wall Panel is heavy gage, type 304, stainless steel with exterior surface polished to a satin finish. It is provided with a 1-3/4" diameter hole for the flush valve pushbutton. Panel is secured to the frame with four 1/4" - 20 x 1-1/4" tamper resistant, stainless steel screws. Frame is 16 gage jetcoat steel with a prime coat. Frame is provided with mounting holes for fastening within the furred spaces.
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SF Series - Surface Access Door

Doors are designed for surface installation on drywall, masonry or thin-coat plaster. Door features rounded safety corners and is attached to the frame with a continuous piano hinge allowing a 175mm opening. Door and Frame are fabricated from 14 gage, galvannealed steel. Frame is easily secured to the studs and anchored through pre-drilled holes in each corner. No additional reinforcement is required. Latch is screwdriver operated. Finish is a prime coat suitable for painting.
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SLA Series - Slammer Access Door

Doors are designed to provide security access with the strength and durability to withstand abusive and vandal-prone conditions prevalent in many institutions. Without sacrificing security, these doors allow maintenance personnel access to plumbing chases, shut-off valves and electrical apparatus located behind finished walls. Door is fabricated from 10 gage steel. Frame is 3/16" x2" x2" angle steel, welded and with prepunched mounting holes. Latch detention type dead bolt lock with paracentric key . Door is provided with a high security, vandal resistant, detention type lock. Doors can be manufactured with locks provided by others. Hinges are heavy duty and are welded to the door and frame. Finish is a prime coat suitable for painting.
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SLK Series - Shul-Loc Access Doors

Access Doors are designed for drywall, masonry or concrete construction and provide the security required in todays’ schools, hospitals, hotels, and correctional institutions. Door and Frame are fabricated from 14 gage, galvannealed steel and the door is provided with a 16 gage vertical reinforcement channel. Lock is an automatic springbolt type featuring a precision mechanism. When the door is closed in the locked position, the uniquely designed angled cam lock automatically engages. The key can only be removed when the lock is in the locked position. Hinge is a concealed type. Doors 24" or larger are supplied with a continuous piano hinge. Finish is a prime coat suitable for painting.
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VB Series - Value Box

Valve boxes are engineered to provide access to all types of valves and controls which are concealed in the wall. Elmdor Valve Boxes are fully enclosed and features rounded safety corners. Door and Frame shall be 16 gage galvannealed steel with a prime coat finish. Frame is a one piece construction 1" wide and produces perfect concealment of the rough wall openings. Wall frame is provided with 1/4" mounting holes for fastening within the furred spaces allowing faster installation and giving maximum clearance. Hinge is a concealed continuous piano hinge. Latch is screwdriver operated. Finish is a prime coat suitable for painting.
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VSR Series - Weather Strip Removable Access Door

Weather Strip Removable Access Doors are designed with flush gaskets between the panel and frame to ensure flush air seal in all types of walls and ceilings. Note: Door has NOT been tested for air tightness. Door and Frame shall be 16 gage galvannealed steel with a prime coat finish. Frame is a one piece construction 1" wide and produces perfect concealment of the rough wall openings. Wall frame is provided with 1/4" mounting holes for fastening within the furred spaces allowing faster installation and giving maximum clearance. Door is fully removable and held in place by multiple latches. Latch is a screwdriver operated. Finish is a prime coat suitable for painting.
2Accordion Doors
3Folding Gates Wire Partitions
Folding Gates - Wire Mesh Partitions

Folding Gates and Wire Partitions are designed to offer security while maintaining ventilation and visibility in garage door openings, entrance doors, store front windows, storage areas, or hallways. Calder Door offers a wide range of folding gates and wire partitions that include dock door security applications, retail store security gates, school partitions, wire mesh partitions, and access control gate applications. If security and access control are a concern for your business or facility, we encourage you to consider one of Calder Door’s many Folding gate and wire partition products.
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Folding Gates - Dock door Security Applications

Pair Dock Door Security Gates


Secure dock and receiving doors, doorways, garage and service doors, hallways and entranceways without sacrificing visibility or air circulation. For narrow openings, use a Single Gate.
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Single Dock Door Security Gates

Secure dock and receiving doors, doorways, garage and service doors, hallways and entranceways up to 12 feet wide without sacrificing visibility or air circulation. For larger openings, use a Pair Gate.
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Door Security Gates

Ideal for providing access control and security for entryways up to 4 feet wide. Door Security Gates from Illinois Engineered Products are perfect for securing high-traffic hallways or entryways in any type of business or industry.
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Folding Gates - Retail Store Security Gates

Top Track Store Security Gates


Engineered to allow the gate to be hung much like a curtain across any storefront length or span.

Top Track Gates will always remain within the track.

Recommended for retail store fronts with openings over 20 feet wide, these gates can be used to secure several hundred feet.
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Bottom Track Store Security Gates

Designed to provide a more stable and secure gate installation along the inside of store front windows, these gates utilize a continuous frame for structural strength and stability.

Security gates using a bottom track design can be made to pivot out of the opening and to swing flat remaining virtually invisible while not in use — customers will never know they are there
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Pair Store Security Gates

Both Top Track and Bottom Track Security Gates can be locked together as a pair in multiple spots along tghe entire span of a store front opening.
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Xtra-duty Retail Store Security Gates

The strongest, most secure retail store security gate you can buy — these gates have twice the steel as our standard heavy duty gates.

The Xtra-duty Retail Store Security Gate is designed on a continuous frame on all sides including top and bottom tracks, and utilizes vertical bars that do not lose height when opening.
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Folding Gates - Retail Store Security Gates

School Gates

ACORN’s Bostwick Series 5743, 5761 and 5762 Fixed Security Folding Gates for school applications can control corridor traffic for regular school activities. Offered in both single- and double-gate configurations, these units feature the benefit of folding top and folding bottom tracks that, when expanded, create a sturdy blockade from unwanted access. They can limit main traffic flow, especially during after-school sporting events and other activities.

Fixed gates also have the option of deep or shallow cabinet storage for new buildings, or surface-mounting for both new and retrofit applications.

Also for use in entryways, these gates offer another layer of break-in defense to locked school doors. All of ACORN’s fixed security folding gates can be locked into place in both the stacked and extended positions for greater security control.
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Wire Mesh Partitions

Standard ACORN Wire and Iron Works is also a national leader in manufacturing wire mesh partitions. Designed to prohibit foot traffic, these tough partitions are available with the strength of 10-gauge wire, providing security and protection from break-ins and vandalism for many environments. ACORN’s wire mesh product line includes both standard and custom panels, doors, service windows and corners designed to simplify partition arrangement in a variety of applications. Key uses include school equipment lockers, co-location facilities and multi-family building storage areas. Manufactured from 100% carbon-neutral, recycled steel, the product also qualifies for LEED points Wire Mesh Partitions - Heavy Duty Designed to prevent the most extreme threats and ensure maximum security, these extra-tough wire mesh partitions by ACORN Wire and Iron Works are available with the strength of 6-gauge wire, providing greater security and protection in the most demanding environments. ACORN’s wire mesh product line includes both standard and custom panels, doors, service windows and corners designed to simplify partition arrangement in a variety of applications. Key uses include lockdown areas, conveyorized sorting stations, postal distribution centers, bonded warehouses and court buildings, as well as homeland security purposes. Manufactured from 100% carbon-neutral, recycled steel, the product also qualifies for LEED points.
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Folding Gates - Access Control Gate Applications

Steel Aisle Gate


Steel Aisle Gates are lightweight to move from setting to setting with little effort and are designed for use in retail stock inventory operations, maintenance procedures, or any type of temporary crowd control.
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Portable Scissor Gate

Portable Scissor Gates can be used virtually anywhere and any way you need them including sealing school hallways, closing elevator banks, restricting access in offices, factories or warehouses. Portable Scissor Gates extend up to 12' and are a quick and easy way to seal off any area and are perfect for providing temporary access control in any area.
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Xtra-duty Portable Bostwick Gate

For portable security needs, this new portable Bostwick gate provides the kind of flexibility which exceeds normal location requirements. The Xtra-duty portable Bostwick gate models are designed for use as traffic control units in schools, park district facilities, churches and community centers. Gate comes in standard wall mount, floor mount and pressure fit configurations.
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Barrier Gate Barrier

Gates from Illinois Engineered Products allow quick and easy portable access control. They're galvanized steel and powder coated in yellow and black safety colors for high visibility. Barrier Gates are ideal for providing temporary access control in any kind of area — including entryways, hallways or aisles.
4Lockers

Calder Door

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