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Impossible Doors Our Specialty

If you would like to know more about how to design a door with Sing Core inside, click here.

When it comes to building the most unique doors, especially large, oversized doors of any size (up to 20 x 60 ft. or more), type, or style of door, Sing Core’s True Flat Team knows how to bridge the gap between impossible and possible, by applying many variations of their patented and patent-pending technologies to make it happen. Some of our most recent projects include curved doors, Sing stile and rail doors, new patent pending Sing Core stile and rails, long-span wood stave planks, CNC door carving blanks, large sliders with man doors, billionaire home doors, and hot rolled steel doors.

When an architect’s visionary project is coming to life, it is common for the project to come to a halt when the main door (this inspired visual centerpiece of the project) presents problems for the millwork or door company in charge of the rest of the door schedule.

Oftentimes, the most common response is, “We will build it, or have it built, to your specifications, but this door will be placed on a separate rider, excluding it from any other warranty that may be covering the remainder of the door schedule.”

The door company will probably not even bother with the manufacturing of this piece, as it is too costly to re-tool to build it and it is likely to fail not long after installation. So, they will sub it out, and have an artisan millwork build it, freeing them from any responsibility for follow up maintenance calls regarding this piece of the job.

That is, unless they are working directly with Sing Core.

Many of the biggest door companies and high-end millworks are back into the specialty door business because they have partnered with Sing Core.

Why Sing Core?

Sing Core offers solutions that make impossible doors possible, and not only possible, but these magnificent works of art can be guaranteed not to fail, as they are covered by Sing’s

50-Year No Fail Guarantee

These enormous or one-of-a-kind unique doors are nothing short of amazing, with unparalleled service records and longevity, and they are guaranteed not to warp, bend, twist, cup or otherwise fail (including full structure and lamination warranty) for 50-years. No other door in the world comes with such an impressive guarantee unless it has Sing Core inside.

The Most Unique and Challenging Doors

Large doors are not the only unique and challenging doors to come to the attention of the True Flat Team. Many other types of architectural doors will present a huge list of problems that will send door engineers, designers, and custom door makers running for cover, yet they are no problem for the Sing Core factory teaming up with the sophisticated door manufacturer or millwork to accomplish. Like these:

Curved Doors

Curved doors are unique specialty doors, that require precise curvatures, especially if they are being newly installed in a pre-existing wall or structure that is curved. Matching the curvature of the door to the existing wall can be extremely difficult, but the True Flat Team at Sing Core make the perfect curved door to match any curved wall or structure, while still guaranteeing the door for 50 years to perform without warp.

Sing Stile and Rail Doors

The Sing-style of stile and rail door is a departure from traditional stile and rail door technology. The clients who prefer the Sing-style stile and rail door are looking for characteristics that are unavailable via traditional door building methods but still retain the look and feel of a traditional stile and rail door. Specifically, they are looking for a stile and rail door that is impact resistant, insulated for both sound deadening and climate control, and of course guaranteed for 50 years. Sing Core accomplishes this by building the stile and rail face on top of a patented warp-free core.

 

Large Thin Stile and Rail Framed Doors

Sometimes the architectural door specifications are unusual, like this wood-framed traditional stile and rail door with a large glass lite opening. This is a 14 foot tall door that calls for only a three-inch wood stile and rail surround to hold the glass. This is unusual and would be hard to accomplish with standard door building methods, and it was even a challenge for the True Flat Team, which led to their creating a new type of stiffener, which is now patent-pending technology. Now, standard stile and rail doors made with Sing Core stiles and rails can be guaranteed to remain warp-free for 50 years using new patent pending Sing Core stile and rails.

20-ft Span Wood Stave Garage Door

This is just one example to the many kinds of garage doors that Sing Core has helped to make possible. In this case, the architect insisted on 20-ft spanning warp-free wood stave planks, that any other way would have been impossible. 50 years from now, will be just as straight and true as freshly installed thanks to Sing Core and their long-span wood stave planks.

CNC Carved Doors

These beautifully CNC carved doors would be impossible to keep straight as they are accentuating the wood’s natural grain which is already trouble brewing, if not for the warp-free Sing Core working hard behind the scenes, deep inside to keep these doors perfectly and truly flat even though they are 107-inches tall using Sing CNC door carving blanks.

 

Large Sliding Doors with Man Doors

When it comes to large sliding doors with man doors, there is really only one way to do it with a high degree of precision. The large sliders with man doors must remain decidedly straight and true in order for the man door to operate seamlessly, plus, because there is Sing Core inside, you get the added benefit(s) of getting lightweight, high strength, fully insulated for sound and climate control, and our 50-year warp-free guarantee.

 

Billionaire’s Exotic Home Doors

These massive natural teak doors have Sing Core inside to keep them from warping and also to provide added protection from outside interferences to privacy and the elements. Not everyone can have their whole homes fitted with Sing’s doors, but what a great feeling it is having done so with Sing’s billionaire home doors.

 

Hot Rolled Steel Doors

Hot rolled steel doors can be a challenge, especially if they are very large. Normally, large hot rolled steel means a lot of weight needs to be articulated adding stress and strain to the frame, hardware, and structure if used very often. Patented and patent-pending Sing Core reduces the weight greatly while enhancing the door’s characteristics enabling one to install a man door or open and close a mammoth-sized hot rolled steel door easily.

 

When Bigger is Better

Thanks to the patented and patent-pending technologies in the hands of the True Flat Team at Sing Core bigger does not necessarily have to mean heavier or big troubles are ahead. With Sing Core inside your big doors can be lightweight, high strength, fully insulated, and guaranteed warp-free for 50 years.

If you would like to know more about how to design a door with Sing Core inside, click here.

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Hot Rolled Steel Doors

Large hot rolled steel panels being finished for installation in winery

Hot rolled steel panels high precision

Sing Core brings an Eco-friendly approach to working with large spans of hot rolled steel with less weight and more strength than plain steel pound for pound, revolutionizing the steel fabrication process. In fact, we are best known for our large hot rolled steel metal doors and hot rolled steel wall panels.

Our patented rolled steel panels feature custom metal fabrication uses high grade formaldehyde free adhesives instead of the more destructive welding process and your Sing Hot Rolled Steel Panel can host an exterior hot rolled sheet metal thickness of 16 gauge or more.

Sing hot rolled steel takes metal working into a whole new arena that is being embraced by steel companies making huge hot rolled steel products without having to use heavy steel framing.

These lightweight high strength hot rolled steel accordion doors (see video above) are 10 ft tall, each door panel is 3 ft wide and (brace yourself) only 3/4 inch thick… high precision and perfectly straight! (Try that with anything else… Only possible with patented Sing Core.)

Hot rolled steel accordian door panels quote request form example

Click for order example

One of the primary functions of Sing hot rolled steel products is in the area of commercial steel entry doors. If you are new to metal manufacturing, you will find that raw hot rolled steel has a more primitive or industrial feel to it, it has a less smooth surface than cold rolled steel and requires finishing to avoid rust or oxidation. The unique appearance of hot rolled steel panels appeals to designers, architects, museums, art galleries and often used in steel wall art.

Sing metal wall panels lightweight stronger than steel pound for poundEspecially if you’re considering utilizing hot rolled steel for your large doors, Sing Core can help to mitigate the damages caused by the heavy weight of hot rolled steel doors with interior steel frames that require welding. This allows you to build hot rolled steel doors of immense size that are high precision, just like other types of Sing metal.

The Sing Core material is extremely high precision (within +/- .006 inch) which keeps your hot rolled steel door straight and flat regardless of its size. The advantages of the straighter and truer big metal doors come in handy when you multiply the door’s required integrity by two when dealing with steel double doors. Double steel doors, especially if they are large and oversized, are fraught with additional challenges.

Sing hot rolled steel can be used for upscale industrial steel doors and in commercial metal door replacements for increased performance and high precision which also supply the project with built in insulation and sound deadening qualities.

Galvanized steel modular wall panel 20 ft x 5 ft x 1 inch strength demonstration

20 ft x 5 ft x 1 inch strength demonstration

Our hot roll steel solutions are changing the scope of architectural metal fabrication because the nature of hot rolled steel is predominantly restrictive due to the weight and framing required to support the raw material. Having access to a lightweight, high strength alternative, like Sing Hot Rolled Steel Panels, opens doors to unencumbered creativity.

Sing Core’s hot rolled steel doors are just some of the best doors that are among the many types of doors that have put us on the map as the best door featured in the most high end jobs across the country and the world.

You will find Sing hot rolled steel panels used not only as a standard swing door but also as hot rolled steel flooring, hot rolled steel counter tops, hot rolled steel wall panels and room dividers, hot rolled steel pivot doors and hot rolled steel sliding doors.

Let Sing hot rolled steel set your creativity free. See also: Steel Fabrication

Click here for hot rolled steel prices.

20 ft steel door steel metal building

21 ft. tall Sing Steel Pivot Door (right on building)

Contemporary Architecture Design Hot Rolled Steel Wall Panels Industrial Architecture

Hot rolled steel panels lightweight stronger than steel

Hot rolled steel wall panels – stronger than steel


Hot Rolled Steel Large Sliding Doors


Certrified Professional Sing PanelWhen you buy our professional panels, you get our Signature 50 Year Warp Free Guarantee. It ensures you decades of worry free performance.  Sing Core Panels are 100% made in America.  Every panel is handmade, so you get the best quality possible.

Sing Core is Proudly Made in America

We also use materials that are sourced from North America, which means you get better quality products made from better materials.  Coupled with our patented and patented pending Singtech engineering, you get the best of everything!



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Large Hot Rolled Steel Sliding Door with Man Door Specifications

General Specifications

 

Standard Sing Core Hot Rolled Steel Sliding Door Blanks are manufactured with patented Sing Core material as the base interior substrate of the door. The Sing Core substrate material is created using a vertical grain natural wood torsion box design while the traditionally empty voids are filled wall to wall with recycled foam. The foam material is available in various forms depending on your specification. The default is recycled EPS foam. Natural wood lock blocks can be positioned at locations as necessary for locking mechanism placement and/or as sliding hardware anchor points. The core material is framed by 1.25-inch wood stiles and rails for finishing strength and attaching hardware. The torsion box is completed by adhering 20 gauge hot rolled steel as exterior material (skin) according to your specifications. The man door opening is cut out to architectural specifications.

Hot Rolled Steel Sliding Door Surface Material

The door blank surface material is made of 20 gauge hot rolled steel unless otherwise specified. Bonding agent used in adhesion of the entire composite material is formaldehyde-free.

Click here for tips on How to Create the Right Sing Panel for your specific project.

Every Sing Core manufactured door blank is unfinished (unless specified otherwise) and professional grade is guaranteed for 50 years for warp-free and structural integrity.

Detailed Specifications:

Scope: Subject to local building codes, the standard Sing Core sliding door blank is intended for use in:

  • Single family dwelling interior applications
  • Multifamily dwelling, low-rise professional office, library and low-rise motel interior applications
  • Lighter use industrial building and factory, hotel and retail sales building interior applications

 

Hot Rolled Steel Sliding Door Materials: Sing Core hot rolled steel door blanks are manufactured using Eco-friendly cold-press process. Composite materials include:

  • Sing Core vertical wood-grain torsion substrate filled with recycled EPS foam
  • Core material is framed with solid wood stiles and rails
  • Facings are 20 gauge hot rolled steel
  • Formaldehyde-free bonding agent is used for adhesion of all components

Man Door Component: The man door leaf is created to specifications to match the large hot rolled steel sliding door and is to be fitted inside the opening in the large sliding door panel. In this case, 20 g hot rolled steel with 1.25 embedded solid wood frame and lock blocks on either side of the man door.

Architectural Specifications Substitutes

For information on some of our architectural substitutes click here.

Interior Blocking: Solid wood implants can be inserted as lock blocks or anchor points. Also additional stiles (vertical wood implants) or rails (horizontal wood implants) can be positioned at any desired location inside the hot rolled steel sliding door and man door leaf. (Note: Depending on your expectations, solid wood implants should be supported by at least 12 inches of Sing Core material to maintain true flatness.)

Delivery: Reasonable care is taken to ensure safe transportation of your Sing Core large hot rolled steel sliding door with man door from factory to your location including proper crating to protect the natural beauty of your hot rolled steel doors during transport.

Storage and Protection: Store your Sing Core large hot rolled steel sliding doors in an upright position and allow to acclimate to room temperature following shipment receipt or prior to finishing or installation.

Preparation: Per manufacturer’s specifications, ensure that openings or attachment walls are constructed plumb, true and level prior to installation. Select fasteners of adequate type, number and quality to assure proper function.

Installation: Installer shall be specialized in the installation of the type of work that is associated with the project and will comply with manufacturer’s installation policies and procedures to ensure proper end use.

Verify that attachment, hinging and latching assemblies operate freely and correctly

Finishing: The finishing of the Sing Core large hot rolled steel sliding doors and man doors are the responsibility of the client due to the product being delivered in unfinished condition unless specified otherwise in writing for use in interior applications only. Any exterior use must be approved in advance to avoid warranty exception and sealing must be in accordance with manufacturer’s specifications to protect against a variety of environmental conditions as necessary. In reference to exterior applications:

  • Seal all 6 surfaces with two coat minimum on operable panel(s)
  • Finishing or re-finishing must be completed following acclimatization and installed within 7 days
  • Avoid finishing after rain (or damp) or during periods of higher than average humidity
  • At least once a year, conduct periodic inspections of coating to ensure no wall panel components are exposed
  • Reseal the surface as necessary

Machining: Sing Core large hot rolled steel sliding doors are easy to work with in the metal shop for machining or on-site for finishing, and fastening.

Strength Performance: Patented Sing Core has an unsurpassed strength as compared to other lightweight substrate materials tested at 660 PSI (based on 2″ x 2″ grids and 3/4″ thick) for superior structural integrity and is resistant to warp, twist and crack when compared to other materials.

Light Weight Performance: Sing Core weighs much less than other traditional building materials, as much as 50% less; or more, as little as 4 lbs. per sq. ft. yet sustainable and true green technology.

Insulation Performance: Standard Sing Core sliding door blanks feature built-in insulation value with an R3 (can be upgraded to to R6.5 or more) rating per inch, depending on architect’s specifications.

Acoustical Performance: Sing Core standard sliding door blanks have a natural sound-deadening quality for noise control. Standard sound transmission class (STC) is 30. Additional noise control specifications can be met at the behest of the customer or designer and must be noted in advance.

Eco-friendly: Sing Core is manufactured using natural wood fibers, no formaldehyde, or toxic chemicals, is created using less energy than any other core material with little or no waste. The structure of Sing Core is 100% renewable (nature-grown) clean wood fiber and/or recycled material.

Warranty: Sing Core sliding door blanks come with a 10-year warranty, while professional manufactured sliding door blanks can be structurally guaranteed and warp-free for 50 years under normal conditions.

Basic Sing Door Spec Drawings: Click here

variety-of-design-options-for-architectural-doors-illistration-sing-core
Custom-cut Window/Lite Openings: Lite openings for glass inserts can be custom cut per your specifications (drawings above show examples of standard openings) for glass insertion.

Door Specifications

Door Width
Rough Opening Width
Rough Opening Height 6/8
2/0 (Single) 26″ 82-1/2″
2/4 (Single) 30″ 82-1/2″
2/6 (Single) 32″ 82-1/2″
2/8 (Single) 34″ 82-1/2″
3/0 (Single) 38″ 82-1/2″
4/0 (Double) *50″ 82-1/2″
4/8 (Double) *58″ 82-1/2″
5/0 (Double) *62″ 82-1/2″
5/4 (Double) *66″ 82-1/2″
6/0 (Doulble) *74″ 82-1/2″

See also: Door Technical Information

Appearing regularly in Contemporary Architecture Design

* Note: STC rating varies according to size, thickness, skin, and other factors. Sing Core does not rate doors, although we are fortunate enough to have one of the best sound testing labs in the world, here in the Pacific Northwest. If you require a specific STC rating, Sing Core can build a door to your architectural specifications and have the resulting door tested at our rating facility for an official rating.

 

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Hot Rolled Steel Doors

Large hot rolled steel panels being finished for installation in winery

Hot rolled steel panels high precision

Sing Core brings an Eco-friendly approach to working with large spans of hot rolled steel with less weight and more strength than plain steel pound for pound, revolutionizing the steel fabrication process. In fact, we are best known for our large hot rolled steel metal doors and hot rolled steel wall panels.

Our patented rolled steel panels feature custom metal fabrication uses high grade formaldehyde free adhesives instead of the more destructive welding process and your Sing Hot Rolled Steel Panel can host an exterior hot rolled sheet metal thickness of 16 gauge or more.

Sing hot rolled steel takes metal working into a whole new arena that is being embraced by steel companies making huge hot rolled steel products without having to use heavy steel framing.

These lightweight high strength hot rolled steel accordion doors (see video above) are 10 ft tall, each door panel is 3 ft wide and (brace yourself) only 3/4 inch thick… high precision and perfectly straight! (Try that with anything else… Only possible with patented Sing Core.)

Hot rolled steel accordian door panels quote request form example

Click for order example

One of the primary functions of Sing hot rolled steel products is in the area of commercial steel entry doors. If you are new to metal manufacturing, you will find that raw hot rolled steel has a more primitive or industrial feel to it, it has a less smooth surface than cold rolled steel and requires finishing to avoid rust or oxidation. The unique appearance of hot rolled steel panels appeals to designers, architects, museums, art galleries and often used in steel wall art.

Sing metal wall panels lightweight stronger than steel pound for poundEspecially if you’re considering utilizing hot rolled steel for your large doors, Sing Core can help to mitigate the damages caused by the heavy weight of hot rolled steel doors with interior steel frames that require welding. This allows you to build hot rolled steel doors of immense size that are high precision, just like other types of Sing metal.

The Sing Core material is extremely high precision (within +/- .006 inch) which keeps your hot rolled steel door straight and flat regardless of its size. The advantages of the straighter and truer big metal doors come in handy when you multiply the door’s required integrity by two when dealing with steel double doors. Double steel doors, especially if they are large and oversized, are fraught with additional challenges.

Sing hot rolled steel can be used for upscale industrial steel doors and in commercial metal door replacements for increased performance and high precision which also supply the project with built in insulation and sound deadening qualities.

Galvanized steel modular wall panel 20 ft x 5 ft x 1 inch strength demonstration

20 ft x 5 ft x 1 inch strength demonstration

Our hot roll steel solutions are changing the scope of architectural metal fabrication because the nature of hot rolled steel is predominantly restrictive due to the weight and framing required to support the raw material. Having access to a lightweight, high strength alternative, like Sing Hot Rolled Steel Panels, opens doors to unencumbered creativity.

Sing Core’s hot rolled steel doors are just some of the best doors that are among the many types of doors that have put us on the map as the best door featured in the most high end jobs across the country and the world.

You will find Sing hot rolled steel panels used not only as a standard swing door but also as hot rolled steel flooring, hot rolled steel counter tops, hot rolled steel wall panels and room dividers, hot rolled steel pivot doors and hot rolled steel sliding doors.

Let Sing hot rolled steel set your creativity free. See also: Steel Fabrication

Click here for hot rolled steel prices.

20 ft steel door steel metal building

21 ft. tall Sing Steel Pivot Door (right on building)

Contemporary Architecture Design Hot Rolled Steel Wall Panels Industrial Architecture

Hot rolled steel panels lightweight stronger than steel

Hot rolled steel wall panels – stronger than steel

Hot Rolled Steel Large Sliding Doors