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Security-Rated Industrial Bi-Folding Doors

Built to keep burglars out and heat in

A security-rated bi-folding door so well built that two RISE engineers with axes, crowbars and power drills could not get through it. Same insulation as our standard door, same widths up to 25 metres, and a steel core that gives up nothing when someone attacks it.

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A Vault for Your Business

Torverk's security-rated doors are certified to SSF 1074 classes SK2 and SK3, tested and approved by RISE, the Research Institutes of Sweden. In our assessment the protection they deliver is comparable to EN 1627 Resistance Class RC3 and RC4, though the doors are not certified to EN 1627 itself.

They insulate as well as our standard doors, so you are not trading heating costs for security.

Tested and Approved by RISE

Over half of all industrial businesses get broken into

When the Swedish business organisation Företagarna surveyed 819 companies about break-ins over five years, 61% of industrial businesses said yes, it had happened to them.

Swedish figures, but the pattern travels. Workshops, depots and stations hold tools, vehicles and equipment that move easily and sell fast.

Stop Break-Ins and Save Energy

The security door features the same sandwich construction as our standard folding doors, but with reinforced door panels.

The outer shell is roll-formed from 0.6 mm thick corrosion-resistant SSAB steel and reinforced at the corners with 4 mm hardened DOMEX steel.

We then fill the leaf with polyurethane foam at 4.5 bar. The foam expands, works its way into every cavity and bonds chemically with the steel and the end profiles.

Once it cures, the foam is as hard as a hockey puck and insulates four times better than standard building insulation.

Reinforced Hinges

The hinges resist hacksaws, jigsaws, drills, hand hammers, and punches, forcing burglars to give up.

Security Glass in Torverk’s Burglary-Resistant Folding Door

Armoured glass

Layers of glass bonded with a strong, flexible film. It resists impact and penetration, keeps burglars out and lets daylight in.

Secure Locking Mechanism on Torverk’s Security-Rated Folding Door

Pick-Resistant Locking Mechanism

Torverk's locking mechanism withstands axe strikes and drill attacks.

Two bearded RISE engineers had ten minutes to breach the door. They failed.

RISE in Borås Tests SSF 1074 Security Classification of Folding Doors

Searching for Weaknesses…

In a workshop at RISE in Borås, two engineers are reviewing the drawings of a Torverk security door.

They're searching for weaknesses in the design.

Armed with crowbars, axes, drills, and other tools, they will attempt to breach every part of the door. For each attack attempt, they have 10 minutes.

If they succeed, the door fails the test.

RISE testing burglary resistance in a folding door from Torverk

First Attack: The Door Panel

They start chopping the door panel with an axe.

They manage to create a small hole, then pry it open with a crowbar and try to get through the reinforcement using bolt cutters.

After ten minutes, the hole is still too small, so they move on to attacking the hinges instead.

Then The Hinges

Sweating, they take turns sawing through the hinge pins with a hacksaw and jigsaw.

After ten minutes, a small notch appears, which they pry open with a crowbar and try to wedge with nails.

When that fails, they use a drill on the screw heads and hinge fittings, with no success.

In a final effort, they try to knock out the hinge pin using a hand hammer and punch.

But they come up empty-handed.

… Glass

The engineers don't bother smashing the laminated glass with a hammer, they know it can't be broken that way.

Instead, they pry around the entire window frame with a crowbar but fail to breach it within the SK2 time limit.

RISE testing the espagnolette on a resistance classed folding door from Torverk

… and the espagnolette

In a final desperate attempt, they saw with a hacksaw and pry with a knife at the bottom to reach the espagnolette.

They chop with an axe and forcefully pry with a crowbar and bolt cutters at the top edge of the door. Then they try to drill through the espagnolette rod.

But time runs out, and the door passes the test.

Choose from Thousands of Colours

Choose from 10 standard colours or paint your door in any RAL or NCS S shade.

If you want a pattern or image on your door, we print it on a film that is applied to the surface. We have produced doors with wood grain and a wide range of other designs.

Note: Colours displayed on screen may appear different in reality.

Selected color: Antikvit – RAL 9002

Can a Security-Rated Door Look Any Way You Want?

The answer is no. To be certified, security doors must meet specific requirements.

Specifications for SK2-Rated Doors:

Hinges must be welded to the wall.
Can open inward or outward.
May include windows and a pedestrian door.
Must be equipped with a padlockable espagnolette, even if motorised.
Maximum height of 6000 mm and width up to 14.5 metres for motorised doors or 25 metres for manual doors.

Specifications for SK3-Rated Doors:

Hinges must be welded to the wall.
Can open inward or outward.
May include a pedestrian door but no windows.
Must be equipped with at least two padlockable espagnolette locks, even if motorised.
Maximum height of 6000 mm and width up to 14.5 metres for motorised doors or 25 metres for manual doors.

Security-rated doors can be built up to 14.5 meters wide when motorized and 25 meters wide when manual.

Up to 14.5 Metres Wide Motorised and 25 Metres Wide Manual

How SK, RC and LPS 1175 compare

Three frameworks come up when someone specifies a burglar-resistant door in Europe. They measure the same thing, resistance to forced entry, but they are not interchangeable.

What Do SK1, SK2, and SK3 Mean?

The Swedish Theft Prevention Association developed a burglary protection standard called SSF 1074. Testing is carried out by institutes such as RISE in Borås. The testers get a defined set of tools and a time limit, and try to break through. Higher classes mean heavier tools for longer.

SK1 withstands a five-minute attack using simple tools: pliers, screwdriver, knife and rubber mallet.

SK2 withstands a five-minute attack using everything permitted in SK1 plus crowbar, handsaw, hammer and hand drill. Our door meets SK2 with windows and a pedestrian door fitted.

SK3 withstands a ten-minute attack using everything permitted in SK2 plus axe, battery-powered drill, bolt cutters and hand hammer. Our door meets SK3 without windows or pedestrian doors.

SK is what Swedish insurers ask for.

EN 1627: the European resistance classes RC1 to RC6

Published as BS EN 1627 in the UK, so specifiers here can reference it directly. It works on the same principle, a tool set and a contact time for each class, but the tools, times and procedures are its own.

Worth knowing: EN 1627 covers pedestrian doorsets, windows, curtain walling, grilles and shutters. A 25-metre industrial bi-folding door sits outside that scope. That is one reason we describe our doors as comparable to RC3 and RC4 rather than rated to them.

In our assessment, SK2 delivers protection comparable to RC3, and SK3 comparable to RC4. That is our reading of the two test regimes, not a certified equivalence, and we would rather say so plainly than let a specification rest on it.

LPS 1175: the British standard and its SR ratings

Run by the LPCB, part of BRE. This is what UK insurers, police-backed schemes such as Secured by Design, and most sensitive or government sites ask for.

Older certificates use SR ratings, SR1 to SR8. Issue 8, published in 2019, uses a letter for the tool category and a number for the delay in minutes, so a rating reads as something like D10.

Torverk doors are not tested to LPS 1175. If your specification requires an LPCB certificate, we cannot meet it today. If your specification works to EN 1627, or you want a door that has been attacked by engineers under an accredited test and held, we should talk.

Contact your sales representative

International sales

Peter Löfvenholm

Phone: +46 560-68 98 00

Mobile: +46 70-523 53 83

Email: peter.lofvenholm@torverk.se

Frequently asked questions

What Is the Difference Between Security Class 2 and Security Class 3?

Security Class 2 doors can be equipped with windows and pedestrian doors, while Security Class 3 doors offer stronger burglary protection but are not permitted to have windows.

Are Torverk doors certified to RC3 or RC4?

No. They are certified to SSF 1074 SK2 and SK3, tested by RISE. We consider the protection comparable to RC3 and RC4, but EN 1627 covers pedestrian doorsets rather than large industrial doors, and we hold no RC certificate.

Does Torverk offer LPS 1175 rated doors?

Not today. Our doors are tested to Swedish SSF 1074. If you need an LPCB certificate for insurance or a government specification, tell us, because demand shapes what we test next.

Will a security-rated door satisfy my insurer?

It depends on your insurer and your country. Swedish insurers work to SSF classes. UK insurers usually ask for LPCB certification. Ask your insurer what they require before you specify.

Does a security-rated door insulate as well as a standard one?

Yes. Same sandwich construction, same foam core, with reinforced leaves added.

How wide can a security-rated door be?

Up to 14.5 metres electric, or 25 metres manual, and up to 6000 mm high.