Bank vault

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A bank vault is a secure room used by banks to store and protect valuables, cash, and important documents. Modern bank vaults are typically made of reinforced concrete and steel, with complex locking mechanisms and security systems. This article covers the design, construction, and security features of bank vaults.

Contents

This large 24-bolt Diebold vault door at the Winona National Bank was built in the early 1900s. On the right is the back side of the open door. To the right of the door's center are two linked boxes for the combination mechanisms and to the left is a four-movement time lock. This door has a four-point system for pressing the door into its opening (note the two stanchions left of the door opening) capable of exerting one third of the door's weight in closing force. Since this door weighs 22.5 short tons (20.4 t) this system is capable of applying 7.5 short tons-force (67 kN) inward. WinonaSavingsBankVault.JPG
This large 24-bolt Diebold vault door at the Winona National Bank was built in the early 1900s. On the right is the back side of the open door. To the right of the door's center are two linked boxes for the combination mechanisms and to the left is a four-movement time lock. This door has a four-point system for pressing the door into its opening (note the two stanchions left of the door opening) capable of exerting one third of the door's weight in closing force. Since this door weighs 22.5 short tons (20.4 t) this system is capable of applying 7.5 short tons-force (67 kN) inward.

Unlike safes, vaults are an integral part of the building within which they are built, using armored walls and a tightly fashioned door closed with a complex lock.

Historically, strongrooms were built in the basements of banks where the ceilings were vaulted, hence the name. Modern bank vaults typically contain many safe deposit boxes, as well as places for teller cash drawers and other valuable assets of the bank or its customers. They are also common in other buildings where valuables are kept such as post offices, grand hotels, rare book libraries and certain government ministries.

Vault technology developed in a type of arms race with bank robbers. As burglars came up with new ways to break into vaults, vault makers found new ways to foil them. Modern vaults may be armed with a wide array of alarms and anti-theft devices. Some 19th and early 20th century vaults were built so well that today they are difficult to destroy, even with specialized demolition equipment. [1] These older vaults were typically made with steel-reinforced concrete. The walls were usually at least 1 ft (0.3 m) thick, and the door itself was typically 3.5 ft (1.1 m) thick. Total weight ran into the hundreds of tons (see Federal Reserve Bank of Cleveland). Today vaults are made with thinner, lighter materials that, while still secure, are easier to dismantle than their earlier counterparts.[ citation needed ]

Design

Vault of a retail bank under demolition Vault of a retail bank under demolition.tiff
Vault of a retail bank under demolition

Bank vaults are custom-designed and are usually one of the first elements considered when planning a new bank building. The vault manufacturer works with the bank to determine specifications like size, shape, and security features. Modern vaults are typically constructed using steel-reinforced modular concrete panels engineered for maximum strength and crush resistance. A 3-inch thick panel of specialized concrete can be up to 10 times stronger than an 18-inch panel of standard concrete.

Bank vaults are typically made with steel-reinforced concrete. This material was not substantially different from that used in construction work. It relies on its immense thickness for strength. An ordinary vault from the middle of the 20th century might have been 18 in (45.72 cm) thick and was quite heavy and difficult to remove or remodel around. Modern bank vaults are now typically made of modular concrete panels using a special proprietary blend of concrete and additives for extreme strength. The concrete has been engineered for maximum crush resistance. A panel of this material, though only 3 in (7.62 cm) thick, may be up to 10 times as strong as an 18 in-thick (45.72-cm) panel of regular formula concreted.

There are at least two public examples of vaults withstanding a nuclear blast. The most famous is the Teikoku Bank in Hiroshima whose two Mosler Safe Company vaults survived the atomic blast with all contents intact. The bank manager wrote a congratulatory note to Mosler. [2] [3] A second is a vault at the Nevada National Security Site (formerly the Nevada Test Site) in which an above ground Mosler vault was one of many structures specifically constructed to be exposed to an atomic blast in Operation Plumb Bob - Project 30.4:Response of Protective Vaults to Blast Loading. [4] [5]

Manufacturing process

Panels

Fichet Paris, Vault of Credit Lyonnais Immeuble du Credit Lyonnais (siege).jpg
Fichet Paris, Vault of Crédit Lyonnais

The wall panels are molded first using a special reinforced concrete mix. In addition to the usual cement powder, stone, etc., additional materials such as metal shavings or abrasive materials may be added to resist drilling penetration of the slab. Unlike regular concrete used in construction, the concrete for bank vaults is so thick that it cannot be poured. The consistency of concrete is measured by its "slump". Vault concrete has zero slump. It also sets very quickly, curing in only six to 12 hours, instead of the three to four days needed for most concrete. [6] [7]

Door

The vault door is also molded of special concrete used to make the panels, but it can be made in several ways. The door mold differs from the panel molds because there is a hole for the lock and the door will be clad in stainless steel. Some manufacturers use the steel cladding as the mold and pour the concrete directly into it. Other manufacturers use a regular mold and screw the steel on after the panel is dry.

Round vault doors were popular in the early 20th century and are iconic images for a bank's high security. They fell out of favor due to manufacturing complexities, maintenance issues (door sag due to weight) and cost, but a few examples are still available. [8] [9]

A day gate is a second door inside the main vault door frame used for limited vault protection while the main door is open. It is often made of open metal mesh or glass and is intended to keep a casual visitor out rather than to provide true security. [10]

Lock

A vault door, much like the smaller burglary safe door, is secured with numerous massive metal bolts (cylinders) extending from the door into the surrounding frame. Holding those bolts in place is some sort of lock. The lock is invariably mounted on the inside (behind) of the difficult-to-penetrate door and is usually very modest in size and strength, but very difficult to gain access to from the outside. There are many types of lock mechanisms in use:

Installation

US resistance standards

Quality control for much of the world's vault industry is overseen by Underwriters Laboratories, Inc. (UL) in Northbrook, Illinois. UL rates vaults based on their resistance to mock break-in attempts. Key points of the UL-608 standard include:

RatingTime to Breach Vault
Class M15 minutes
Class I30 minutes
Class II60 minutes
Class III120 minutes

European resistance standards

As with the US, Europe has agreed a series of test standards to assure a common view of penetrative resistance to forcible attack. [13] The testing regime is covered under the auspices of Euronorm 1143-1:2012 (also known as BS EN 1143-1: 2012), [14] which can be purchased from approved European standards agencies. [15] [16]

Key points include:

A modern highly portable core drill Core Drill.jpg
A modern highly portable core drill
An explosive door breaching test Explosive Breach Training at Camp Ethan Allen Training Site 130511-Z-WM282-951.jpg
An explosive door breaching test
Resistance GradeResistance Value to Breach VaultLock QuantityExplosive Rating PossibleCore Drill Rating Possible
030OneNoNo
I50OneNoNo
II80OneYesNo
III120OneYesNo
IV180TwoYesNo
V270TwoYesNo
VI400TwoYesNo
VII600TwoYesNo
VIII825TwoYesYes
IX1050TwoYesYes
X1350TwoYesYes
XI2000Two or ThreeYesYes
XII3000Two or ThreeYesYes
XIII4500Two or ThreeYesYes

Future

Bank vault technology changed rapidly in the 1980s and 1990s with the development of improved concrete material. Bank burglaries are also no longer the substantial problem they were in the late 19th century up through the 1930s, but vault makers continue to alter their products to counter new break-in methods.

An issue in the 21st century is the thermal lance. Burning iron rods in pure oxygen ignited by an oxyacetylene torch, it can produce temperatures of 6,600–8,000 °F (3,650–4,430 °C). The thermal lance user bores a series of small holes that can eventually be linked to form a gap. Vault manufacturers work closely with the banking industry and law enforcement in order to keep up with such advances in burglary.[ as of? ]

Related Research Articles

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<span class="mw-page-title-main">Linus Yale Jr.</span> American mechanical engineer (1821–1868)

Linus Yale Jr. was an American businessman, inventor, mechanical engineer, and metalsmith. He was a co-founder with millionaire Henry R. Towne of the Yale Lock Company, which became the premier manufacturer of locks in the United States. He was the country's leading expert on bank locks and its most important maker. By the early 20th century, about three-quarter of all banks in America used his bank locks. He is best remembered for his inventions of locks, especially the cylinder lock, and his basic lock design is still widely distributed today, and constitutes a majority of personal locks and safes.

<span class="mw-page-title-main">Combination lock</span> Type of locking device in which a sequence of symbols, usually numbers, is used to open the lock

A combination lock is a type of locking device in which a sequence of symbols, usually numbers, is used to open the lock. The sequence may be entered using a single rotating dial which interacts with several discs or cams, by using a set of several rotating discs with inscribed symbols which directly interact with the locking mechanism, or through an electronic or mechanical keypad. Types range from inexpensive three-digit luggage locks to high-security safes. Unlike ordinary padlocks, combination locks do not use keys.

<span class="mw-page-title-main">Safe</span> Secure lockable box used for securing valuable objects

A safe is a secure lockable enclosure used for securing valuable objects against theft or fire. A safe is usually a hollow cuboid or cylinder, with one face being removable or hinged to form a door. The body and door may be cast from metal or formed out of plastic through blow molding. Bank teller safes typically are secured to the counter, have a slit opening for dropping valuables into the safe without opening it, and a time-delay combination lock to foil thieves. One significant distinction between types of safes is whether the safe is secured to a wall or structure or if it can be moved around.

<span class="mw-page-title-main">Structural insulated panel</span>

A structural insulated panel, or structural insulating panel, (SIP), is a form of sandwich panel used in the construction industry.

<span class="mw-page-title-main">Safe-cracking</span> Process of opening a safe without either the combination or the key

Safe-cracking is the process of opening a safe without either the combination or the key.

<span class="mw-page-title-main">Insulating concrete form</span> Construction material

Insulating concrete form or insulated concrete form (ICF) is a system of formwork for reinforced concrete usually made with a rigid thermal insulation that stays in place as a permanent interior and exterior substrate for walls, floors, and roofs. The forms are interlocking modular units that are dry-stacked and filled with concrete. The units lock together somewhat like Lego bricks and create a form for the structural walls or floors of a building. ICF construction has become commonplace for both low rise commercial and high performance residential construction as more stringent energy efficiency and natural disaster resistant building codes are adopted.

<span class="mw-page-title-main">United States Bullion Depository</span> Fortified vault building in Fort Knox, Kentucky

The United States Bullion Depository, often known as Fort Knox, is a fortified vault building located next to the United States Army post of Fort Knox, Kentucky. It is operated by the United States Department of the Treasury. The vault is used to store a large portion of the United States' gold reserves as well as other precious items belonging to or in custody of the federal government. It currently holds roughly 147 million troy ounces of gold bullion, a little over half the total gold presently held by the federal government. The United States Mint Police protects the depository.

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<span class="mw-page-title-main">Precast concrete</span> Construction material

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<span class="mw-page-title-main">Time lock</span> Timer designed to prevent the opening of the safe or vault until it reaches the preset time

A time lock is a part of a locking mechanism commonly found in bank vaults and other high-security containers. The time lock is a timer designed to prevent the opening of the safe or vault until it reaches the preset time, even if the correct lock combination(s) are employed.

<span class="mw-page-title-main">Door security</span> Methods to prevent unwanted entry

The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions. Door security is used in commercial and government buildings, as well as in residential settings.

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<span class="mw-page-title-main">Mosler Safe Company</span>

The Mosler Safe Company was an American multinational manufacturer of security equipment specializing in safes and bank vaults. In 2001, the company was acquired by Diebold Inc. after going bankrupt.

<span class="mw-page-title-main">Locker</span> Storage compartment

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<span class="mw-page-title-main">Armored car (valuables)</span> Specially-designed vehicle used to ensure safe transport of valuables and people

An armored vehicle is an armored van or truck used to transport valuables, such as large quantities of money or other valuables, especially for banks or retail companies. The armored car is typically a multifunctional vehicle designed to protect and ensure the wellbeing of the transported contents and guards. Typically customized on a basic van or truck chassis, they feature bullet-resistant glass, armor plating, and reinforced shells and cabs. Armored cars are designed to resist attempts at robbery and hijacking, being able to withstand bullets from most handguns and rifles, as well as extreme degrees of heat, explosives, and collisions.

Fichet-Bauche is a brand of safes, vaults, and locks produced by Fichet Security Solutions, a business owned by OpenGate Capital. Specializing in fireproof safes, the original company and its brand was founded in 1967 as a result from a merger between Fichet, a locksmithing company, and Bauche, a fire-protection specialists company. The brand is widely sold and marketed in France, Spain, Portugal, Italy and French speaking parts of Africa.

European Certification Body“ (ECB) is a since 7 July 1992 accredited and neutral certification body for physical security products. It certifies according to – without any national additional requirements. ECB issues the ECB•S certification mark.

This is a glossary of locksmithing terms.

<span class="mw-page-title-main">Frederick S. Holmes</span> American vault engineer (1865 to 1941)

Frederick S. Holmes was an American safe and vault engineer, and inventor who designed the largest vaults in the world. During his career, Holmes designed hundreds of vaults throughout the United States, Canada and Japan from 1895 to 1941. The majority of Holmes designed vaults are located in New York's Financial District; many are publicly accessible and in buildings on the National Register of Historic Places. His name is engraved on the builder's plaques, typically located on the encased jamb controls of these vaults.

References

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