Fire safety requirements for stage curtains. Fire curtains. What is a fire retardant curtain

According to STB 11.0.03-95 "Passive fire protection. Terms and definitions" under fire protection

weight means a smoke-tight structure with a standardized fire resistance limit, made of non-combustible materials, separating the stage complex from the auditorium along the portal opening in the event of a fire.

According to SNB 2.02.01-98 "Fire-technical classification of buildings, building structures and materials" clause 4.9. 1 type of fire curtain has been installed with a fire resistance limit (in min) of at least EI 60.

A fire curtain is a device for protecting the portal opening of the stages of clubs and theaters and is provided for auditoriums with a capacity of 800 seats or more.

Reliable and efficient operation of the fire curtain is of great importance for ensuring the safe evacuation of spectators and successful fire extinguishing. This determines the design of the curtain, which must have adequate fire resistance, strength and gas tightness.

Depending on the design of the portal opening, fire curtains are divided into lift-and-fall and sliding curtains. According to the number of panels - single-field and double-field.

The panel of a lifting-lowering single-floor curtain is suspended at two points using steel ropes thrown over blocks and connected to counterweights (Fig. 7.17, a). In addition, the panel is connected through a system of ropes and blocks to a winch. The reliability of the curtain's operation is achieved by using counterweights, which ensure its gravitational, non-motorized descent. The amount of excess of the curtain weight over the weight of the counterweights is determined by the conditions for lowering the curtain under the influence of its own weight, the type of curtain and the suspension scheme.

Sometimes a lift-and-fall curtain is constructed from two panels (Fig. 7.17, b). In this scheme, the upper panel is somewhat larger and necessarily heavier than the lower one. When the winch brake is released, the upper panel tends downwards and, acting through the ropes on the lower one, forces it to rise up until both panels touch.

A double-floor lift-and-fall curtain is used when the wall height is insufficient, when it is impossible to provide a single-floor lift-and-fall curtain. The advantage of a double-leaf lift-and-fall curtain over a single-leaf curtain is faster closing of the portal opening, less weight and the absence of counterweights, however, the design of a two-leaf curtain is less reliable than a single-leaf curtain. Due to the presence of an edge at the junction of two panels, it has greater smoke resistance.

For this suspension scheme, options for protection from the effects of high temperatures of the rope-block system are being developed.

The movement pattern of a sliding single-floor curtain is chosen in such a way that when the winch brake is released, the curtain blocks the portal opening under the influence of a counterweight (Fig. 7.17, c).

With two sliding curtain panels, their extension pattern repeats the previous one, but in the rope-block system (Fig. 7.17, d) the number of blocks and the total length of the ropes are increased. The winch power and counterweight weight have also been changed.

Rice. 7.17.

a - single-floor lift-and-lower, b - double-floor lift-and-fall, c - single-floor sliding, d - double-floor sliding;

1 - counterweight, 2 - fire curtain panel, 3 - winch.

It should be noted that sliding curtains are used relatively rarely due to the need to create a slot in the stage plank to ensure the movement of the panels on the skating rinks along the guides, which limits the full use of the site during performances.

A number of requirements are imposed on the mechanism for moving fire curtains, the most important of which are failure-free operation and relative speed of closing the portal opening. The movement of the fire curtain when closing the portal wall opening is due to the force of gravity (when the winch cable is loosened) at a speed of at least 0.2 m/s. Remote control of the curtain movement is carried out from the fire station room, the fire curtain winch room and from the stage tablet. The curtain must have an audible alarm to indicate movement of the curtain.

Design

The curtain is a rigid spatial system in the form of a metal frame, protected from high temperatures from the stage side by thermal insulation.

The frame of the lifting and lowering curtain consists of horizontal beams connected to each other by vertical and diagonal connections, reinforced in a quadrangular frame (Fig. 7.18.). Sometimes the beams are designed to be vertical and the ties to be horizontal. In large modern theaters with significant portal openings, where the curtain has a mass of over 25 tons, the horizontal beams are made in the form of trusses located at a distance of 1.2-2 m, the frame is made of large-section channel beams. To give the curtain frame greater rigidity, horizontal truss beams are connected by vertical and diagonal ties, usually made of angle steel.

Rice. 7.18.

vertical connections,

diagonal connections,

vertical beams,

horizontal beams.

The curtain frame is designed for standard horizontal pressure from the side of the auditorium, taken equal to 10 Pa for each meter of stage height from the stage to the roof ridge with a load factor of 1.2. In this case, the deflection of metal elements, taking into account temperature influences (at t = 200 0 C), should not exceed 1/200 of their length.

Thermal insulation of the fire curtain to protect against the temperature effects of the frame and prevent the penetration of combustion products through the canvas (Fig. 7.19.) is provided only from the stage side. The thermal insulation material is non-flammable, has very good thermal insulation properties and does not emit toxic thermal decomposition products when heated.

The most widely used for thermal insulation of curtains are sovelite, vermiculite and perlite slabs. These plates are attached to corrugated steel, which in turn is attached to the curtain frame. To ensure gas-tightness of the canvas, heat-insulating boards are covered with asbestos-diatom plaster. The thickness of the thermal insulation is provided in such a way that the temperature on the surface of the frame does not exceed 200 0 C one hour after the fire occurs when the average volume temperature changes over time in accordance with ST SEV 1000-78.

Rice. 7.19.

1 - asbestos diatom plaster,
2 - sovelite slabs,
3 - corrugated steel,
4 - horizontal beam (I-beam),
5 - vertical connections (corners).

The fire curtain cloth covers the opening of the construction portal from the sides by at least 0.4 m and from the top by 0.2 m. Sealing of the junctions with the portal wall is ensured by the installation of labyrinth seals, sand gates and other technical solutions.

For lift-and-fall and sliding curtains, the top of the curtain is connected to the portal wall using a sand gate (Fig. 7.20, a). The sand layer is practically impenetrable to gases, so the sand seal is a fairly reliable barrier against the penetration of combustion products through the upper edge of the curtain. The upper edge of the curtain, as well as part of the visor, is covered with thermal insulation.

The sealing of the lower edge of a single-floor lift-and-fall curtain is shown in Fig. 7.20, b. A wooden beam is bolted to the bottom beam of the curtain frame, protected by two layers of felt soaked in a clay solution, asbestos fabric and two layers of tarpaulin. The light and at the same time fireproof cushion formed in this way, being pressed by the curtain to the stage plank, fills all its unevenness and creates a barrier impenetrable to gases.

The side guides of the lift-and-fall curtain are usually sealed using labyrinth seals (Fig. 7.20, c). Guides, as a rule, are made of two unequal angles and are attached to the portal wall using bolts or other devices. Accordingly, corners are welded to the side beam of the frame, extending beyond the guides and preventing the curtain from moving to the side when moving. There is a gap between the ends of the guide corners for free expansion of the curtain frame when it is heated. It should be noted that such a connection does not provide proper tightness.

Rice. 7.20.

a - top, b - bottom, c - side;

1 - plaster, 2 - heat-insulating mats, 3 - corrugated steel, 4 - canopy, 5 - portal wall, 6 - steel trough, 7 - vertical connections, 8 - guide corners, 9 - curtain frame frame, 10 - horizontal beam, 11 - two layers of felt soaked in a clay solution, 12 - asbestos (sheet or fabric), 13 - two layers of tarpaulin, 14 - portal wall console, 15 - wooden beam.

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In rooms with an auditorium with more than 800 seats, fire-retardant curtains must be installed. The presence of such a screen is a safety requirement laid down in current regulations. Its task is to obtain a certain amount of time in order to:

organize the evacuation of people from a burning building;
localize the source of the fire.

Cost of fire curtains

Design dimensions (mm.)	Cost, rub.)

*Please note that the above calculation is for the basic design. The exact cost can be found out after completing the application.

To calculate the cost use the special form or call the contact numbers provided.

You can also order a call back, and we will get in touch and answer any questions you may have.

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What is a fire retardant curtain?

The OLEMATH company produces fire curtains, which are heavy steel structures. They are lowered by a powerful electric drive.

Why are fire curtains needed?

When the screen is lowered, the stage portal opening is completely blocked. In this way, the auditorium is protected from rooms containing a lot of combustible and flammable materials. This includes scenery and props for performances, wooden stage structures, etc.

During a performance, there is always an increased risk of fire due to the use of a large amount of equipment and sometimes open fire. Fire curtains prevent flames and carbon monoxide from spreading into the auditorium. Visitors are given sufficient time to evacuate safely. Actors and stage workers leave the dangerous place through other prepared emergency exits.

As practice shows, the auditorium fills with smoke in just 1–2 minutes. A fireproof screen prevents the spread of combustion products for different periods of time depending on the material it is made of. The minimum protective period here is 60 minutes, the maximum guaranteed by the manufacturer is 3 hours.

Our company produces and installs fire curtains, curtains and screens of any size. When installing them, a system of counterweights is created to reduce the effort when lifting the screen. The design of the canvas is worked out in such a way that in the absence of a motor it lowers at a speed of no more than 0.4 m/s. This eliminates the risk of injury to people on or near the stage. Sound and light alarms warn of screen movement.

To order a fire curtain, leave us a message or call the numbers provided. We will send a specialist to you free of charge for measurements and more detailed consultation.

Work examples

Left a message and they called back promptly. They talked about the features of different curtains (I couldn’t decide on a choice). Moreover, they not only helped us choose the right option for fire curtains, but also talked in detail about the various intricacies of their operation. In the end I chose OLEMAT E 180 curtains.

The order was completed without delay. The delivery didn't disappoint either. As a result, I have no complaints about the work performed. Overall I was pleased. I wish the company prosperity and development.

On behalf of our production company, we express our gratitude to the Fire Safety Standard company. Over the years of close cooperation, we have not had any complaints; all situations were resolved quickly and efficiently. We have never failed with deadlines. Subsequent maintenance is carried out efficiently. We ordered the production of fire protection for conveyor openings and smoke curtains.

This is due to the fact that they have a rather small range of possible geometric dimensions, weight, and structural mass, which allows them to be closed quickly, even with an electric drive, in the event of a fire in the protected or adjacent premises. For example, for most manufacturers, the reasonable limit for custom sizes ends at double-leaf fire doors - 2.1 x 2.2; gate – 4.8 x 4.8; 4 x 6. Curtains of the same purpose actually have no restrictions on width/height. In addition, they can be both vertical and horizontal, performed with or without sprinkling the canvas with water for additional fire protection.

They are now widely advertised, being called either simply an excellent replacement for traditional structures for protecting openings in barriers of a capital nature, or even an innovative breakthrough in fire protection during the construction of buildings/structures of grandiose design and complexity of architectural and planning solutions, dividing them into fire compartments vertical and horizontal curtains, invisible until a critical situation arises, protecting adjacent rooms not only from open fire and intense heat exposure; but also from toxic combustion products. Is this how it really is, what are the real advantages and disadvantages of this new product? It’s worth understanding in detail.

Rules and regulations

To immediately put all the semicolons in place, it must be said that GOST “Fireproof curtains” - today there is no regulatory framework for state technical documentation in nature. Numerous manufacturers of domestic products, suppliers/sellers of imported goods, referring to SNiP, GOST, which their products allegedly fully comply with, are, to put it mildly, wishful thinking.

In order to understand this more thoroughly, and without offending anyone, you first need to understand what specific documents issued by government bodies in the field of technical regulation, and why some manufacturers/suppliers sometimes refer to them (the majority do not do this):

defining the fire resistance testing method for doors/gates.
– for the same products for smoke and gas tightness.
– fire resistance test methods for smoke screens.

Neither in the titles nor in the text of the first two official documents does the name of interest to readers appear at all. The latter is defined below.

From fire terminology: an anti-smoke screen/blind/curtain is a device that prevents the spread of combustion products through the openings of enclosing structures.

Again, not a word about fire curtains, although in terms of their basic design, smoke screens/curtains are closest to them, differing, in fact, only in the less fire-resistant, non-flammable materials used for their production, some differences that are not fundamental in this case.

To get through the regulatory bureaucratic jungle and understand why such products are nevertheless legally manufactured, installed and operated, you need to refer to the 2008 document (as amended in July 2015), regulating the technical aspects of industrial safety:

Art. 37, classifying barriers, introduces another type - fire curtains, curtains, screens.
Paragraph 2 of this article states that curtains/screens, along with doors/gates, hatches/valves, are divided into types 1, 2, 3, and curtains belong to type 1.

Based on this, fire curtains, as a means of filling any openings in barriers enclosing fire compartments and areas of buildings, are finally officially legalized.

Materials for the production of fire curtains/screens must be non-flammable.
In construction, technological/transport openings, barriers separating fire hazardous premises of category B, which cannot be closed with gates/doors, it is allowed to install fire curtains/screens instead.
Curtains with a rated fire resistance limit, operated in the open position, must be equipped with devices that ensure automatic closing in case of fire.

In addition, the “green street” for the use of fire curtains is opened by: , which determines the fire resistance of buildings/structures; regulating the limitation of fire spread:

Fire curtains refer to building structures that act as barriers.
In station buildings, instead of walls, it is permissible to use curtains/screens with a fire resistance rating of at least E
If it is not possible to install fire doors in the enclosures of elevator halls, then it is necessary to install screens with a limit of at least EI 45, automatically closing openings in the event of a fire.
The stage portal of a building of a cultural and entertainment establishment, with a hall with a capacity of 800 seats or more, is equipped with a fire-resistant gas-tight curtain made of non-flammable thermal insulation materials with a fire resistance of at least EI
Windows/openings of projection/control rooms opening into the auditorium are protected by curtains with a fire resistance rating of at least EI

In practice, manufacturers of curtains, as well as doors/gates, themselves develop the design, detailed technical conditions for the production of serial commercial products, and after passing full-scale tests for fire resistance and smoke and gas resistance, they receive the appropriate certificates of compliance with fire safety regulations. Without such documents, these curtains cannot be considered as fire-resistant products, but at best considered devices for protecting/draping building openings, while retaining heat well in the room.

Device and how it works

From the very beginning, it is necessary to distinguish between the following products: fire curtains and smoke curtains/screens.

The first are designed to fill openings, blocking the path of fire, intense heat flow, partially or completely combustion products into adjacent rooms; the second - to completely block or partially limit the spread of smoke flow.

The next difference: fire curtains completely cover the construction, technological/transport opening in the barrier, providing the fire resistance limit required by the standards. Smoke curtains/screens, also sometimes called curtains, can be lowered either completely; and the height of the smoke layer formed in the protected room, determined by calculation.

In addition, a fire/smoke curtain/screen, unlike a curtain, may not have side guides in the body of which the fire-resistant fabric moves. The protection of the opening is ensured by the calculated excess of the geometric dimensions of the canvas vertically and horizontally in relation to the area of the opening.

Example: clause 5.4.5 of SP 4.13130.2013 directly states that a fire curtain separating the stage portal of a theater with a number of seats of more than 800 must, when lowered, cover the construction opening from the sides by no less than 0.4 m, from the top by 0, 2 m, while ensuring gas tightness.

The design of a fire curtain consists of the main elements/parts:

Lateral U-shaped guides, made of galvanized or stainless steel, in which the blade moves down/up.
Cloth with a thickness of 3 to 7 mm, wound on a shaft. As a rule, it is a composite material made from heat-resistant fabrics, such as fiberglass, reinforced with metal thread. To impart additional properties, increase the limit of resistance to fire, exposure to high temperatures, a heat-reflecting and/or thermally active/rapidly intumescent coating is applied to the canvas. The heat resistance of various types of fabric reaches significant values - up to 1100℃.
One or more shafts, with a blade tightly wound on it, driven by an electric motor that lowers it. Roller blinds moving with an average speed of 0.1 m/s.
The electromechanical part is enclosed in a protective casing/casing made of steel, located at the top of the entire structure. In general, the appearance of a fire curtain is very similar to protective blinds that cover windows, doors of shops and offices located on the first floors of buildings at night. Only instead of stacked metal strips there is a reinforced fire-resistant fabric.
A lower tire filled with weights ensuring its weight is not less than 4 kg/p. m. This ensures the necessary tension of the canvas in all fixed positions, as well as during lifting/lowering.
Cloth clamps in raised/working condition.
A control unit connected to the building's alarm system to ensure automatic startup when an alarm is received.

In “standby mode,” the fire-resistant curtain fabric is rolled up inside the protective casing; usually only the edge of the bottom rail is visible, which does not spoil the appearance of the opening; familiar to staff and visitors, by analogy with the widespread security blinds.

When smoke, heat detectors, or flame sensors are triggered, a signal is sent to the control unit of the fire curtain, and it automatically begins to fall, closing the opening, while the lower heavy edge - the tire - ensures tight contact with the floor surface.

As a result of this timely limitation of the spread of fire that began inside the protected premises. Due to the natural decrease in oxygen content during the combustion process, the lack of fresh air flow, the release of a large amount of gaseous products, and a decrease in temperature, the fire often goes out on its own. In other cases, even a fast-growing fire is not able to overcome such a seemingly not very serious obstacle.

The most common fire curtain EI 60/EI 30 is supplied to customers. The specific choice depends on which product, with which standardized fire resistance limits for structural integrity, the ability to not transmit intense heat flow from a fire, are indicated in the specification of the design documentation. Typically, these indicators are quite sufficient to fill the majority of construction volumes in fire barriers.

Products with standardized fire resistance limits EI from 90 to 180 are much rarer, are usually made to order, and the most often cited examples of the possibility of their production by a company are an advertising ploy, which is only part of a campaign to attract customers/clients and nothing else.

Attention: sometimes, by mistake or as a result of intrusive but illiterate advertising on the websites of suppliers/intermediaries, fire curtains are sold as roller or sectional gates assembled from metal strips with thermal insulation filling, as well as curtains/screens assembled “in an accordion”, without side guides. Despite the external, some structural similarity, they are not fire curtains.

Features of choice

To do this, you need to clearly define and outline the scope of application of such products, which are intended for the following cases/purposes:

To protect large openings that cannot be filled with fire gates and doors.
Dividing into fire compartments huge in area, construction volume, complex in layout of public and industrial premises/buildings, including various train stations, shopping centers, warehouse complexes, museums, theaters, covered parking lots.

The advantages of choosing fire curtains as filling in fire barriers include the following:

Using them, you can divide rooms or buildings into compartments, sections or zones of almost any configuration or area. For example, if the opening width exceeds 5–6 m, then the curtains are made of several overlapping panels, allowing you to reliably protect any opening - from the door to the portal.
The use of fire curtains has little impact on the interior design of the premises, especially since metal guides, protective casing and even the canvas can be painted to order in the desired color.
Unlike swing, sliding/sliding, lifting fire protection products, curtains do not reduce the usable volume of the room.
There are types of curtains with horizontal forced unfolding of fire-resistant fabric to protect large open openings in the floors of buildings, which gives architects and designers new opportunities to increase the volume of buildings without deviating from current fire safety standards.
The use of water irrigation, which is structurally part of the product, allows us to provide a reliable additional line of protection from fire and smoke.

Installation and assembly rules

products are mounted inside the opening, if its dimensions allow; or above the opening, in order to leave the passage/passage through it completely free.

Important: installation, maintenance, repair of fire curtains, as well as other types, types of filling of openings in capital barriers with a standardized fire resistance limit - gates/doors, valves, curtains/screens, hatches, can only be carried out by specialized enterprises/organizations that have the appropriate license Ministry of Emergency Situations.

Practice, coupled with statistics, convincingly shows/proves that doing things on your own in such serious issues related to the safety of people in buildings is often too expensive.

Considering that there are different types of fire curtains, finding the best option from finished products of standard sizes or ordering a non-standard product for your premises/building, concluding an installation agreement, servicing the customer will not be difficult and will require a minimum of time spent.

According to SNiP standards, fire curtains must be present at all industrial and manufacturing enterprises, as well as in crowded places (shopping centers, offices, train stations, museums, theaters, etc.).

These products are designed to localize fire and divide the room into compartments in the event of a fire. The need for their installation is regulated by Art. 37 and 88 Federal Law No. 123 of 2008.

Purpose of fire curtains

Fire-resistant roller blinds are necessary to stop the spread of fire and smoke.

Installation of such products increases the time the fire engulfs a room, so people can evacuate from a dangerous place.

Varieties

Fire curtains look like fabric roller blinds that are lowered when a fire occurs.

The main types of fire curtains: fire retardant and smoke retardant. There are designs that provide for irrigation.

Such products provide irrigation in the form of a water curtain in front of the curtain. Water consumption on average is 7 – 7.5 liters per minute per 1 sq. m. of canvas.

Products without irrigation are installed in rooms where there is a need for a barrier against toxic and harmful fumes.

Fire retardants are made of reinforced fiberglass. Such products can prevent the spread of fire for 2 hours.

Smoke screens

Smoke protection sheets are necessary to regulate the direction of the smoke flow.

The main purpose of the curtain is to stop the spread of smoke throughout the hall and penetration into adjacent rooms. They are made from a special woven fabric.

Smoke protection sheets are installed in blocks. They protect emergency exits, but at the same time do not prevent people from passing through them.

What's the difference

Fireproof when lowered are designed to fill openings and close the path of the flame, that is, to completely block the spread of fire.

Smoke screens are lowered both completely and partially, that is, to the height of the smoke layer.

The second difference between fire-retardant sheeting is that it may not have side guides.

Material of manufacture

Fire curtains are made from innovative technological material that can withstand exposure to fire for up to 3 hours.

The canvas is safe for human health; during smoldering and burning it does not produce toxic materials or fumes. The material for the manufacture of canvases is impregnated with a special fire retardant compound.

The main components of matter:

Fiberglass fabric.
Polyester non-flammable fiber.

The thickness of the material ranges from 3 to 7 mm. The heat resistance of the material used to make fire-retardant sheets can reach 1,100 degrees.

Products with fire resistance class EI – 120 are reinforced with stainless wire. In some models, non-flammable fabric fibers with fire retardant impregnation are used instead.

Dimensions

All structures operating in automatic mode consist of the following elements:

Box
A cloth wound around a shaft.
Guide rails.
Bottom bar.
Electronic part.

The electronic part contains the fire curtain control unit: motor, battery and control system. Today, canvases are most often made to order based on the size of the room.

Fire curtain sizes:

Maximum width – 21,000 mm.
Maximum height – 8,000 mm.

Standard dimensions of the box where the shaft is located:

Height – 260 mm.
Depth – 211 mm.
Width – up to 21,000 mm.

Standard guide rail sizes:

Height – up to 8,000 mm.
Depth – 64 mm.
Width – 112.5 mm.

Control

There are curtains with automatic and mechanical control. Today, designs with automatic operation are most often used.

When the fabric is turned, the cut-off tire is activated, which ensures tension of the fabric and full contact with the floor. Fire curtains are controlled using remote control panels.

To operate automatically, the structure must be connected to a fire alarm system. During a fire alarm, the canvas opens itself in approximately 10 - 15 seconds.

Automatic curtains open automatically when the room temperature rises.

The design is equipped with special thermal sensors, which, when the temperature rises, turn off the electromagnets holding the fabric. The material sinks under its own weight.

If the curtain has water irrigation, it turns on automatically. Water is necessary for the cooling effect. Water spray is present in curtains with fire resistance class EI 45 and 60.

According to the standards, for the product to function properly, it must be checked regularly and the battery charge level must be monitored.

Basic rules for installing the structure

The structures are installed on:

Gates and doorways.
Lift gates.
Window openings.
Ceilings.

Installation is also possible on building facades, provided that they are located close to each other.

Minimum dimensions for installation:

The main space is 25 cm.
Lateral space – 10 cm.

Installation of fire curtains should only be carried out by a qualified specialist who has a license from the Ministry of Emergency Situations. The structure must be connected to a fire sensor and alarm system.

Service

Fire curtains should be serviced at least 2 times a year.

Maintenance involves checking:

Product performance.
Curtain fabric for damage.
Possibility of structure failure.
The control unit for operability.

After inspection, inspection certificates are issued.

Technical requirements

Basic technical requirements for fire-resistant fabrics:

Thickness – not less than 0.7 mm.
The weight of the matter is 0.7 kg per 1 sq. m.
The weight of the entire structure is 30 kg per 1 linear meter of canvas width.
Motor power supply voltage is 24 V.
Width – no more than 20 m.
Height – no more than 8 m.
The screen lowering speed is 0.15 meters per second.
Service life – 70,000 operations.

The design should have a button to raise the screen when evacuating people from the premises. All products must have certificates of conformity.

Need for installation in residential premises

Many people are interested in the question: is it necessary to install fireproof curtains on windows in residential premises? Experts assure that if people have such an opportunity, then it is better to do it.

If finances do not allow you to install these structures on all window openings, then it is better to mount the product in the window opening in the kitchen.

This room is the most likely to cause a fire. Fires from curtains often occur.

Conclusion

Fire curtains are a necessary element in fire safety. They protect against the spread of fire and smoke, do not reduce space, and fit harmoniously into any design without disturbing the overall picture of the interior. The structures are made individually for each enterprise or room, but you can also buy ready-made ones.