Processing of metal structures by fire retardant composition. The process of fire retardant treatment. The effectiveness of protection depends on the thickness of the coating
In connection with the frequent fires of objects and according to the standards for processing them with special fire-protection compounds, it is necessary to provide for all treatment methods that rely on the class of building protection.
To do this, you need to contact the organization that provides preventive measures to protect buildings and structures. Often, specialized services or construction organizations that have special admission to this type of work are engaged in this.
Technical operation and management of objects
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Even metal rolling does not have sufficient strength at high thermal impact and fire.
In order for a building or any structure to withstand the effects of high temperatures, which may occur during a fire, preliminary flame retardant treatment of the metal is necessary.
What is the treatment for:
Support for administrative operations
Reception, security, control of movement of visitors, on-site parking control, registration service, etc. Provision of telecommunication services, rental of office equipment, etc. system of attendance, information technology, electronic travel book.
Deratization - disinfection - disinfection
Rodent control - Insects - Microorganisms Residential buildings Offices Halls and shops. . These services are carried out after careful consultation and in accordance with customer requirements, which show the frequency and duration of the services performed. Cleaning works are carried out by trained and thoroughly studied workers. Modern methods of cleaning and cleaning are available.
- Ensure the strength of metal structures, prevent their destruction.
- Protects equipment and walls from damage by open fire.
- Increase the level of fire safety of the facility.
- It will be possible to extend the time of evacuation of personnel.
- Will prevent the spread of fire and make the fire local.
- Minimizes the cost of restoration after a fire.
- Ensure a minimum risk of EMERCOM employees when extinguishing a fire.
Height of work using the technique of climbing
Interior finish External painting Surface treatment of wood and metal structures Painting of concrete floors Auxiliary and finishing works. Cleaning the facades Removing snow from the roofs Cleaning the strawberry rice Risk of cutting down trees.
Occupational safety and health
Assessment of occupational risks of potential health and safety risks for employees. Processing directives for the provision of personal protective equipment and cleaning, cleaning and disinfection. Development of guidelines for the organization and management of occupational safety and health. Processing of documentation in accordance with the requirements of the current legal standards for ensuring occupational safety and health. Record of occupational injuries. Performing inspections to ensure compliance with applicable occupational safety and health standards. Providing supplies of new fire extinguishers in accordance with the fire documentation of the facility.- Maintenance of lawns, bushes and green areas Dangerous tree felling.
- Development of a proposal for the classification of jobs.
- Processing of working rules.
- In addition, inspections and audits of fire hydrants and dryers.
Reliability of this preventive measure
Fireproof paint, paste - already proven way to protect the surface, so many customers choose it. It is quite simple in execution, however it is necessary to correctly execute the whole chain of work.
The paint should be of a certain thickness, which can then be measured by specialists.
The effect of high temperatures reduces the yield strength and, consequently, the bearing capacity of the building structure. When the steel is heated to about 500 st. During the fire test, structures are loaded with different curves. Thinner elements overheat across the cross section faster than solid elements.
The effect of the "massiveness" of the cross section on the overall fire resistance of the structure is expressed. There are more opportunities to protect steel structures from the effects of fire. Create static stocks so that the design temperature is reached on time.
The more a layer of special paint, the higher the fire resistance of this object. On average, the price for fire protection depends on the volume of work and the brand, the manufacturer of these materials. And also on the number of layers of the applied paint on the surface.
Do not economize on quality, because at stake are not only the protection of structures from damage, but also human lives.
Technological process and subsequent finishing. Fusible paint - retain a completely visible steel structure. The application is also due to the temperature and humidity in the work area. Fire extinguishers Fire hydrants Fire-resistant Fire-protective coatings and tiles Fire valves Fire safety of buildings Fire inspection door.
Provide a reliable partner for fire protection, fire safety and other fire protection services. Over the years of our business, we have received many satisfied customers and regular partners, with whom we have been cooperating for a long time. Throughout our business, we stick to the motto.
Methods of fire protection
Depending on the standards and requirements for fire safety, a method for protecting metal structures from fire is chosen. It can be carried out in one of the listed ways, and can combine several of them.
Offer services in the field of fire protection
"Your safety is our satisfaction." Look at the range of services provided by fire safety and fire safety of buildings. If you are interested or have any questions, do not hesitate to contact us. Do you need audits, repairs, maintenance of fire extinguishers, hydrants, fireproof valves? Then do not hesitate to choose the right partner and contact us! A complete list of all services provided by the fire protection service.
Prevent the risk of fire and the effects of fire in buildings. Ensure the safe evacuation of people from the building! Determine the state of construction in terms of fire resistance. We have many years of experience and offer comprehensive services in the field of building fire safety. Read the full list of services that we offer in the field of building fire safety.
What are the methods of fire protection:
- Concreting or facing with bricks - in the reconstruction of the building to enhance its load-bearing capacity.
- Plates and screens with lining - to protect places that require high aesthetic qualities.
- Plasters - on structures with a simple configuration.
- Lightweight inorganic coatings - on ceilings with weight restrictions and provide a fire resistance limit of 1, 5 hours.
- Composition of thermoexpanding type - on any metal constructions of different configurations the fire resistance limit is up to 1 hour.
If you solve any problem in the field of fire protection or have a question, do not hesitate to contact us. All services are provided on a professional basis. Threats increase, unite, create new ones. The higher the fire extinguishers, the harder it is. Evacuation of more than 8 floors is not only very difficult, but also time-consuming.
For people in flaming buildings and crews who came to the rescue, time is the greatest enemy. The most important factor that should be considered by designers and designers when creating their work is the time that should be provided for the evacuation of all people, including the victims. This is the time before the building must maintain the limits of its components at the design level.
Existing methods of fire protection are listed above, but the most effective and common of them is coating with a thermoexpanding composition. It does not form toxic compounds, does not release harmful compounds when heated. The coating is intended for the protection of enclosed spaces at temperatures from -50 to +60 and humidity up to 85%.
Steel structures: Eiffel Heritage
On the contrary, during a fire, the most important parameters of threats are time and temperature. The impact of high temperatures is as important as its value, and they have to deal with death and material damage. The Eiffel Tower did not take long to get to the skyscraper. These buildings, like many other high-rise buildings, were built in steel construction. Since then, the race is running, who and where will put the tallest building.
Reliability and safety of construction
The basic requirements for the reliability of the structure were formulated by the International Committee. Accordingly, the structures and components should be designed in such a way that they can with a sufficient degree of reliability. Resist the actions that may occur during construction and use; correctly behave under normal conditions of use; Maintain structural integrity in the event of an accident, such as fire, explosion or local damage. These requirements must be met during the intended use time of the structure, therefore the structures must be designed and maintained in the environment in which they operate in order to meet the following conditions: - they have a sufficient shelf life, ie deterioration of the material properties should not result in too much construction will not succeed during use; - were economical in the consumption of materials, energy and human labor, as well as built-up spaces and construction terms. - take into account the consequences of the disorders of people's lives and health, the number of people who are at risk in the event of an accident, material and social losses, and whether sudden or uncontrolled destruction or "brute force" can give a chance for salvation.
The coating can be applied without varnish coating, but on a clean and degreased surface with a brush, roller or evenly spray gun.
What is treated metal structures
Several types of processing are used to protect metal structures, for example:
- Heat-insulating plaster. It does not support combustion and will perfectly protect the surface from heat and open fire.
- Coverings from asbestos. They have long been used as a protection against overheating. Previously they were wrapping metal chimneys.
- Facing with special incombustible materials - fire retardant screens.
- Application of special paste, paint, coating on the metal surface.
To better protect the structure from fire, several methods of protection can be used at once.
Murphy's law says that if a structure can collapse, it will certainly destroy it. Considering this fact and the fact that steel structures serve to support and form first of all: large and widespread warehouse, production and commercial halls, high-rise and high-rise office and residential buildings, you can see how to apply powerful requirements to designers, materials, contractors and later users. All these elements contribute to the reliability of the structure.
Types of steel structures in accordance with the criterion of designation
Their most popular destination is storage, production or large-scale trade. Structures of high-rise and multi-storey buildings. Steel, as a material for the construction of tall or multi-storey skeletons, has many advantages. The higher the building, the higher the risks arising mainly from.
So, in shopping malls, in addition to covering ceilings and floors, protective screens are used to block the spread of fire and localize the place of fire.
The effectiveness of protection depends on the thickness of the coating
You can not be instructed to apply this coating to an ordinary painter, since the uniformity of applying fire protection and the full study of all joints and cavities are of great importance.
The weight of your building; effect of the sail under the influence of wind on large vertical planes; great problems with the evacuation of people on site, and the carrying out of rescue and fire prevention measures in them; a large number of people who are not familiar with the topography of the building and the possibilities of evacuation; terrorism. During our research, it turned out that our ambitions and the desire to overcome barriers are contrary to human ruthlessness and irresponsibility. On the one hand, visionaries in the form of architects and investors, on the other hand, carelessly and try to save the perpetrators, their supervisors and terrorists who see in such buildings as an excellent means for propaganda of their business.
To do this, you should contact a company that has specialized tolerances for this work.
About 1 mm - 4 group protection time 45 minutes. 5 protection group 30 minutes at a coating thickness of 0, 6 mm. This is a special water dispersed paste based on ammonium polyphosphate.
The drying time between the layers is not less than 12 hours. Total drying time from 10 to 15 days. The coating service life is not less than 25 years.
Mechanical and wear-resistant characteristics of steel in fire conditions
The most important element is the definition of the limit point, the elements of which can not exceed the elements of steel structures, since the consequences of such an event are irreversible for the consequences of construction. In the conditions of fire metal structures undergo unfavorable changes. When heated, the elements are deformed, as their rigidity decreases. At the same time, thermal expansion in the case of statically indeterminate structures causes additional internal forces of considerable significance.
How is fire protection done?
For work, special equipment is used, which allows coating with a layer of a certain thickness. Other materials are used, such as plaster, paste, screens and concrete.
Therefore, it is especially important to analyze the bearing capacity and in this state of stability loss. Unlike reinforced concrete and wood, steel structures relatively quickly reach high temperature values throughout the site. In the second part, among other things, fire retardant coatings of steel structural components, as well as the cost and durability of protection.
Silicate-cement slabs. The possibility of connecting the lining details to the lining leads to a short assembly time. No additional substructure is required. Mineral wool plates. These boards are extremely flame retardant and extremely resistant to mechanical influences.
How fire protection works in case of fire
When a fire occurs or the temperature rises, the paint that is covered in the structure will swell, forming a foam. The thicker the paint, the more dense the foam, and, therefore, the protection of the structure is more reliable.
Stages of work
So, when choosing a thermoexpandable coating, it is necessary:
- Preliminary to clean up the bearing areas from corrosion and discharge, the surface is degreased.
- After that, the customer chooses the thickness of the applied coating and the masters begin to work. If the layer needs to be applied more than 1 mm, the coating should dry for 12 hours, after which another coating layer is applied.
The thicker the coating, the greater the fire resistance of the structure, and the longer hours it can withstand open fire.
Cost
The cost of fire protection depends on the material from which it is made and the area to which it is applied.
For the preparation of the area to cover the prices can be from 250 rubles per square meter of area.
Spraying by airless method of special composition, depending on the fire resistance limit, ranges from 400 to 1,250 rubles.
A coating of special plaster composition from 600 to 15,500 rubles per square meter.
Quality checking
Inspection of the processing of the structure is carried out at least twice a year by special services in accordance with the instructions of the manufacturer's factory. For this, a special PMP-1 device is needed. The prices for this check are quite high. Therefore, if there is an opportunity, it is better to conduct the processing of metal structures from a fire in addition, it will cost much less.
Normative document
To find out what class this building belongs to, you can use the table 22 of Federal Law No. 123. This will help to know what density coating should be applied, and whether additional protection measures are needed.
The advantage of ordering fire protection from a specialized company:
- Individual approach to the client.
- Acceptable prices and discounts.
- Qualitative processing of any volume of premises.
- Operative performance of work.
The faster the building will be treated with special fireproof material, the safer it will be. Do not risk with fire, protect your property and yourself from unforeseen situations.
Kind time of the day, my friends and readers of my blog. Anyone who is interested in the topic of fire safety knows that it is much easier to prevent a fire than to fight it. There is a mass of technologies, how to protect your property, production base and protect people's lives from a fire. Therefore, in today's article, I will tell you what is the fire-prevention treatment of metal structures and how effective it is.
Even if you think that by installing metal doors, stairs and structures, protect the building from spreading the flame, then you are deeply mistaken. Yes, metal refers to noncombustible solid bodies, however, with prolonged exposure to high temperatures, it begins to melt and deform.
To avoid unpleasant consequences and to protect the material part as much as possible, it is necessary to process not only fabric, material, wooden surfaces, but also metal structures.
But let's talk about everything in order.
Fire retardant treatment of metal includes a whole complex of measures and technologies, the purpose of which is to create maximum protection of the surface from destruction at high temperatures. This is achieved by applying a special refractory chemical composition that creates a reliable heat-insulating layer and prevents deformation of the metal elements during combustion.
Requirements for the protection of metal structures are imposed by SNiP and they are expressed in the degree of refractoriness and time during which the metal structure will withstand high temperatures without deforming or breaking down.
Experts classify 5 fire resistance groups of structures:
- Over 2.5 hours of exposure to a temperature of 500 0 C;
- 120 minutes;
- 60 minutes;
- 45 minutes;
- 30 minutes.
How do treated metal structures behave during a fire?
One of the serious threats to the building during a fire is the destruction of metal structures, which are the backbone and, deforming, can lead to large-scale destruction of the entire building.
How to solve this problem? There are 2 main ways:
- Do not dispose of combustible materials in the immediate vicinity of the metal. Even if the structure is coated with the highest degree of refractory paint, the presence of combustible materials near it can significantly reduce the effectiveness of protection. All this is thought out at the design stage. Specialists conduct an audit, calculating the weakest points and potential threat to metal structures, developing measures to eliminate them.
- Technical solutions. Today, there are many technologies to provide effective fire protection, including treatment with special paints, wireframe protection and much more.
The degree of fire resistance of structures is affected not only by high-quality processing with fire retardant composition, but also by the technology of erecting the building. Specialists during construction must ensure maximum protection of metal elements against corrosion, decay, deformation.
Technology of metalwork processing
Processing of metal elements with a special protective coating takes place at the factory, at the stage of coating with an anti-corrosion coating. Depending on the category of the room, the metal elements are covered with a composition with different degrees of fire resistance.
Also, the degree of refractoriness and composition of the mixture is influenced by atmospheric factors. If the metal is intended for the construction of industrial premises, which will be directly affected by weather conditions, the specialists use a special winter protection for processing.
The duration of the fire retardant film is not less than 20 years. Although this parameter can be influenced by a number of factors: the negative impact of the environment, the low qualification of the brigade that conducted the treatment.
Many, probably, are interested in the question, and what will happen if you still do not handle the design? A metal element not treated with a special refractory composition will lose its solid properties within 25 minutes after exposure to a temperature above 500 ° C.
What should be "protected"?
According to the requirements of SNiP, all supporting, nodal and load-bearing beams of a building structure must undergo fire protection.
- Stair flights;
- Headscarf;
- Support columns;
- Reinforced concrete partitions;
- Running.
Choose the method of processing
The parts are treated with paints, primers, varnishes and special impregnations, which create a reliable film.
The most affordable way is to process pasta and plaster. The downside is that the paste increases the weight of the structure, which is not always permissible.
Paint or varnish is a more expensive but effective material that gives the maximum degree of protection. Average fire resistance when applying a special lacquer - 60-90 minutes.
Multi-complex solution (plaster + paint) - reliable protection, which will increase the fire resistance limit to 2.5 hours.
Do you want to maximize the protection of the erected building? Do not forget about the fire treatment of wooden structures, which will allow you to buy time to call the rescue service and evacuation of people.
Often, negligent developers, wishing to reduce the price of construction, do not comply with the requirements of the SNiP and order a fire-resistant coating of metal structures that does not correspond to the type of the building. All this information is reflected in the technical and project documentation, which can be easily verified.
Despite the relatively high price of fire retardant work, the frequency of the procedure is approximately 1 time in 20-25 years.
If you want to study this topic in more detail, I recommend that you familiarize yourself with point 21 of IDR No. 390 of April 25, 12, which regulates the norms of fireproof coatings of premises.
I hope this article was not useful for you. Subscribe to the news so as not to miss the useful and to be aware of the changes in the Fire Safety Rules, share comments and links in social networks.
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