Permissible deviations for semi-dry screed. Checking the floor or screed for light. Regarding the conditions of work and items included in general prices

Floor screed is a thin durable layer in multi-layer building structures, designed to absorb and transfer loads (for example, from those on roofs, cargo, equipment) to the underlying layer of heat or sound insulation. They are used when the underlying layer is insufficiently rigid to create a flat surface that allows for the laying of overlying layers (roof waterproofing or surface covering). There are monolithic (cement-sand, asphalt concrete, etc.) and prefabricated, in the form of thin (4-5 cm thick) slabs of gypsum cement or expanded clay concrete (industrial). (Great Soviet Encyclopedia)

Floor screed is a layer of components building materials different types, is performed as an intermediate structure between the base and finishing coat, they can be porcelain tiles, laminate, parquet, linoleum, polymer coating and others.
Without exaggeration, we can say that the screed is the basis for the above decorative coatings as well as the foundation for a house. The better the screed is made, the better; the screed should be strong, even, without cracks. This is a guarantee that fine coating will last longer and will not crumble during use.

Floor screed has many design options and a wide selection of materials for its implementation, depending on the conditions, location of implementation, intended use, characteristics of the building/floor structure, and the presence of utilities.

Let's consider options for the most common methods of surface preparation.

Floating screed
Conventional screed (contact, monolithic)
Prefabricated structure

Screed on polyethylene film 100 microns floating screed

A floating screed is not a literal term; a floating screed is separated from the base in its simplest form and serves polyethylene film. The technology service we provide is carried out according to this principle. semi-dry screed using German technology. The purpose of creating such a design is to prevent adhesion of the solution to the surface, lack of adhesion; the floating screed is independent, resistant to vibrations of the base and in contact with the walls. The absence of direct contact with the surface, i.e. during movements (buildings, houses, structures), sudden changes in temperature, humidity, preserves the integrity of the structure from cracks. Floating is also used in thermal insulation structures (water-heated floors), sound insulation materials (EPS) polystyrene, polystyrene foam, mineral boards, expanded clay, foamed polyethylene, etc. Listed below possible materials It also works to lighten the weight of the “pie” and significantly reduce the load on the floors.

Regular screed (classic liquid). The most common version of the device. It's regular liquid cement-sand mixture, laid on floor slabs, monolith, without underlying layers.
This method can also include “self-leveling floors” made from self-leveling mixtures. This method is best used where there is already a surface with deviations in the plane, differences, or where the task is to raise the floor level by a small thickness of up to 2-2.5 cm. It is better to level the floor with a “self-leveling floor” of more than 1.5 cm using installed beacons and tighten it with a fork along using the conventional liquid method, since self-leveling mixtures do not level themselves into a perfectly flat horizon.

A prefabricated structure is a method of constructing elements and parts using an assembly method, without wet processes. Prefabricated floors are made from sheathing of a supporting rigid frame along joists, bulk floors using Knauf technology with fine expanded clay bedding and GVL sheets called Knauf-Superpol. Prefabricated floors are raised floors, leveling the floor and raising it to a height is achieved with height-adjustable fasteners and stud supports. In all prefabricated floors, the plane is created by materials such as OSB, DSP boards, boards, chipboards, etc.

Standards SNiP "Floors" SP 29.13330.2011 Floors. Updated version of SNiP 2.03.13-88

CODE OF RULES FLOORINGS
The floor
Updated version of SNiP 2.03.13-88

5. SCREAD (BASE UNDER THE FLOOR COVERING)
5.1. Screeds should be used in cases where it is necessary: ​​leveling the surface of the underlying layer; covering pipelines; distribution of loads across heat and sound insulating layers; ensuring standardized heat absorption; creating a slope in floors on ceilings.
5.2. The minimum thickness of the pie for the slope in the places adjacent to the drains, channels and ladders should be: when laying it on floor slabs - 20, on a heat- or sound-insulating layer - 40 mm. The thickness of the layer for covering pipelines should be 10-15 mm larger diameter pipelines.
5.3. Screeds should be used: to level the surface of the underlying layer and cover pipelines - from concrete with a compressive strength class of at least B12.5 or cement-sand mortar with a compressive strength of at least 15 MPa (150 kgf/cm2); to create a slope on the floor - from concrete of compressive strength class B7.5 or cement-sand mortar with a compressive strength of at least 10 MPa (100 kgf/cm2); for liquid polymer coatings— from concrete with a compressive strength class of at least B15 or cement-sand mortar with a compressive strength of at least 20 MPa (200 kgf/cm2).

5.4. Lightweight concrete, made to ensure normal heat absorption, must correspond to class B5 in terms of compressive strength.
5.5. Strength lightweight concrete the bending strength for screeds laid over a layer of compressible heat or sound insulating materials must be at least 2.5 MPa (25 kgf/cm2).
5.6. For concentrated loads on the base of more than 2 kN (200 kgf), the heat- or sound-insulating layer should be concrete layer, the thickness of which is determined by calculation.
5.7. The strength of gypsum (in a dried to constant weight state) should be, MPa (kgf/cm2), not less than:
for self-leveling polymer coatings - 20 (200)
“rest” - 10 (100)

5.8. Structures made from particle boards, cement particle boards and gypsum fiber boards, from rolled gypsum concrete panels based on gypsum-cement-pozzolanic binder, as well as from porous cement mortars should be used in accordance with albums of standard parts and working drawings approved in the prescribed manner.
5.9. Structures made of wood-fiber boards may be used in structures to ensure regulated heat absorption by the surface of the first floors of residential premises.
5.10. Asphalt concrete screeds may only be used under coverings made of piece tongue-and-groove parquet.

Excerpts from SNiP related to floor screed.

STRUCTURE DEVICE

4.15. Monolithic screeds made of concrete, asphalt concrete, cement-sand mortar and prefabricated screeds made of wood fiber boards must be made in compliance with the rules for constructing coatings of the same name.

4.16. Gypsum self-leveling and porous cement screeds must be laid immediately to the calculated thickness specified in the project.

4.17. When installing screeds, the requirements must be met table. 17.

SOUND INSULATION DEVICE

Floor soundproofing device

4.18. Bulk soundproofing material (sand, coal slag, etc.) must be free of organic impurities. The use of backfills made from dusty materials is prohibited.

4.19. Gaskets must be laid without gluing to the floor slabs, and slabs and mats must be laid dry or with gluing on bitumen mastics. Soundproofing pads under the joists must be laid along the entire length of the joists without breaks. Tape spacers for prefabricated screeds of the size “per room” should be located in continuous strips along the perimeter of the premises close to the walls and partitions, under the joints of adjacent slabs, as well as inside the perimeter - parallel to the larger side of the slab.

4.20. When installing floor soundproofing, the requirements in the table must be met. 18.

Often, laying floor coverings and installing floors is done based on personal considerations, as well as expediency. But in fact, the basis of the design of floors and screeds should be normative document, which regulates the main technological processes. These documents are constantly used in the construction and design of buildings, but also House master must know the requirements set out in SNiP, because floors and screeds have a serious scope of requirements. Let's look at the most basic ones.

Floor screed according to SNiP

When it is necessary to prepare a concrete slab for a decorative floor covering, a floor screed is done. There is also a separate section for this in SNiP. If you familiarize yourself with the requirements, recommendations and standards, the result is the most stable and durable foundations.

Naturally, these standards are mandatory only for capital construction projects, but many are guided by them for home repairs.

Determining the screed function

If you look at the building regulations, a floor screed is a layer of mortar based on sand and cement, which is poured onto the base base. Main function screeds - to form the most even base for the future finishing flooring. The standards also provide for such a floor screed device to ensure a sufficiently high strength of the base against mechanical damage. SNiP specifies all the necessary standards.

Documentation

Subfloors should be designed according to special regulatory documents. Previously, SNiP 2.03.13-88 was considered the main document on rough concrete foundations. However, despite the fact that floor installation techniques in residential buildings have not changed, new materials and construction technologies, because the standards have changed.

Today the document SP 29-13330-2011 is in force. It updates the edition of the standards for flooring.

Requirements for the screed device

The requirements for floor screed, which are provided for in SNiP, make it possible to obtain a high-quality foundation. It is better to use these standards and requirements in the project for your apartment.

Thus, the minimum layer thickness when laying on a concrete base is 20 mm. If an additional insulating layer or soundproofing materials are laid, the thickness will be 40 mm. If a pipeline or other communications are installed in the screed, then the layer above the communications should be no less than 20 mm.

If compressible materials are used as heat or sound insulation, then the strength of the sand and cement fill is increased. It should be no less than 2.5 MPa. In this case, the thickness of the screed should prevent any deformation.

The minimum strength of the solution is 15 MPa, and if the decorative finishing layer is a polyurethane self-leveling floor, then the strength is made equal to 20 MPa.

If a self-leveling mixture is used, with the help of which it is formed smooth surfaces, then the thickness of the layer of this coating should be no less than 2 mm.

To control the plane of the coating, the regulations provide for the use of a rule. If it is necessary to check the geometric characteristics of the layer, use a tool 2 m long.

According to SNiP, it is allowed if the floor screed has deviations, but not more than the specified values:

• For parquet, laminate, linoleum and self-leveling floors on polymer mixtures, 2 mm by 2 m is allowed;
• For other types of coatings, up to 4 mm per 2 m is allowed.

When performing surface control, deviations from these standards are leveled out first, since they have big influence on how well the finishing floor covering will be laid.

Technologies and general requirements for the basic foundation

Before laying the sand-cement layer, prepare the base. There are special recommendations for this in regulatory documents.

Thus, the foundation should be planned according to the profile or marks in the design documents. If it is necessary to add soil, the layer is compacted and leveled as much as possible. A mixture of sand and gravel is often used as backfill.

If floors are laid on the ground, then work can only be done when it thaws. If the soil surface is weak enough, replacement or additional strengthening is required. It is recommended to strengthen with crushed stone with a fraction of 40-60 mm. In this case, the strength must be no less than 200 kgf/m2.

If as a base concrete slab, then it is cleaned of debris and dust. Then the surface is washed with water. If there are joints between the slabs, they are filled cement-sand mortar. In this case, the filling depth must be no less than 50%. For these purposes, a solution of grades 150 or more is used.

Materials

• Sifted sand;
• Cement from M150 for industrial premises and M300-400 for residential premises;
• Gravel and crushed stone with a fraction from 5 to 15 mm. The strength indicator should be from 20 MPa.

Reinforcement

Floor screed reinforcement is used to give the structure greater strength. SNiP recommends the following materials:

• Wire mesh with a cell of 100×100 or 150 mm;
• Mesh made of polymer materials;
• Frame made of twigs;
• Fiber reinforcement – ​​fibers of steel, polypropylene, basalt.

This procedure is necessary where the height of the screed is more than 40 mm. For residential premises where there is no high load on the floors, screeds up to 70 mm are not reinforced.

The placement of reinforcing materials is carried out on preparatory stage. To ensure that the reinforcement fits correctly, special plastic supports are used.

Screed pouring technologies

The base base is processed according to all the previously described recommendations. Then you need to treat the surface with primers. After the primer composition has sufficiently polymerized, prepare cement mortar in a ratio of 1:3, where 1 part is cement and 3 parts sand.

If sound or heat insulating materials are used, then a damper tape with a thickness of 10 to 25 mm is installed around the perimeter of the room. Also, beacon slats are installed on the floor, and then the screed is poured.

The floor will be ready no earlier than in 24 hours. You should not walk on the base with your feet. At large quantities It is better to give the screed 30 days. Then you can begin sanding and laying the topcoat.

The structure of building regulations, which include SNiP for floor screed, is currently being formed as follows: the basis is the federal law “On Technical Regulation” (No. 184-FZ of December 27, 2002). This is followed by the federal law “Technical Regulations on the Safety of Buildings and Structures” (No. 384-FZ of December 30, 2009).

Its rules apply in mandatory, because they define the conditions safe design, construction and operation of buildings and structures. Its provisions are of a framework, general nature. The relevant parameters are clarified through the publication and application of construction rules or the updating of old ones adopted during the existence of the USSR. At a certain stage, difficulties arose in understanding which SNiPs (currently called codes of practice) should be used without fail. For this purpose, on June 21, 2010, the government of the Russian Federation published a list of standards and construction rules (in whole or in part), the application of which on a mandatory basis ensures compliance with the requirements of the technical regulations. In addition, another list was approved by order of Rostekhregulirovaniya (No. 2079 dated 06/01/2010). It includes rules and standards, the application of which in on a voluntary basis presupposes compliance with the terms of technical regulations.

Rules for flooring

The screed is an element general design floor. It is intended to create a smooth and durable base for laying flooring. It absorbs and distributes the loads that arise during the operation of the premises. In most cases, during the application cement strainer . Was put into effect on May 20, 2011 updated set of rules “SNiP 2.03.13-88 Floors” (see order of the Ministry of Regional Development of Russia No. 785 dated December 27, 2010). It replaced the previous rules, which were published back in 1988 (see).

By that time, a number of provisions of the previous SNiP of 1988 had already been included in the “mandatory” list approved by Order No. 1047 (we are talking about sections 1, 2 (clauses 2.1-2.5, 2.6-2.9), 3-7 of the old rules). It is expected that during the transition period, this list will be updated taking into account the new sets of rules (their content and structure). Until then, the old rules apply as long as they are mentioned in the government order, i.e. new joint ventures do not yet cancel the old SNiP (see Letter of the Ministry of Regional Development of Russia dated August 15, 2011 N 18529-08/IP-OG).

Agreed with clause 1.1 of the joint venture as amended in 2011, the rules apply to cases design floors Production the work itself on the manufacture of floors is carried out in accordance with SNiP 3.04.01 (see clause 1.4; in the text of the document, these rules are indicated without an index indicating the year of their adoption; now - 1987). These rules mostly regulate the conduct finishing works(they determine, in particular, the types of finishing, as well as the permits associated with them). However, the provisions are not included in the list provided for by Order No. 1047, i.e. their compliance is not mandatory.

The provisions of the updated set of rules that normalize individual indicators of screeds are provided for in Section 8 (old SNiP - Section 5). In particular, the rules define:

• purpose of screeds (clause 8.1);
• minimum layer thickness (clauses 8.2, 8.6, 8.7, 8.9);
• its strength;
• tolerances regarding angular deviations (clause 8.13);
• device conditions expansion joints(clauses 8.14 and 8.15).

Requirements for flooring

According to clause 8.13 of SP 29.13330.2011, the clearance between a two-meter lath and the surface of the screed should not exceed 2 mm for coverings made of linoleum, parquet, and laminated parquet.

In accordance with clause 4.24 of the old SNiP 3.04.01-87, the horizontal deviation of the screed should not exceed 0.2% (and in any case no more than 50 mm).

It should also be borne in mind that the design of the floor must correspond to the contents sanitary rules, and in particular to adequately ensure sound insulation of premises - in particular to prevent the spread of impact noise. For this purpose, “” technologies are used.

In the specialized section of our website you can also familiarize yourself with the rules of the device - both requirements and tolerances general, and standards defining manufacturing technologies individual species leveling layers.

SNiP for semi-dry floor screed

Recently, the technology of mechanized production of screeds, called “semi-dry screed” in Russia, has become widespread in the construction services market. This method leveling the base of the floor came to us from countries Western Europe together with the penetration of specialized mobile units designed for automatic preparation of the solution and its delivery to the work site.

There is no specialized SNiP for semi-dry screed. On general principles existing rules are applied: for the design of floors - SP 29.13330.2011, and for their manufacture - the not yet updated rules 3.04.01-87, which normalize the conduct of work on applying insulating layers.

The mandatory application of these rules is established on a general basis: only those provisions that are listed in a special resolution of the Government of the Russian Federation are mandatory.

There is currently no reference in the article on this topic.

• IN last years The technology of mechanized floor screeding, or, as it is also called, has become quite widespread in the market for apartment renovation services. semi-dry screeds. We talk about it in a separate article on our website. In preparation for its writing, we asked our engineers and craftsmen to summarize their accumulated experience in carrying out these works directly in Moscow and the Moscow region.

Notes

No notes found for this article. We regularly edit dictionary entries. It is possible that additional materials will be posted at this location soon.

Updated edition

SNiP 2.03.13-88

Official publication

Moscow 2011

SP 29.13330.2011

Preface

Goals and principles of standardization in Russian Federation are established by Federal Law No. 184-FZ of December 27, 2002 “On Technical Regulation”, and the development rules are established by Decree of the Government of the Russian Federation of November 19, 2008 No. 858 “On the procedure for the development and approval of sets of rules”.

Rulebook Details

1 CONTRACTORS - Central Research and Design Experimental Institute industrial buildings and structures (JSC TsNIIPromzdaniy) and LLC PSK Concrete Engineering

2 INTRODUCED by the Technical Committee for Standardization TC 465 “Construction”

3 PREPARED for approval by the Department of Architecture, Construction and Urban Development Policy

4 APPROVED by order of the Ministry of Regional Development of the Russian Federation (Ministry of Regional Development of Russia) dated December 27 No. 785 and put into effect on May 20, 2011.

5 REGISTERED Federal Agency for Technical Regulation and Metrology (Rosstandart). Revision of SP 29.13330.2010

Information about changes to this set of rules is published in the annually published information index “National Standards”, and the text of changes and amendments is published in the monthly published information index “National Standards”. In case of revision (replacement) or cancellation of this set of rules, the corresponding notice will be published in the monthly published information index “National Standards”. Relevant information, notices and texts are also posted in information system for public use - on the official website of the developer (Ministry of Regional Development of Russia) on the Internet

© Ministry of Regional Development of Russia, 2010

This regulatory document cannot be fully or partially reproduced, replicated and distributed as an official publication on the territory of the Russian Federation without permission from the Ministry of Regional Development of Russia

SP 29.13330.2011

Introduction…………………………………………………………………………………..………IV

1 Scope of application……………………………………………………….……...…1

3 Terms and definitions…………………………………………………………….…….…….2

4 General requirements………………………………………………………………………………2

5 Floor coverings………………………………………………………………………………5

6 Interlayer……………………………………………………………………….....10

7 Waterproofing………………………………………………………………………………….11

8 Screed (base for floor covering) …………………………….………..…….12

SP 29.13330.2011

Introduction

This document sets out requirements consistent with the purposes of Articles 7, 8, 10, 12, 22 and 30 Federal Law dated December 30, 2009 No. 384-FZ “Technical regulations on the safety of buildings and structures.”

The work was carried out by OJSC "TsNIIPromzdanii" (Prof., Doctor of Technical Sciences V.V. Granev, Prof., Candidate of Technical Sciences S.M. Glikin, Candidate of Technical Sciences A.P. Chekulaev) and LLC " PSK Concrete Engineering" (A.M. Gorb).

SP 29.13330.2011

SET OF RULES

Date of introduction 2011-05-20

1 area of ​​use

1.1 This set of rules applies to the design of floors for industrial, warehouse, residential, public, administrative, sports

and domestic buildings.

1.2 Floor design should be carried out in accordance with the requirements of Federal Law of December 30, 2009 No. 384-FZ “Technical Regulations on the Safety of Buildings and Structures” and taking into account the requirements established for:

floors in residential and public buildings– SP 54.13330, SP 55.13330 and SNiP 31-06;

floors in industrial premises with fire and explosion hazardous technological processes - in accordance with the requirements of the Federal Law of July 22, 2008 No. 123-FZ “Technical Regulations on Requirements fire safety"and provisions;

floors with a standardized indicator of heat absorption of the floor surface - SP 50.13330 and provisions;

floors made on floors, upon presentation of requirements for the latter

floors exposed to acids, alkalis, oils and other aggressive liquids - SNiP 2.03.11;

floors in sports facilities - SNiP 31-05 and recommendations , , ; floors in refrigerated rooms - SNiP 2.11.02; floors in warehouse buildings - SP 56.13330.

1.3 When designing floors, it is necessary to comply with additional requirements established by design standards for specific buildings and structures, fire safety and sanitary standards, as well as technological design standards.

1.4 Construction and installation work on the manufacture of floors and their acceptance into operation must be carried out taking into account the requirements set out in SNiP

1.5 These standards do not apply to the design of removable floors (raised floors) and floors located on structures on permafrost soils.

_________________________________________________________________________

Official publication

Regulatory documents referred to in the text of these standards are given in Appendix A.

Note – When using this set of rules, it is advisable to check the validity of reference standards and classifiers in the public information system - on the official website of the national body of the Russian Federation for standardization on the Internet or according to the annually published information index “National Standards” ", which was published as of January 1 of the current year, and according to the corresponding monthly information indexes published in the current year. If reference document replaced (changed), then when using this set of rules you should be guided by the replaced (changed) document. If the referenced material is canceled without replacement, then the provision in which a reference to it is given applies to the extent that this reference is not affected.

3 Terms and definitions

This set of rules adopts the terms and definitions given in Appendix B.

4 General requirements

4.1 Choice constructive solution flooring should be carried out based on the requirements of operating conditions, taking into account the technical and economic feasibility of the decision made in specific construction conditions, which ensures:

operational reliability and durability of the floor; saving building materials;

most full use strength and deformation characteristics of soils and physical and mechanical properties of materials used for flooring; minimum labor costs for installation and operation; maximum mechanization of device processes; environmental Safety; safety of people's movement;

optimal hygienic conditions for people; fire and explosion safety.

4.2 The design of floors should be carried out taking into account the operational influences on them, special requirements (non-sparking, antistatic, dust-free, evenness, wear resistance, heat absorption, sound insulation ability, slipperiness) and climatic conditions construction sites.

4.3 The intensity of mechanical impacts on floors should be taken according to Table 1.

4.4 The intensity of exposure to liquids on the floor should be considered:

small – insignificant impact of liquids on the floor, in which the surface of the floor covering is dry or slightly damp; the floor covering is not saturated with liquids; Rooms with water spills are not cleaned;

medium – periodic moistening of the floor, in which the surface of the floor covering is damp or wet; the floor covering is saturated with liquids; liquids periodically flow over the floor surface;

SP 29.13330.2011

large - constant or frequently repeated flow of liquids over the floor surface.

Table 1

The zone of influence of liquids due to their transfer on the soles of shoes and vehicle tires extends in all directions (including adjacent rooms) from the place where the floor is wetted: with water and aqueous solutions - 20 m, mineral oils and emulsions - per 100 m. Washing the floor (without pouring water and using detergents

SP 29.13330.2011

products and care products that comply with the recommendations of manufacturers of materials for the manufacture of floor coverings) and occasional rare exposure to splashes, drops, etc. does not count as exposure to liquids on the floor.

4.5 In rooms with medium and high intensity of exposure to liquids on the floor, floor slopes should be provided. The magnitude of the floor slopes should be taken:

0.5 – 1% – for seamless coatings and slab coatings (except for concrete coatings of all types);

1 – 2% – for all types of brick and concrete coatings.

The slopes of the trays and channels, depending on the materials used, must be no less than those specified. The direction of the slopes must ensure drainage Wastewater into trays, channels and ladders without crossing driveways and passages.

4.6 In livestock buildings, the slope of the floors towards the manure collection channel should be equal to:

0% – in rooms with grated floors and in ducts with mechanical cleaning manure;

not less than 0.5% - in rooms for keeping poultry in cages and in trays along the aisles in all rooms;

at least 1.5% - in the technological parts of the premises (stalls, stalls, machines, etc.);

no more than 6% - in premises for walking animals and poultry and in transitional galleries between buildings.

4.7 The slope of the floors on the floors should be created using a screed or concrete covering variable thickness, and floors on the ground - with an appropriate layout of the soil base.

4.8 The floor level in toilets and bathrooms should be 15 - 20 mm below the floor level in adjacent rooms or the floors in these rooms must be separated by a threshold.

4.9 Skirting boards should be installed where floors meet walls, partitions, columns, equipment foundations, pipelines and other structures protruding above the floor. If liquids get on the walls, they should be covered to the full height of the soaking. In the absence of expansion joints along the walls, aesthetic requirements and special requirements at technological processes flowing in rooms with low intensity of exposure to liquids, in places where floors adjoin walls, the installation of baseboards can be excluded.

4.10 There should be no voids in the design of the floors of premises for storing and processing products, as well as premises for keeping animals.

4.11 Floors in buildings must have the necessary bearing capacity and not be “shaky”. Deflections under a concentrated load equal to 2 kN in residential buildings, 5 kN in public and administrative buildings and corresponding to the loads in the technical specifications for the design of industrial and warehouse buildings, should not exceed 2 mm.

4.12 Floors in flat sports facilities exposed to medium and high intensity liquids (rain and melt water in open stadiums and playgrounds) must be equipped with a surface water and drainage system. To drain water from the territory

SP 29.13330.2011

flat structures, it must be given the necessary slopes, and devices for collection and disposal must be provided surface water as open system trays, closed system pipes and wells or a combination of open trays and closed drainage systems.

4.13 The slope of the floor covering in a flat open structure should be

4.14 The direction of the slopes should be:

- from the transverse axis (A) of the tennis, volleyball and badminton courts;

- from the longitudinal axis (B) or hip (C) - in courts for basketball, football, handball, etc.

4.15 In order to prevent injuries, trays and channels in the floors of open sports facilities must be equipped with lattice covers.

4.16 Floors in the halls game types sports (football, volleyball, basketball, tennis, etc.) must meet the following requirements:

shock absorption – no less than 53%; standard deformation (a parameter characterizing the amount of deflection of the coating

floor under impact loads at a point with a force equal to 1500 N) - not less than 2.3 mm;

factor W 500 (a parameter characterizing the deformation at a distance of 500 mm from the point of impact of the load) - no more than 15% of the standard deformation;

ball bounce – at least 90%; rolling pressure – not less than 1500 N.

4.17 Requirements for dust-free, even, anti-static and (or) non-sparking floors are established by the customer at the stage of the design specifications

With taking into account the peculiarities of the technological process.

4.18 Heated floors covered with ceramic tiles should

provide in areas where people walk barefoot - bypass paths around the perimeter of the pool baths (except outdoor swimming pools), in locker rooms, showers. The average temperature of the floor surface should be maintained within 21-23 o C.

4.19 Floors in refrigerated rooms with negative temperatures must be designed taking into account the need to prevent freezing of the soils that serve as the basis for the floors. For this purpose, artificial heating systems, a ventilated underground and other protection systems should be used in accordance with the requirements of SNiP 2.11.02.

5 Floor coverings

5.1 Type of floor covering production premises should be prescribed depending on the type and intensity of mechanical, liquid and thermal influences, taking into account special requirements for floors in accordance with the mandatory Appendix B.

The type of layer in the floors is indicated in Appendix D.

SP 29.13330.2011

The type of floor covering in residential, public, administrative and domestic buildings should be assigned depending on the type of premises in accordance with the recommended Appendix D.

5.2 The thickness and strength of solid covering materials and floor slabs should be assigned according to Table 2.

When placing pipelines in concrete coverings and laying them directly on the concrete base (without an intermediate screed to cover the pipelines), the thickness of the floor covering must be at least the diameter of the pipeline plus 45 mm.

5.3 The adhesion strength of coatings based on cement binder to a concrete base at the age of 28 days must be at least 0.75 MPa. The adhesion strength of the hardened mortar (concrete) to the concrete base after 7 days should be at least 50% of the design value.

5.4 The total thickness of floors with a concrete coating and with a coating of heat-resistant concrete should be taken by calculation, taking into account the loads acting on the floor, the materials used and the properties of the base soil, but taking into account the thickness concrete base not less than 120 mm.

5.5 In livestock buildings, the calculated concentrated loads from the weight of animals acting on the floor must be taken according to technological design standards, taking into account an overload coefficient of 1.2 and a dynamic coefficient of 1.2.

5.6 Floors in feed and manure passages of livestock buildings must be designed for the impact of moving loads from pneumatic transport at a pressure on the wheel of 14.5 kN.

5.7 Monolithic floors made of lightweight concrete with latex cement coating and Limestone-expanded clay floors used to ensure normal floor heat absorption in livestock buildings when animals are kept without bedding must be laid over a thermal insulating layer of expanded clay gravel

And have a compressive strength of at least 20 MPa.

5.8 The thickness and reinforcement of heat-resistant concrete slabs should be taken according to the calculation of structures lying on a deformable base under the action of the most unfavorable combination of floor loads.

5.9 The thickness of boards, parquet, parquet and solid boards, as well as parquet panels should be accepted according to current product standards.

5.10 The air space under the covering of floors made of boards, slats, parquet boards

And shields should not communicate with ventilation and smoke ducts, and in rooms with an area of ​​more than 25 m 2 should additionally be divided by partitions made of boards into closed compartments measuring (4–5)(5–6) m.

5.11 To ensure comfortable conditions for humans from an antistatic point of view

And protection of electronic equipment from electrical discharges with a voltage of more than 5 kV, floors in residential and public buildings must be made with

coating of polymer antistatic materials with specific surface electrical resistance in the range of 1·106 – 1·109 Ohm.

5.12 In the premises of industrial buildings with the requirement of “electronic hygiene”, in which it is necessary to provide comfortable conditions for humans in terms of antistatic protection, as well as to protect electronic equipment from electrical discharges with a voltage of more than 2 kV, floors must be made with electrical dissipative