Hollow-core reinforced concrete floor slabs are one of the most popular types of reinforced concrete products, designed to separate building levels and foundations load-bearing structures. Technical conditions and standards are controlled by GOST 9561-91; their characteristics allow their use in any area of ​​construction: from private houses to industrial facilities. Mandatory application nuances include the use of lifting equipment for laying and checking the load-bearing capabilities. It is easy to select the desired series; the labeling includes all the necessary information.

Externally, multi-hollow panels are a rectangular box with regular geometry of walls and ends, with longitudinal reinforcement, round or pear-shaped internal cavities located at equal intervals. For their production, heavy, light and dense silicate grades of concrete are used (for load-bearing systems their strength class is not lower than B22.5). The voids are located parallel to the main direction along the length (for types based on 2 or 3 sides) or to any of the sides of the contour for floors marked PKK.

The presence of a frame is mandatory; to extend the service life and enhance reliability, all metal placed inside is treated with anti-corrosion compounds at the manufacturing stage. The panels, supported on 2 or 3 sides, contain a frame of prestressed reinforcement. Depending on the purpose of the floor slabs, one of the following grades of steel is used: seven-wire strands with a section of 6P-7, periodic profile 5Вр-II, K-7 ropes, thermally strengthened At-V rods and other materials that comply with the standard (series 1 141.1 - main document regulating the process of release and quality control of products).

The main technical characteristics include:

1. Dimensions and weight of structures. The thickness is standard and unchanged (for most types - 220 mm), length varies from 2.4 m to 12, width - within 1-2.6 m. The exception is types supported on 4 sides (PKK marking), their dimensions vary from 3×4.2 to 3×7.2 m, respectively. Average weight 1 l.m. with a width of 1 m it is 360 kg.

2. Load-bearing capacity. Depending on the grade of concrete and the intensity of reinforcement, slabs with voids can withstand from 450 to 1200 kg/m2. The standard value for the most popular series with round holes is 800 kg/m2, if it is necessary to exceed it, products are made to order.

3. The fire resistance limit of hollow-core panels is 1 hour; if necessary, it is increased by strengthening the reinforced frame.

The structures are valued for their reliability, light weight, good tensile strength due to the presence of internal voids, the ability to hide communications, resistance to moisture, open fire, biological influences, heat and sound insulation properties, durability. An important advantage is considered to be high geometric accuracy, which simplifies the installation process and subsequent finishing.

Type	Actual thickness, mm	Length (maximum, inclusive), m	Reduced slab thickness (ratio of concrete volume to area) mm	Diameter of voids, mm	Nominal distance between void centers, not less than mm
1pc, 1pkt, 1pkk	220	7.2 (up to 9 for slabs for industrial buildings, supported exclusively on 2 sides)	120	159	185
2PK, 2PKT, 2PKK		7,2	160	140
3PK, 3PKT, 3PKK		6,3		127
4pcs	260	9,0		159 *
5pcs		12	170	180	235
6pcs			150	203	233
7pcs	160	7,2	90	114	139
PG	260	12	150
PB	220	Depends on molding parameters

*there are additional cutouts in the upper zone.

The main standards for width are PK-10, PK-12 and PK-15. All types of holes have a round shape, with the exception of PG - slabs with pear-shaped voids. For options marked PKK, beveled ends are allowed.

All dimensions of reinforced concrete floors with holes inside are unified (including length spacing), deviations do not exceed 5 mm. The thickness indicated in the table characterizes the cost-effectiveness of the product.

Marking of hollow core slabs

Standard decryption includes:

1. A number characterizing the diameter size internal holes according to GOST 9561-91. Omitted for 1 PC; in most price lists there is a simple designation - PC.

2. Type. Indicated by 2 or 3 letters, contains information about the shape of the voids, the manufacturing method and the number of supported sides. Of all varieties, PB is produced by continuous molding.

3. Dimensions of hollow-core floor slabs: first comes the length (the side not supported by the supporting structures), then the width, in dm, rounded up to a larger value. The thickness is not indicated; this value depends on the type of product. The actual dimensions are always smaller: 20 mm in length, 10 mm in width.

4. Fourth mandatory item– a number reflecting the load-bearing capacity of a reinforced concrete product.

5. Type of reinforcement. Can be skipped for non-tensioned frames.

6. Brand of solution: not indicated for heavy solution, used in the majority of products. The letter L means the use of lightweight concrete, C - dense silicate.

7. Others, additional characteristics or design features products. These include resistance to seismic influences or aggressive gases, and the presence of embedded elements.

Scope and features of application

The main purpose is to organize a reliable prefabricated floor in objects with load-bearing walls (also used during construction). In private and low-rise construction they are used to lay the main floors, separate floors and attic space, arrangement pitched roofs V outbuildings, platforms and as a fence. Their load-bearing capacity fully complies with construction requirements ( standard rate when calculated taking into account the weight of people and furniture, it is 150 kg/m2, the actual value exceeds it several times). Soundproofing characteristics make it possible to provide reliable protection from noise even when installing single-layer floors.

Long slabs (up to 9 m for 1 pcs, 12 for 4 pcs, 5 pcs, 6 pcs and PG) are intended for installation in public buildings, the rest are considered universal and are recommended for residential buildings, including individual ones. When choosing dimensions, the need to comply with the standard for laying on supports is taken into account - from 7 to 15 cm, depending on the material of the walls (minimum - for dense brick, maximum - for aerated concrete). When converted into squares, the cost of 1 m2 for floors 1 m wide is more expensive than for products with 1.2 or 1.5 m, this is explained by the ban on their cross-cutting. The use of concrete products of the PC series allows:

• Get reliable design, designed for significant weight loads.
• Improve the building's insulation capabilities.
• Ensure a perfectly level horizontal floor (with proper placement and checking of supports).
• Improve the waterproofing, fire safety and acoustic protection of the building.

Cost of slabs for installation of floors

Series	Load-bearing capacity, kg/m2	Dimensions (length×width×thickness), mm	Weight, kg	Price for 1 piece, rubles
PC 16.10-8	800	1580×990×220	520	2 930
PC 20.12-8		1980×1190×220	750	4 340
PC 30.10-8		2980×990×220	880	6 000
PC 36.10-8		3580×990×220	1060	6 410
PC 45.15-8		4480×1490×220	2120	12 600
PC 60.18-8		5980×1780×220	3250	13 340
PC 90.15-8		8980×1490×220	4190	40 760
2PC 21.12-8	800	2080×1190×220	950	3 800
2PK 62.10-8		6180×990×220	2425	8 730

INTERSTATE COUNCIL FOR STANDARDIZATION. METROLOGY AND CERTIFICATION

INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION

INTERSTATE

STANDARD

REINFORCED CONCRETE FLOORS

FOR RESIDENTIAL BUILDINGS

Types and main parameters

Official publication

Standardinform

Preface

The goals, basic principles and basic procedure for carrying out work on interstate standardization are established by GOST 1.0-92 “Interstate standardization system. Basic provisions" and GOST 1.2-2009 "Interstate standardization system. Interstate standards, rules and recommendations for interstate standardization. Rules for development, adoption, application, updating and cancellation"

Standard information

1 DEVELOPED Joint stock company"TsNIIEP housing - institute for integrated design of residential and public buildings"(JSC "TSNIIEP Dwellings")

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

3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (protocol dated November 12, 2015 No. 82-P)

4 By order of the Federal Agency for technical regulation and metrology dated November 30, 2015 No. 2077-st interstate standard GOST 26434-2015 put into effect as a national standard Russian Federation from January 1, 2017

5 IN REPLACEMENT 26434-65

Information about changes to this standard is published in the annual information index “National Standards”. and the text of changes and amendments is in the monthly information index “National Standards”. In case of revision (replacement) or cancellation of this standard, the corresponding notice will be published in the monthly information index “National Standards”. Relevant information, notices and texts are also posted in information system public use- on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet

© Standardinform. 2016

In the Russian Federation, this standard cannot be fully or partially reproduced, replicated and distributed as an official publication without permission from the Federal Agency for Technical Regulation and Metrology

INTERSTATE STANDARD

REINFORCED CONCRETE FLOORS FOR RESIDENTIAL BUILDINGS Types and main parameters

Reinforced concrete panels for floors in residential buftdings. Types and basic parameters

Date of introduction - 2017-01-01

1 Application area

This standard establishes the types, main dimensions and parameters of floor slabs, general technical requirements to them.

This standard applies to prefabricated reinforced concrete floor slabs made from structural heavy and lightweight concrete (hereinafter referred to as slabs) and intended for the load-bearing part of the floors of residential buildings.

The requirements of this standard should be taken into account when developing regulatory documents and working documentation for specific types of slabs.

2 Normative references

8 of this standard, normative references are used to the following inter state standards:

GOST 13015-2012 Concrete and reinforced concrete products for construction. General technical requirements. Rules for acceptance, labeling, transportation and storage

GOST 21779-82 Accuracy assurance system geometric parameters in construction. Technological tolerances

GOST 23009*78 Prefabricated concrete and reinforced concrete structures and products. Symbols (brands)

GOST 26433.0*85 System for ensuring the accuracy of geometric parameters in construction. Rules for performing measurements. General provisions

Note - When using this standard, it is advisable to check the validity of the reference standards in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or using the annual information index “National Standards”, which was published as of January 1 of the current year, and on issues of the monthly information index “National Standards” for current year. If the reference standard is replaced (changed), then when using this standard you should be guided by the replacing (changed) standard. If the reference standard is canceled without replacement, then the provision in which a reference is made to it is applied in the part that does not affect this reference.

3 Terms and definitions

8 of this standard the following terms with corresponding definitions are used:

3.1 plate: Large-sized flat element building structure, performing load-bearing, enclosing or combined - load-bearing and enclosing, heat-technical, sound-proofing functions.

3.2 floor: Horizontal internal load-bearing structure in a building separating floors.

3.3 coordination (nominal) size of the slab: Design size of the slab between the alignment (coordination) axes of the building in the horizontal direction.

3.4 design size of the slab: Design size of the slab, differing from the design (nominal) size by a standardized gap, taking into account installation and manufacturing tolerances.

Official publication

4 Types, main parameters and dimensions

4.1 Plates are divided into the following types:

Solid single layer:

1P - slabs 120 mm thick.

2P - slabs 160 mm thick;

Multi-hollow:

1 PC - slabs 220 mm thick with round voids with a diameter of 159 mm.

2PK - slabs 220 mm thick with round voids with a diameter of 140 mm.

PB - slabs 220 mm thick without formwork molding.

Slabs of types 2P and 2PK are made only from heavy concrete.

The shape and dimensions of voids in PB type slabs are established by standards or technical specifications for slabs of this type.

4.2 Plates of types 1P. 2P and. subject to bench molding. 1pk, 2pk can be provided for support on two or three sides or along the contour. PB type slabs are designed to be supported on two sides.

4.3 In residential buildings with built-in or attached public premises, for the floors of these premises it is allowed to use slabs of the types and sizes established for the floors of public buildings.

4.4 The coordination length and width of the slabs must correspond to those indicated in Table 1.

Table 1

Slab size	Coordination dimensions of the slab, mm		Slab weight (reference), t
	Plates type 1P
Plates type 2P
	Slab types

Continuation of Table 1

Slab size	Cooodinary	slab weight, mm	Slab weight (reference), t

End of table 1

Slab size	Cooodinary	plate dimensions, mm	Slab weight (reference), t

Notes

1 For slabs of type 2PK and PB in the designation of the standard size given in this table, replace 1PK with 2PK or PB.

2 If there are slabs of the same standard size that differ in reinforcement in order to be supported on two, three sides or along the contour, an additional designation should be entered into the marking.

3 Coordination length - 9000 mm is applicable only for slabs of type 1 PC.

4 The mass of the slabs is given for slabs made of heavy concrete with an average density of 2500 kg/m 1.

5 The direction of the design span of type 1PK slabs is set parallel to the length or width of the slab.

4.5 The slabs in the floor of the building should be placed in such a way that their coordination length is equal to the corresponding transverse or longitudinal pitch of the building’s load-bearing structures indicated in Figure 1.

8 cases when in internal load-bearing walls with a thickness of 300 mm or more, paired coordination axes are used (replaceable in project documentation one alignment axis), the coordination length of the slab should be equal to the distance between the alignment axes of the building minus the coordination size of the insert or half the coordination size of the insert indicated in Figure 2.

to = L 0 h s In

A>. coordination length of the slab; And. the distance between the transverse and longitudinal coordination axes of the building, respectively

Figure 1

1 - coordination axes of the building; 2 - center axis of the building; a is the distance between paired

coordination axes; A) - coordination length of the slab; Ai and - the distance between the transverse and longitudinal coordination axes of the building, respectively; L" and B" - the distance between the transverse and longitudinal alignment axes of the building, respectively

Figure 2

4.6 The structural length and width of the slabs should be taken equal to the corresponding coordination dimensions indicated in Figures 1.2 and Table 1, reduced by the size of the gap between adjacent slabs - ai indicated in Table 2.

If there are separating elements in places where slabs meet, the geometric axes of which are aligned with the coordination axes (for example, monolithic anti-seismic belts, ventilation ducts etc.). the structural length of the slabs should be taken equal to the corresponding coordination size indicated in Figures 1. 2 and in Table 1. reduced by the size of the gap of the separating element - Og. indicated in table 2.

4.7 The shape and dimensions of PB type slabs must correspond to those established by the working drawings of the slabs, developed in accordance with the parameters of the molding equipment of the manufacturer of these slabs.

4.8 Additional dimensions taken into account when determining the structural dimensions of the slab are given in Table 2.

Table 2

Range of application of the plate	Additional dimensions taken into account when determining the structural size of the slab, mm
Large-panel buildings, including buildings with a calculated seismicity of 7-9 points"				10 - for slabs with a coordination width of less than 2400: 20 - for slabs with a coordination width of 2400 or more
Buildings with walls made of bricks, stones and blocks, with the exception of buildings with a calculated seismicity of 7-9 points
Buildings with walls made of bricks, stones and blocks with a calculated seismicity of 7-9 points
Frame buildings, including buildings with a calculated seismicity of 7-9 points

4.9 In the case of a slab covering a space exceeding the distance between adjacent coordination axes of the building (for example, for a slab supported by the entire thickness of the wall staircase in large-panel buildings with transverse load-bearing walls, etc.), the structural length should be taken equal to the corresponding coordination length indicated in Table 1 and increased by size - az. indicated in table 2.

5 Technical requirements

5.1 Depending on their location in the floor of the building, slabs are used for design uniformly distributed loads (without taking into account the slabs’ own weight) equal to 3.0; 4.5; 6.0; 8.0 kPa (respectively 300.450, 600.800 kgf/m2).

5.2 The working drawings of the slabs used in a particular building indicate the location of embedded parts, reinforcement outlets, local cutouts, holes and other structural details.

5.3 The consumption rates of concrete and steel slabs must correspond to those indicated on the working drawings, taking into account possible clarifications made by the design organization in the prescribed manner.

5.4 The slabs must provide a fire resistance limit in accordance with the requirements of current regulatory documents and technical documentation 4 depending on the required fire resistance of the building.

The fire resistance limit of the slabs is indicated on the working drawings.

5.5 The accuracy of the linear dimensions of the slabs should be taken according to the fifth or sixth accuracy class according to GOST 21779, taking into account the provisions of GOST 26433.0.

SP 112.13330.2012 “SNiP 21.01-97” is valid not on the territory of the Russian Federation Fire safety buildings and structures."

Quality requirements concrete surfaces And appearance slabs are installed in accordance with GOST 13015 and must be recorded in the production order.

5.6 Indices of airborne noise insulation of slabs and reduced level impact noise under the slab, taken into account when determining the sound insulation indicators of the floor, taking into account current regulatory documents and technical documentation 2, are given in Table 3.

Table3_

	Average density of concrete slab, kg/m*		Index value. dB
			airborne sound insulation slab	reduced level of impact noise from an LSD stove

Notes

1 For PB type slabs, airborne sound insulation parameters are set depending on the shape and size of the voids.

2 The given level of impact noise under the slab is based on experimental results

research._

5.7 Floor structures used in floors, depending on the type of floor slab, are given in Table A.1 of Appendix A.

5.8 Slabs should be marked with marks in accordance with GOST 23009. When establishing designations, the following provisions must be taken into account.

The slab brand consists of alphanumeric groups separated by hyphens.

The first group contains the designation of the type of slab and overall dimensions - structural length and width.

The structural length and width of the slab are indicated in decimeters (rounded to the nearest whole number), and the thickness - in centimeters.

In the second group indicate:

The value of the design load in kilolascals.

Class of prestressed reinforcement - for prestressed slabs.

For slabs made from lightweight concrete, the type of concrete is additionally indicated, denoted by the capital letter “L”.

The third group, if necessary, includes additional characteristics that reflect the special conditions of use of the slabs, their resistance to seismic and other impacts, designations of the design features of the slabs, such as the type and location of reinforcement outlets, embedded products, etc. Special conditions The applications of the slabs are indicated in capital letters, the design features of the slabs are indicated in lowercase letters or Arabic numerals.

Example symbol(brand) slabs type 1 PC, length 5980 mm. width 1490 mm. for a design load of 4.5 kLa (450 kgf/m2), made of heavy concrete with prestressed reinforcement of class A800 (At-V):

1PK60.15-4.5A800

The same for a slab made of lightweight concrete:

1PK60.15-4.5A800L

The same for a slab supported on three sides:

1PK60.15-4.5A8003

The same for a slab supported on four sides:

1PK60.15-4.5A8004

Note - It is allowed to manufacture slabs of other sizes and mark them with marks in accordance with the working drawings standard designs before their revision.

d On the territory of the Russian Federation, SP 51.13330.2011 “SNiP 23*03-2003 Noise Protection” is in force.

Applicable floor structures

Table A.1

Appendix B (for reference)

Terms used in Appendix A

B.1 The following terms with corresponding definitions are used in Appendix A:

B.1.1 single-layer floor: Floor. oosgoyatsiya from a coating - linoleum on a heat- and sound-insulating basis, laid directly on the floor slabs.

B. 1.2 single-layer floor on a leveling screed: Pop. consisting of a covering - linoleum on a heat- and sound-insulating basis, laid on a leveling screed laid directly on the floor slabs.

B.1.3 floating floor: Floor. consisting of a coating, a rigid base in the form of a monolithic or prefabricated screed and a continuous soundproofing layer of elastic-soft or bulk materials, laid on floor slabs.

B.1.4 hollow floor: Floor. consisting of a hard covering along the joists and soundproofing pads laid on the floor slabs.

B.1.5 hollow-core layered floor: Floor. consisting of a hard covering and a thin soundproofing layer, laid directly on the floor slabs or on a leveling screed.

UDC 691.328.1.022-413:006.354 MKS 91.080.40

Key words: lita, floor slab, solid slabs, a lot hollow core slabs, coordination dimensions, structural length and width, standard size, types, parameters, brand, concrete, class, technical requirements, reinforcement, embedded parts.

Editor EY. Shapygina Corrector L.S. Lysenko Computer layout E.K. Kuzina

Signed for publication on 02/08/2016. Format 60x84"/*.

Uel. oven l. 1.40. Circulation 37. Zak. 62.

Prepared based on electronic version provided by the standard developer

FSUE "STANDARTINFORM"

123995 Moscow. Grenade Lane.. 4.

The construction of buildings for any purpose can be significantly facilitated if standard unified elements are used. Floor slabs are considered one of the main building units. In our article we will talk about reinforced concrete structures floor slabs.

This is the most common and economical option, which has significant advantages over other materials. Assortment concrete slabs It is also quite wide, which will allow you to vary the size and choose a solution for any architectural task.

Why choose reinforced concrete

Each of the existing ones has advantages in using building materials. When choosing the right one, you must first of all focus on the type of building and the tasks assigned to it. Wood coverings are more flexible, light weight and natural in origin, but are also very susceptible to pests and have a shorter service life compared to concrete varieties. In addition, it makes sense to take into account the difference in and concrete.

Products are classified according to all indicators:

• Construction type.
• Dimensions.
• Class of fittings used.
• Type of concrete.
• Additional resistance to external influences.
• Design features.

In order to have an idea about everyone possible options and, let’s consider each of the above parameters separately in a little more detail.

Type of construction according to GOST classification

The standard size of the product must be indicated in capital letters, the maximum number of which should not exceed three units.

Learn about hollow core slabs and their technical specifications can be found in the article. You can learn about possible options for filling the openings between floor slabs, what to choose from foam block or gas block and which material is better.

Basic designations for the type of construction of reinforced concrete products:

No.:	Symbol:	Product name:
1.	WITH	Piles.
2.	F	Foundations (column, tile).
3.	FL	Strip foundations.
4.	FO	Foundations for equipment.
5.	FB	Foundation blocks.
6.	BF	Foundation beams.
7.	TO	Columns.
8.	CE	Column racks (for pipelines).
9.	R	Crossbars.
10.	B	Beams (general designation).
11.	BC	Beams for cranes.
12.	BO	Strapping beams.
13.	BP	Rafter beams.
14.	BS	Rafter beams.
15.	BE	Beams for overpasses.
16.	BT	Tunnel beams.
17.	FP	Rafter trusses.
18.	FS	Rafter trusses.
19.	P	Monolithic floor slabs.
20.	PD	Bottom slabs for tunnels and channels for communications.
21.	PT	Floor slabs for tunnels and channels for communications.
22.	OK	Channel trays.
23.	PC	Floor pits with round voids.
24.	PP	Parapet slabs.
25.	BY	Slabs for windows.
26.	OP	Support cushions.
27.	LM	Flights of stairs.
28.	LP	Staircase landings.
29.	PM	Stair steps.
30.	LB	Stair beams, stringers.
31.	SB	Wall blocks.
32.	C-Sec	Basement wall blocks.
33.	PS	Wall panels.
34.	PG	Partition panels.
35.	PR	Jumpers.
36.	ST	Walls for supports.
37.	Sh	Reinforced concrete sleepers for railways.
38.	T	Non-pressure socket reinforced concrete pipes.
39.	TF	Reinforced concrete non-pressure seam pipes.
40.	TN	Vibrohydropressed reinforced concrete pressure pipes.
41.	BT	Concrete pipes.

Choose suitable products possible according to the main purpose. If the design can have several standard sizes, letter designation may be supplemented with numbers. Therefore, for reinforced concrete slabs floors with round voids, the product marking will begin with “PC”, monolithic structures “P”, the remaining designations will be deciphered further.

You can find out more about which ones are necessary by reading the article.

More information

For products intended for use in more than difficult conditions operation, there is also a special classification according to the type of prestressed reinforcement, which is used in the manufacture of the structure. Concrete mortar is also sometimes marked.

Any house made of blocks has wall partitions; you can learn about those made of wall blocks from the article.

Main types of concrete:

Concrete is also classified according to its resistance to aggressive environments. This indicator is usually used to indicate the permeability of the finished concrete layer. It is used in special construction, and for the construction of individual houses it is enough to use concrete with normal permeability.

Basic overall dimensions hollow core slabs:

№ p/n:	Stove brand:	Product length, mm:	Product width, mm:	Weight, t:	Volume, m³:
1.	PC 17-10.8	1680	990	0,49	0,36
2.	PC 17-12.8	1680	1190	0,61	0,44
3.	PC 17-15.8	1680	1490	0,65	0,55
4.	PC 18-10.8	1780	990	0,38	0,38
5.	PC 18-12.8	1780	1190	0,65	0,46
6.	PC 18-15.8	1780	1490	0,86	0,58
7.	PC 19-10.8	1880	990	0,55	0,4
8.	PC 19-12.8	1880	1190	0,69	0,49
9.	PC 19-15.8	1880	1490	0,9	0,62
10.	PC 20-10.8	1980	990	0,61	0,44
11.	PC 20-12.8	1980	1190	0,76	0,54
12.	PC 20-15.8	1980	1490	1,0	0,68
13.	PC 21-10.8	2080	990	0,65	0,475
14.	PC 21-12.8	2080	1190	0,8	0,571
15.	PC 21-15.8	2080	1490	0,97	0,71
16.	PC 22-10.8	2180	990	0,725	0,497
17.	PC 22-12.8	2180	1190	0,85	0,6
18.	PC 22-15.8	2180	1490	1,15	0,751
19.	PC 23-10.8	2280	990	0,785	0,52
20.	PC 23-12.8	2280	1190	0,95	0,62
21.	PC 23-15.8	2280	1490	1,179	0,78
22.	PC 24-10.8	2380	990	0,745	0,56
23.	PC 24-12.8	2380	1190	0,905	0,68
24.	PC 24-15.8	2380	1490	1,25	0,78
25.	PC 26-10.8	2580	990	0,825	0,56
26.	PC 26-12.8	2580	1190	0,975	0,68
27.	PC 26-15.8	2580	1490	1,325	0,84
28.	PC 27-10.8	2680	990	0,83	0,58
29.	PC 27-12.8	2680	1190	1,01	0,7
30.	PC 27-15.8	2680	1490	1,395	0,87
31.	PC 28-10.8	2780	990	0,875	0,61
32.	PC 28-12.8	2780	1190	1,05	0,73
33.	PC 28-15.8	2780	1490	1,425	0,91
34.	PC 30-10.8	2980	990	0,915	0,65
35.	PC 30-12.8	2980	1190	1,11	0,78
36.	PC 30-15.8	2980	1490	1,425	0,98
37.	PC 32-10.8	3180	990	0,975	0,69
38.	PC 32-12.8	3180	1190	1,2	0,83
39.	PC 32-15.8	3180	1490	1,6	1,04
40.	PC 33-10.8	3280	990	1,0	0,71
41.	PC 33-12.8	3280	1190	1,3	0,86
42.	PC 33-15.8	3280	1490	1,625	1,08
43.	PC 34-10.8	3380	990	1,05	0,74
44.	PC 34-12.8	3380	1190	1,24	0,88
45.	PC 34-15.8	3380	1490	1,675	1,11
46.	PC 36-10.8	3580	990	1,075	0,78
47.	PC 36-12.8	3580	1190	1,32	0,94
48.	PC 36-15.8	3580	1490	1,75	1,17
49.	PC 38-10.8	3780	990	1,15	0,82
50.	PC 38-12.8	3780	1190	1,39	0,99
51.	PC 38-15.8	3780	1490	1,75	1,24
52.	PC 39-10.8	3880	990	1,2	0,85
53.	PC 39-12.8	3880	1190	1,43	1,02
54.	PC 39-15.8	3880	1490	1,8	1,27
55.	PC 40-10.8	3980	990	1,2	0,87
56.	PC 40-12.8	3980	1190	1,475	1,04
57.	PC 40-15.8	3980	1490	1,92	1,3
58.	PC 42-10.8	4180	990	1,26	0,91
59.	PC 42-12.8	4180	1190	1,525	1,09
60.	PC 42-15.8	4180	1490	1,97	1,37
61.	PC 43-10.8	4280	990	1,26	0,93
62.	PC 43-12.8	4280	1190	1,57	1,12
63.	PC 43-15.8	4280	1490	2,0	1,4
64.	PC 44-10.8	4380	990	1,29	0,95
65.	PC 44-12.8	4380	1190	1,61	1,15
66.	PC 44-15.8	4380	1490	2,06	1,44
67.	PC 45-10.8	4480	990	1,33	0,98
68.	PC 45-12.8	4480	1190	1,62	1,17
69.	PC 45-15.8	4480	1490	2,11	1,47
70.	PC 48-10.8	4780	990	1,425	1,04
71.	PC 48-12.8	4780	1190	1,725	1,25
72.	PC 48-18.8	4780	1490	2,25	1,57
73.	PC 51-10.8	5080	990	1,475	1,11
74.	PC 51-12.8	5080	1190	1,825	1,33
75.	PC 51-15.8	5080	1490	2,475	1,67
76.	PC 52-10.8	5180	990	1,53	1,13
77.	PC 52-12.8	5180	1190	1,9	1,36
78.	PC 52-15.8	5180	1490	2,42	1,7
79.	PC 53-10.8	5280	990	1,6	1,13
80.	PC 53-12.8	5280	1190	1,91	1,38
81.	PC 53-15.8	5280	1490	2,46	1,73
82.	PC 54-10.8	5380	990	1,6	1,17
83.	PC 54-12.8	5380	1190	1,95	1,41
84.	PC 54-15.8	5380	1490	2,525	1,76
85.	PC 56-10.8	5580	990	1,65	1,22
86.	PC 56-12.8	5580	1190	2,01	1,46
87.	PC 56-15.8	5580	1490	2,6	1,85
88.	PC 57-10.8	5680	990	1,675	1,24
89.	PC 57-12.8	5680	1190	2,05	1,49
90.	PC 57-15.8	5680	1490	2,75	1,86
91.	PC 58-10.8	5780	990	1,71	1,24
92.	PC 58-12.8	5780	1190	2,07	1,51
93.	PC 58-15.8	5780	1490	2,73	1,89
94.	PC 59-10.8	5880	990	1,775	1,26
95.	PC 59-12.8	5880	1190	2,11	1,54
96.	PC 59-15.8	5880	1490	2,825	1,93
97.	PC 60-10.8	5980	990	1,775	1,3
98.	PC 60-12.8	5980	1190	2,15	1,57
99.	PC 60-15.8	5980	1490	2,8	1,96
100.	PC 62-10.8	6180	990	1,83	1,35
101.	PC 62-12.8	6180	1190	2,21	1,62
102.	PC 62-15.8	6180	1490	2,91	2,03
103.	PC 63-10.8	6280	990	1,86	1,37
104.	PC 63-12.8	6280	1190	2,25	1,65
105.	PC 63-15.8	6280	1490	3,0	2,09
106.	PC 64-10.8	6380	990	1,88	1,39
107.	PC 64-12.8	6380	1190	2,26	1,67
108.	PC 64-15.8	6380	1490	3,0	2,09
109.	PC 65-10.8	6480	990	1,9	1,41
110.	PC 65-12.8	6480	1190	2,29	1,7
111.	PC 65-15.8	6480	1490	3,02	2,12
112.	PC 66-10.8	6580	990	1,94	1,43
113.	PC 66-12.8	6580	1190	2,32	1,72
114.	PC 66-15.8	6580	1490	3,1	2,16
115.	PC 67-10.8	6680	990	1,96	1,45
116.	PC 67-12.8	6680	1190	2,44	1,75
117.	PC 67-15.8	6680	1490	3,23	2,19
118.	PC 68-10.8	6780	990	2,01	1,48
119.	PC 68-12.8	6780	1190	2,5	1,79
120.	PC 68-15.8	6780	1490	3,3	2,25
121.	PC 69-12.8	6880	1190	2,54	1,78
122.	PC 69-15.8	6880	1490	3,16	2,22
123.	PC 70-10.8	6980	990	2,06	1,52
124.	PC 70-12.8	6980	1190	2,46	1,83
125.	PC 70-15.8	6980	1490	3,27	2,29
126.	PC 72-10.8	7180	990	2,12	1,56
127.	PC 72-12.8	7180	1190	2,53	1,88
128.	PC 72-15.8	7180	1490	3,36	2,35
129.	PC 73-12.8	7280	1190	2,64	1,91
130.	PC 73-15.8	7280	1490	3,41	2,39
131.	PC 74-12.8	7380	1190	2,67	1,93
132.	PC 74-15.8	7380	1490	3,45	2,42
133.	PC 75-12.8	7480	1190	2,8	1,96
134.	PC 75-15.8	7480	1490	3,49	2,45
135.	PC 76-12.8	7580	1190	2,74	1,98
136.	PC 76-15.8	7580	1490	3,53	2,48
137.	PC 77-12.8	7680	1190	2,78	2,01
138.	PC 77-15.8	7680	1490	3,59	2,52
139.	PC 78-12.8	7780	1190	2,82	2,04
140.	PC 78-15.8	7780	1490	3,83	2,55
141.	PC 79-12.8	7880	1190	2,85	2,06
142.	PC 79-15.8	7880	1490	3,68	2,58
143.	PC 80-12.8	7980	1190	3,063	2,09
144.	PC 80-15.8	7980	1490	3,73	2,62
145.	PC 81-12.8	8080	1190	3,1	2,12
146.	PC 81-15.8	8080	1490	3,78	2,65
147.	PC 82-12.8	8180	1190	2,95	2,14
148.	PC 82-15.8	8180	1490	3,82	2,68
149.	PC 83-12.8	8280	1190	2,99	2,17
150.	PC 83-15.8	8280	1490	3,86	2,71
151.	PC 84-12.8	8380	1190	3,02	2,19
152.	PC 84-15.8	8380	1490	3,92	2,75
153.	PC 85-12.8	8480	1190	3,06	2,22
154.	PC 85-15.8	8480	1490	3,96	2,78
155.	PC 86-12.8	8580	1190	3,3	2,25
156.	PC 86-15.8	8580	1490	4,0	2,81
157.	PC 87-12.8	8680	1190	3,13	2,27
158.	PC 87-15.8	8680	1490	4,06	2,85
159.	PC 88-12.8	8780	1190	3,16	2,3
160.	PC 88-15.8	8780	1490	4,1	2,88
161.	PC 89-12.8	8880	1190	3,17	2,32
162.	PC 89-15.8	8880	1490	4,15	2,91
163.	PC 90-12.8	8980	1190	3,2	2,35
164.	PC 90-15.8	8980	1490	4,2	2,94

The last designation, the number “8” at the end of the marking, indicates the design load, which is 800 kgf/m², standard for residential buildings.

If you have at least once encountered the construction process or carried out apartment renovations, then you should know what hollow-core floor slabs are. Their importance is difficult to overestimate. Design features, its main characteristics and markings are taken into account during the work process. This knowledge allows you to determine what the limit of useful and decorative loads the slab can withstand.

Dimensions and weight

The size and type of the product affect its final price. The length of the described slabs can be equal to the limit from 1.18 to 9.7 m. As for the width, it is limited to a value from 0.99 to 3.5 m.

The most popular are those products whose length is 6 m, while their width usually reaches a maximum of 1.5 m. The minimum value is 1.2 m. Getting acquainted with the dimensions of hollow core slabs, you can understand that their thickness remains unchanged and is equal to 22 cm. Given the impressive weight of such structures, an assembly crane is usually used for their installation; its capacity should be 5 tons.

Types of loads on reinforced concrete structures

Any overlap in the structure has three parts, among them:

• top;
• lower;
• structural.

The first is where the residential floor above is located. This includes flooring, insulation materials and screeds. The bottom is the surface non-residential premises. This includes hanging elements and ceiling finishes. As for the structural part, it combines the above and holds them in the air.

Hollow-core floor slabs serve as a structural part. A constant static load is exerted on it finishing materials, used in the design of ceilings and floors. This means elements suspended from the ceiling and installed on top of it, namely:

• punching bags;
• suspended ceilings;
• chandeliers;
• partitions;
• baths.

In addition, you can also highlight dynamic load. It is caused by objects moving on the surface. In this case, one should take into account not only the mass of a person, but also domestic animals, which today can be quite exotic (tigers, lynxes, etc.).

Distributed and point types of loads

The above types of loads can be applied to hollow core floor slabs. A point, for example, is an impressively sized punching bag suspended from the ceiling. As for the suspension system, it interacts with the suspensions at regular intervals with a frame and exerts a distributed load.

These two types of load can have a complex effect. IN in this case the calculation will be more complicated. If you install a bathtub that holds 500 liters, then you should take into account two types of load. The filled container is distributed on the surface of the support between the points of contact. There is also a point load, which is applied to each leg individually.

Calculation of permissible loads

The load on hollow core slabs can be calculated by you. These manipulations are carried out in order to find out how much the product can bear. Afterwards it is necessary to determine what the ceiling will bear. This should include partitions, base materials insulation layers, parquet flooring and cement screeds.

The total weight of the load must be divided by the number of slabs. Roof supports and load-bearing supports should be located at the ends. The internal parts are reinforced in such a way that the load is applied to the ends. The central part of the slab is not capable of supporting the weight of serious structures. This is true even if there are main walls or support columns below. Now you can calculate the load on the hollow core slab. To do this, you need to find out its weight. If we take a product marked PK-60-15-8, then we can say that its weight is 2850 kg. It is manufactured according to state standards 9561-91.

The first step is to determine the area of ​​the bearing surface of the product; it is 9 m2. To do this, 6 must be multiplied by 1.5. Now you can find out how many kilograms of load this surface can bear. Why do you need to multiply the area by permissible load by one square meter. As a result, you will be able to get 7200 kg (9 m2 multiplied by 800 kg per m2). From here you should subtract the mass of the slab itself and then you will be able to get 4350 kg.

Then you need to calculate how many kilograms the floor insulation will add, floor coverings and screed. Usually in work they try to use such a volume of solution and thermal insulation so that the materials together do not weigh more than 150 kg/m2. With a surface of 9 m2, the hollow core slab will carry 1350 kg. This value can be obtained by multiplying by 150 kg/m2. This number should be subtracted from the previously obtained figure (4350 kg). Which will ultimately allow you to get 3000 kg. Recalculating this value per square meter, you get 333 kg/m2.

According to sanitary standards and rules, a weight of 150 kg/m2 should be allocated to static and dynamic loads. The remaining 183 kg/m2 can be used for installation decorative elements and partitions. If the weight of the latter exceeds calculated value, then it is recommended to prefer a lighter floor covering.

State standards and technical requirements

For large-panel buildings for various purposes Hollow core slabs must be used. They are manufactured according to the above state standard and can be based on the following materials:

• lightweight concrete;
• silicate concrete;
• heavy concrete.

The manufacturing technology, which involves the presence of voids, provides structures with excellent sound insulation properties and low weight. They are ready to serve long time and have good strength characteristics, which are due to the use of steel ropes and reinforcement.

During installation, such products are located on supporting structures. Round voids can have a diameter of up to 159 mm. The dimensions of hollow core slabs are one of the factors by which products are classified. The length can reach 9.2 m. As for the width, the minimum is 1 m and the maximum is 1.8 m.

The class of concrete used corresponds to B22.5. Density is equal to the limit from 2000 to 2400 kg/m 3. State standards also specify the grade of concrete taking into account frost resistance, it looks like this: F200. Hollow slabs (GOST 9561-91) are made of concrete with a strength within 261.9 kg/cm 2.

Brands of hollow core slabs

Reinforced concrete products cast in a factory are subject to marking. It is encoded information. The slabs are designated by two capital letters PC. This abbreviation is next to the number that indicates the length of the product in decimeters. Next are the numbers indicating the width. The last indicator indicates how much weight in kilograms 1 dm2 can withstand, taking into account its own weight.

For example, a reinforced concrete hollow core slab PK 12-10-8 is a product with a length of 12 dm, which is 1.18 m. The width of such a slab is 0.99 m (approximately 10 dm). The maximum load per 1 dm2 is 8 kg, which is equal to 800 kg per square meter. In general, this value is the same for almost all hollow core slabs. As an exception, there are products that can withstand up to 1250 kg per square meter. You can recognize such slabs by their markings, at the end of which there are the numbers 10 or 12.5.

Cost of slabs

Interfloor hollow core slabs are manufactured using conventional or prestressed reinforcement. Panels, in addition bearing capacity, must also meet sound insulation requirements. For this purpose, the product is provided with holes, which may have a round or other cross-section. Such structures belong to the third category of crack resistance.

In addition to these characteristics, you may also be interested in the cost. You will have to pay 3,469 rubles for a hollow core slab weighing 0.49 tons. In this case we are talking about a product with the following dimensions: 1680x990x220 mm. If the weight of the slab increases to 0.65 tons, and the dimensions become 1680x1490x220 mm, then you will have to pay 4,351 rubles. The thickness of the hollow core slab remains unchanged, which cannot be said about the other parameters. For example, you can purchase a product with dimensions equal to 1880x990x220 mm for 3,473 rubles.

For reference

If the floor slab is manufactured at a factory, then state standards are used in the process. They guarantee high quality products and compliance with hardening time and temperature conditions. The solid type of slab is distinguished by its impressive weight and, accordingly, high cost. This explains the fact that such products are most often used in the construction of important buildings.

In conclusion

Floor slabs have found their popularity and are widely used in the construction of residential buildings and are lighter in weight compared to solid slabs, and they are cheaper. But in matters of reliability and strength they are not inferior. The location of voids and their number do not in any way affect the load-bearing properties of the slab. In addition, they allow you to achieve higher sound and thermal insulation properties buildings.

But no matter how light they are considered, their installation cannot be done without appropriate lifting equipment. This makes it possible to increase the accuracy of installation and complete construction in less time. short terms. These products are also good because they are manufactured in a factory, which means they undergo quality control.

Hollow-core floor slabs GOST 9561-91
Name	Dimensions (LxWxH, mm)	Volume, m3	Weight, t	Price for 1 unit. with VAT, rub.
PC 24-12-8 AtV T	2380x1190x220	0,36	0,9	4306
PC 27-12-8 AtV T	2680x1190x220	0,40	1,01	4799
PC 30-12-8 AtV T	2980x1190x220	0,44	1,11	5429
PC 33-12-8 AtV T	3280x1190x220	0,49	1,22	5934
PC 36-12-8 AtV T	3580x1190x220	0,53	1,32	6439
PC 39-12-8 AtV T	3880x1190x220	0,57	1,42	6944
PC 42-12-8 AtV T	4180x1190x220	0,61	1,53	7383
PC 45-12-8 AtV T	4480x1190x220	0,65	1,62	7532
PC 48-12-8 AtV T	4780x1190x220	0,69	1,73	8004
PC 51-12-8 AtV T	5080x1190x220	0,73	1,83	8474
PC 54-12-8 AtV T	5380x1190x220	0,78	1,95	8910
PK 57-12-8 AtV T	5680x1190x220	0,82	2,05	9347
PC 60-12-8 AtV T	5980x1190x220	0,86	2,15	9886
PC 63-12-8 AtV T	6280x1190x220	0,90	2,25	10421
PC 72-12-8 AtV T	7180x1190x220	1,01	2,53	13405
PC 24-15-8 AtV T	2380x1490x220	0,50	1,25	4774
PC 27-15-8 AtV T	2680x1490x220	0,55	1,38	5397
PC 30-15-8 AtV T	2980x1490x220	0,60	1,52	5916
PC 33-15-8 AtV T	3280x1490x220	0,65	1,61	6642
PC 36-15-8 AtV T	3580x1490x220	0,70	1,75	7265
PC 39-15-8 AtV T	3880x1490x220	0,74	1,85	7784
PC 42-15-8 AtV T	4180x1490x220	0,80	2,02	8407
PC 45-15-8 AtV T	4480x1490x220	0,88	2,2	8834
PC 48-15-8 AtV T	4780x1490x220	0,94	2,35	9437
PC 51-15-8 AtV T	5080x1490x220	0,99	2,48	9861
PC 54-15-8 AtV T	5380x1490x220	1,05	2,63	10427
PC 57-15-8 AtV T	5680x1490x220	1,10	2,75	11010
PC 60-15-8 AtV T	5980x1490x220	1,14	2,85	11744
PC 63-15-8 AtV T	6280x1490x220	1,19	2,98	12343
PC 72-15-8 AtV T	7180x1490x220	1,34	3,35	16734

Hollow-core reinforced concrete floor slabs are used in the construction of load-bearing structures of buildings and structures. The voids inside the slabs are designed to improve sound insulation and reduce the weight of the structure. The top side of the floor slabs will be the base of the floor, and the bottom side will be the ceiling. Hollow-core floor slabs are used in individual construction of houses, in the construction of residential and industrial multi-storey buildings.

Based on their external shape, floor slabs are divided into flat and ribbed. Flat slabs, in turn, are multi-hollow and solid. Our company produces PC hollow-core floor slabs. The diameter of the round voids is 159mm, the thickness of the slabs is also standard and is 220mm. These slabs are intended for laying on top of load-bearing walls with support on two end sides.

Hollow-core slabs can withstand enormous loads, but they cost special attention regarding the storage of these products. To store the slabs, you must prepare in advance flat surface, pour and compact the sand cushion. The slabs should never be laid directly on the ground. Along the edges at the bottom of each slab it is necessary to place wooden blocks. There should be two bars, at a distance of about 25-45 cm from each edge. It is strictly not recommended to place bars under the middle part of the slab in order to avoid cracks and breaks. Stacking of hollow-core floor slabs is permitted in a stack no more than 2.5 meters high.

The floor slabs lie flat and without differences. To do this, it is necessary to ensure that all the upper rows of load-bearing walls are positioned in the same horizontal plane. Before laying hollow-core slabs on walls made of blocks (foam concrete, aerated concrete, cinder block), it is necessary to make a reinforced concrete belt. Its thickness should be between 15-25cm. When installing hollow-core slabs, the holes in them are sealed. This can be done in advance when the slabs are stacked on the ground. Hollow-core slabs are laid using a thick mortar. The layer of solution should not exceed 2 cm.

The solution is applied over brickwork. This is done in order to cover the gaps if there are differences, as well as for a better fit of the slabs. The solution sets in 15-20 minutes; during this period of time, you can move the slab to align its position relative to the walls. To avoid hardening of the solution, it is applied immediately before lifting the floor slab. The hollow core slabs are lifted by the mounting loops. After the first slab has been laid and leveled, the installation of the next slab begins. The gaps at the joints are sealed polyurethane foam and cement milk.