Prestressed hollow core slabs

As a ceiling manufacturer, we offer high-quality prestressed hollow core slabs. Among other things, prestressed hollow core ceiling is a construction solution that significantly reduces the time of construction work and minimizes the cost of such work.

We also offer our other prefabricated products, including Zeran slabs, filigree slabs and prefabricated balconies.

SPK slabs are one of the types of prefabricated floors, that is, floors assembled from pre-manufactured ready-made elements. Nowadays it is one of the most popular ceilings among both individual investors and developers.

The popularity of prestressed floors is due, among other things, to their good load-bearing properties and is quick and easy to install. Prestressed hollow core slabs (also known as HC slabs) also have an attractive price per square meter of floor.

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Description Technical data Application Assembly Advantages Realizations Photos FAQ

HC prestressed panels basic information

HC slabs are prefabricated, prestressed concrete elements designed for the construction of floors. They are used both in residential, office or public buildings. But their properties work especially well in warehouse, commercial or industrial buildings, that is, where large spaces without any walls or partitions are expected, where floor slabs must have significant spans.

All pre-stressed hollow core slabs are produced in a modular width of 120 cm, but unlike pre-stressed hollow core slabs, they offer the possibility of both longitudinal and diagonal cutting.

Prestressed concrete slabs can also be used in places where it is required to pass all kinds of installations through the ceiling. The design of the slab makes it possible to make holes and cutouts in already at the stage of production (holes are made to make installation passages and for ventilation ducts).

Prestressed hollow core slabs price technical parameters installation tips

Prestressed hollow core slab and its technical parameters

Prestressed hollowcore slab is a floor slab made of C40/50 or C50/60 class reinforced concrete. The prestressing reinforcement is selected according to the needs of the project on the basis of the design documentation. Strings can be arranged in one or two rows, depending on the type of slab, fire resistance requirements and environmental conditions (exposure class).

The side surfaces of the slabs are formed in the form of longitudinal notches designed to ensure proper cooperation of adjacent slabs in transferring loads and prevent keyboarding during the use of the ceiling.

Depending on the type, prestressed plates, have several channels. They can have from four to seven longitudinal channels. These channels are longitudinal voids, stretching across the entire span of the slab, which serve to reduce its weight. The channels are spaced evenly across the width of the precast. The geometry of the entire slab is usually found in the design.

Prestressed hollow floor slabs are produced in a modular width of 120 cm, but have the ability to be cut both longitudinally and diagonally. Most importantly, by the fact that pre-stressed slabs can be shaped we have more possibilities to adapt them to the characteristics of the building. This largely allows a certain degree of design freedom. Prestressed slabs are therefore quite popular for the construction of single-family houses.

Unlike Zeran hollow core slabs, which are produced in essentially one height, HC prestressed slabs are produced in several standard heights: 20, 26, 32, 40 and 50 cm. The structural height of the floor is determined by the project specifications, the structural requirements of the building, the expected load-bearing capacity of the floor, its span. Ceilings are selected on the basis of the project documentation provided by the investor.

In residential construction or in office and public buildings, the most commonly used is a prestressed hollow core slab with a height of 20 or 26 cm and a maximum span of up to 13 m. Prestressed hollow floor slab with spans of more than 13 m is already produced in thicknesses of 32, 40 cm and more. For maximum hollow floor spans (about 20 m), the prestressed hollow floor slab must already be 50 cm thick.

SPK panels provide quite good acoustic comfort. Installation of prestressed hollow core slabs is a big cost reduction, as they are assembled in a few hours by crane installation. The slabs do not require additional processing, only filling the joints between the slabs.

Prestressed hollow core slabs

Hollow core slabs are a modern solution for prefabricated floors. They allow the construction of many types of buildings, from single-family houses to public buildings. Thanks to their properties, which allow for freedom of shape, they can be freely adapted to a given building.

The attractive price of prestressed hollow core slabs also has an impact on their popularity among investors.

Prestressed hollow core slabs price technical parameters installation tips

Of what elements the pre-stressed hollow core slab floor is composed

The following are the necessary or useful components for making the ceiling

Prestressed hollow core slabs

Prestressed panels

The number and type of prestressed hollow core slabs and their technical parameters are selected optimally for each construction project by a team of experienced engineers on the basis of the submitted project documentation.

Prefabricated floors Rim reinforcement

Rim reinforcement

Reinforcement and concreting of the rim and panel joints is carried out by the investor on his own in accordance with the detailed design.

Prefabricated floors Installation of prestressed hollow core slabs

HC hollow core panels and their installation instructions

The following is an abbreviated instruction on how to install a prestressed hollow core slab ceiling and the basic principles of installation.

Transportation of the SPK board

It is necessary to ensure that a vehicle with a length of 16 m and a weight of 40 tons can enter the site. An assembly crane (crane with traverse) is required for unloading. Slabs for transport should be properly secured with straps to prevent slipping off the transport platform.

They should be placed on appropriate spacers. In order to avoid the storage of prestressed hollow core slabs at the construction site, they can be delivered in the correct order according to the installation diagram.

Installation of prestressed hollow core slabs using a crosshead

Transfer of prestressed hollow core slabs

Prestressed concrete slabs can be carried only by means of a crosshead equipped with special jaw handles, the slabs should be secured from underneath with safety chains. Slabs can be handled only in the horizontal position. Prestressed slabs cut lengthwise or prestressed slabs with cutouts can be transported on belts or using chains with hooks. Here it should be remembered that slings must not be used at an angle exceeding 60°, risking damage to the item being moved.

Storage of prestressed hollow core slabs

SPK hollow core slabs should be stored in stacks, on a leveled and hardened surface, using 2 wooden shims, placed 30-50 cm from the end of the slabs, perpendicular to their length. Plates of the same length and the same strength parameters should be stored in one stack and the height of the stack should not exceed 2 m.

Slit hollowcore slabs and slabs with cutouts should be stacked on top of the stack.

Storage of hollow core slabs on the construction site

Installation of prestressed hollow core slabs

A crane with a traverse is required for the installation of prestressed panels. Using the traverse, the slabs are placed on the prepared walls (on neoprene pads or a layer of mortar). It is permissible to directly rest the slabs, without a layer of mortar and shims, on steel or other beams with a smooth, even surface. After the slabs are carefully laid, reinforcement is placed in the gaps between the slabs and the joints are poured with concrete mixture so that the slabs work together.

Before concreting, the slabs should be wetted generously with water so that they do not absorb water from the batch mix. The HC slab is also equipped with plugs for individual channels. The blanking plugs prevent the concrete mixture from getting inside when making rims.

What are the advantages of prestressed hollow core slabs?

Here’s a look at some of the key advantages of the ducted-compression ceiling.

Manufacturer of prefabricated ceilings and stairs Budmater

No wet work

In the case of ceilings made of prefabricated prestressed hollow core slabs, it is generally not necessary to perform monolithic elements on site, i.e. so-called wet work. Such work is necessary only in places where, for technical reasons, the monolithic slab must remain, for example, in places where the hollow core slab is connected to stairs or balconies.

Installation of the ceiling without mounting supports

Prestressed hollow core ceilings are installed without the need for mounting supports. The lack of stamping and formwork of the ceiling has a positive effect on the cost of the entire investment and the time of its implementation. Without assembly supports, finishing work on the lower floors can begin almost immediately after the floor slabs are placed.

Prestressed hollow core slab technical specifications dimensions parameters Diagram

Floor span

Prestressed hollow core ceilings, with a relatively low structural height, have large load-bearing capacities and spans exceeding 14 m. It is also possible to produce slabs with spans exceeding even 20 m, making them ideal for large industrial projects.

No ceiling keying

When prestressed floor slabs are properly installed, there is no keying effect, i.e. cracks and scratches in the ceiling. The lateral edges of the prestressed slab are designed precisely to protect the ceiling from adverse changes that may occur during use. We recommend the use of neoprene pads under the hollow core slabs.

Prestressed hollow core slab technical specifications dimensions parameters Diagram

Ceiling height

Flexible structural height of the ceiling selected on the basis of the span and set loads from 20 to 50 cm. In special cases we have the possibility to produce a ceiling with a thickness of only 15 cm.

Top-class materials

High-quality materials used in the production of prestressed slabs give them their characteristic properties, including the ability to carry heavy loads, achieve significant spans, high weather resistance or better sound insulation. SPK hollow core slabs are made of concrete of class C40/50 or C50/60. Reinforcement is provided by seven-strand steel strings at the bottom of the slab, stretched during the production process.

BUDMATER Design documentation of the ceiling

Project documentation

The offer for pre-stressed hollow core slabs is prepared individually for each inquiry, based on the documentation sent and the requirements of the investment. The offer includes the cost of the slabs along with transportation. We also provide full design documentation for the ceiling.

We invite you to send an inquiry with project documentation – this will allow us to provide a free quote for the floor in a few days, including, among other things, the price of prestressed hollow core slabs and the cost of delivery to the construction site.

Ask for a free quote!

Prestressed hollow core slabs price technical parameters installation tips

Here are just some of our implementations of pre-stressed hollowcore slabs. This list includes only large investments on which our prefabricated products have appeared.

Frequently asked questions by our customers about prestressed hollow core slabs – FAQs

What are prestressed hollow core slabs?

Pre-stressed hollow core slabs are prefabricated floor elements made of high-grade concrete, reinforced with prestressed steel tendons. They are characterized by high load-bearing capacity at a relatively low structural height, which makes it possible to achieve significant floor spans, even above 20 meters.

What is the price of prestressed hollow core slabs in 2025?

150-350 PLN net/m²

What are the dimensions of prestressed hollow core slabs?

Modular width 120 cm, span up to 20+ m

What is the use of prestressed hollow core slabs?

Warehouse buildings, commercial buildings, industrial buildings, residential buildings

What are the properties of prestressed hollow core slabs?

Can be cut, no mounting supports, spans up to 14+ m, no keyboarding

Ask for a free quote

Interested? Check out the range of prestressed hollow core slabs from Budmater!

Submit a quote form

Call 799 356 736

Write to zapytania@budmater.pl

Check out what partners are saying about us

Mr. Dariusz Urbas is an authorized salesman of RECTOR ceiling. He has actively participated in training courses on the use of RECTOBETON and RECTOLIGHT systems.
We confirm that he has a very good knowledge of our systems. He also stands out for his high attention to service quality and exceptional sales effectiveness

Krzysztof ZabójRECTOR Polska Sp. z o.o. - Sales director

I am very pleased to say that starting cooperation with you was a good decision. The delivered plates were made properly and carefully. I hope that in further cooperation this standard will be maintained.

Communication with your representative is also at a high level.

Wladyslaw Serwacinskieurodomy.pl

I wanted to thank you very much for your prompt and efficient handling of the matter.
The ceiling you provided meets my expectations 100% and I am very satisfied with the entire process – from the initial contact, initial quote, final design and delivery of the finished product. Everything very professionally and entirely to my liking.

Once again, thank you very much.

Slawek Pasternakindividual customer

Wholesale Trio-Complex, based in Stradunia, would like to thank BUDMATER company for nice service, professional advice and fast and trouble-free execution of orders. We are very satisfied with the cooperation and will be happy to continue it.

We recommend the BUDMATER enterprise to future clients.

Waldemar OperskalskiWholesale TRIO-COMPLEX

Darek is a business man full of passion and energy for action supported by many years of experience.

He has a lot of knowledge in the field of modern solutions for construction.

Marcin GlaberDomDlaKazdzie.pl

….Mr. Urbas has become a leader in promoting system solutions based on branded Ytong, Silka and Multipor products.
…XELLA Polska recommends Mr. Dariusz Urbas as a reliable, professional and effective Partner in the construction business.

Wojciech ŁasutXELLA Polska Sp. z o.o. - Director of Technical Sales Support

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Prestressed hollow core slabs are increasingly used in industrial construction. In the case of large real estate development projects or in the construction of all kinds of large-scale buildings, it is becoming more and more common to turn to solutions that are easy to install and fast, using prefabricated building structural elements.