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Ceiling Rector

Rector gooseneck floor

Rector floors are a system of dense-rib prefabricated floors, consisting of floor beams and concrete blocks. They are produced from concrete of C30/37 class in vibropress technology, ensuring high quality and repeatability of parameters. They are used in single-family housing, multi-family housing and public buildings.

For each project Rector ceiling price is calculated individually, with the assurance of comprehensive service and professional technical advice. We guarantee competitive pricing and timely delivery. We invite you for a free quote tailored to your investment.

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Rector prefabricated ceiling – system characteristics

The Rector floor is a modern structural solution using prefabricated concrete technology. The system consists of prefabricated floor beams reinforced with A-IIIN steel and concrete hollow blocks filling the spaces between the beams. The production technology at the prefabrication plant ensures high precision of execution and repeatability of technical parameters of each element.

Rector floor beams are manufactured from concrete class C30/37, characterized by high compressive strength. The main reinforcement consists of ribbed bars with diameters adapted to the design requirements, protected by a concrete cover of at least 40 mm. The production process is carried out under controlled conditions, with the use of a vibropress to ensure optimal compaction of the concrete mixture.

The Rector floor system allows the realization of floors with a modular span of up to 8.0 meters without the need for additional mounting supports. However, as a standard, temporary supports are recommended every 2.0-2.5 meters during hollow block placement and concreting. The dense-rib construction ensures uniform load distribution and high spatial rigidity of the entire system.

Concrete blocks of the Rector system are produced by vibropressing from concrete class C25/30.The elements are characterized by dimensional accuracy and smooth surface, facilitating subsequent finishing work. The structural height of the ceiling is 240 mm as standard, but modifications are possible depending on design requirements.

Strength parameters of the Rector floor

The characteristic load capacity of the Rector ceiling ranges from 3.0 to 8.0 kN/m², depending on the span and the reinforcement scheme used. The fire resistance class reaches REI 60 in accordance with PN-EN 13501-2. The acoustic parameters provide isolation from airborne sound at the level of Rw = 52 dB for a ceiling with a concrete pour of 50 mm thickness.

The modulus of elasticity of the concrete used in the Rector system is Ecm = 33 GPa, which guarantees limited deflection of the structure. The thermal expansion coefficient αt = 10×10-⁶/K ensures dimensional stability under varying temperature conditions. The concrete’s W8 water resistance protects the reinforcement from corrosion.

The Rector floor system meets the requirements of exposure class XC1 according to PN-EN 206, which predestines it for use in dry or permanently wet environments. The concrete’s frost resistance of F150 allows it to be used in areas subject to cyclic freezing and thawing with de-icing agents.

Rector component manufacturing technology

The manufacturing process of Rector floor elements is carried out in a prefabrication plant equipped with modern technological lines. The batching of concrete mixture components is carried out automatically, with a weight accuracy of ±2%. Vibrating the steel forms ensures optimal filling and compaction of the concrete around the reinforcement.

Maturing concrete in steam chambers at 40-60°C accelerates the achievement of early strength. After 16-24 hours, the elements reach 70% of the 28-day strength, allowing unmolding and transportation. Quality control includes testing the compressive strength of the concrete every 50 m³ of production and checking the geometry of each element.

Advantages of the Rector floor in prefabricated construction

Speed of installation without the use of heavy equipment

The Rector floor is characterized by extremely simple installation, requiring no construction crane. Lightweight floor beams weighing up to 40 kg/mb can be laid manually by a two-person installation team. The system eliminates the need to hire expensive crane equipment, which significantly reduces the cost of project implementation. The laying rate averages 100-150 m² of ceiling per day with a 4-person brigade.

Load capacity adapted to design requirements

The Rector system makes it possible to design floors with varying load capacities from 1.5 to 6.0 kN/m². Individual adjustment of beam reinforcement allows the structure to be optimized for specific loads. Cooperation with reinforced concrete rims ensures the spatial rigidity of the entire structural system of the building.

Elimination of traditional formwork

The use of the Rector floor system completely eliminates the need for full formwork. The blocks laid between the beams form a lost formwork for the over concrete layer. The savings in time and formwork materials translate into a reduction in labor costs of up to 40% compared to monolithic ceilings.

Rector ceiling – dimensional accuracy of prefabricated elements

Production under factory conditions guarantees dimensional tolerances of elements ±5 mm. Precision manufacturing of the Rector ceiling facilitates subsequent finishing work, eliminating the need for surface leveling. The smooth undersurface of the blocks can serve as a substrate for plastering or painting without additional filling.

Resistance to weather conditions during installation

Prefabricated elements of the Rector ceiling system are characterized by resistance to changing weather conditions. Installation can be carried out at temperatures from +5°C to +30°C without the need for special protection. Concrete of C30/37 classes provides F150 frost resistance, protecting the structure from damage in winter.

Possibility of staging construction work

The Rector system allows flexible scheduling of works. Once the beams and hollow blocks are in place, it is possible to carry out work on the upper floors before the superconcrete is made. Partial loading of the ceiling (up to 1.5 kN/m²) is allowed as early as 7 days after concreting, while maintaining assembly support.

Compatibility with building installations

The dense-rib design of the Rector ceiling makes it easier to run electrical and sanitary installations. The spaces between the ribs allow pipes and wires to be laid without forging furrows. The system allows for installation penetrations of up to 160 mm in diameter without weakening the load-bearing capacity of the structure.

Rector ceiling – a guarantee of prefabrication quality

Production in a certified prefabrication plant ensures constant quality control in accordance with PN-EN 13369. Each batch of Rector elements has a declaration of performance and CE marking. The system is covered by a 10-year manufacturer’s warranty for strength parameters while maintaining installation conditions.

Application of Rector ceiling in different types of buildings

The Rector ceiling is widely used in single-family residential construction, providing an economical solution for houses with room spans of up to 6 meters. The system works especially well in single-story structures with a usable attic and two-story buildings. The ability to adjust the load-bearing capacity allows you to design spacious living rooms without intermediate columns.

In multi-family housing, the Rector system is used in the construction of buildings up to 5 floors above ground. Typical applications include transverse and longitudinal interstory ceilings. The acoustic parameters of the ceiling meet the standard requirements for inter-apartment partitions after applying additional acoustic insulation.

Public facilities with Rector system

Rector prefabricated ceilings are used in educational facilities such as schools and kindergartens. The load-bearing capacity of 4.0 kN/m² meets the requirements for classrooms and corridors. The system allows the realization of gymnasiums with spans of up to 8 meters with the use of reinforced reinforcement of load-bearing beams.

Class B and C office buildings often use Rector ceiling technology because of the economy of the solution. The possibility of running installations in the inter-beam space facilitates the arrangement of open space. The system allows the construction of suspended acoustic ceilings without additional supporting structures.

Industrial and warehouse applications

In production halls with low technological loads, the Rector floor system is an alternative to steel floors. The REI 60 fire resistance meets the basic requirements for most warehouse facilities. The possibility of making technological openings with a diameter of up to 400 mm allows ventilation ducts to be carried out.

Multilevel garages use the Rector floor for payloads up to 5.0 kN/m². The system requires a leveling layer and an abrasion-resistant industrial floor. Drops for water drainage are made in a layer of superconcrete with a variable thickness of 60-100 mm.

Retrofits and adaptations using the Rector system

During the reconstruction of historic buildings, the Rector floor is used as a replacement for wooden beam ceilings. The lower dead weight compared to monolithic ceilings reduces the loads on existing masonry. The system makes it possible to preserve historical floor levels with a minimum structural height of 240 mm.

Adaptations of attics for residential purposes often use Rector lightweight ceilings to reinforce the existing structure. The ability to transport the elements through stairwells eliminates the need to dismantle the roof. The system allows the work to be carried out in stages without having to uproot the residents of the lower floors.

Technical parameters of the Rector ceiling

The Rector floor is characterized by a structural height of 240 mm, consisting of beams 180 mm high and a layer of over concrete 60 mm thick. The axial spacing of the beams is 625 mm as standard, which corresponds to the modular width of the blocks of 600 mm. The minimum thickness of the over concrete over the beams according to the structural requirements is 40 mm with concrete of class C20/25.

Material specifications of the components

The floor beams of the Rector system are manufactured from concrete of class C30/37 with a characteristic compressive strength of fck = 30 MPa. The main reinforcement is ribbed bars BSt500S with yield strength fyk = 500 MPa. Stirrups made of BSt500 steel with spacing adapted to the lateral forces, but not more than 250 mm.

Concrete blocks are made of concrete class C25/30 with a density of 2200 kg/m³. Nominal dimensions of the blocks: length 330 mm, width 600 mm, height 180 mm. The weight of a single hollow block is about 28 kg. Compressive strength perpendicular to the laying surface minimum 3.5 MPa.

Strength parameters of the Rector floor

The characteristic load capacity of the Rector floor with a modular span of 6.0 m is 3.5 kN/m² for imposed load. The limit deflection does not exceed L/250 at full characteristic load. Design bending moment MRd = 45-85 kNm/m depending on the reinforcement scheme. Shear resistance VRd = 35-55 kN/m at support.

Exposure class XC1 according to EN 206 defines a dry or permanently wet environment. Concrete’s W8 water resistance provides protection against water penetration at a pressure of 0.8 MPa. Frost resistance F150 guarantees resistance to 150 cycles of freezing and defrosting. Class A1 reaction to fire – non-flammable product in accordance with PN-EN 13501-1.

Dimensions and weights of system components

The Rector floor system offers beams with modular lengths from 2.4 to 8.0 m with gradations of 20 cm. The top width of the beam is 120 mm, the bottom width is 140 mm. The weight of the beam varies from 32 to 40 kg/mb, depending on the degree of reinforcement. The surface area of the floor after laying the elements is about 1.65 m²/mb of beam.

Consumption of materials

Installation of the Rector ceiling – substrate preparation

The Rector floor requires careful preparation of the supports before laying the beams. The reinforced concrete footings should be leveled to an accuracy of ±5 mm along their entire length. The support surface should be leveled with M10 cement mortar at least 24 hours before installation. The width of the support of the beams on the masonry or ring beam is a minimum of 100 mm for spans up to 6.0 m and 120 mm for larger spans.

Before laying the Rector system elements, it is necessary to make a temporary installation support. Steel or wooden stamps are set at a spacing of no more than 2.0 m for ceiling spans up to 4.5 m and 1.5 m for longer spans. The load capacity of the stamps is selected for a minimum load of 15 kN, taking into account the dead weight of the ceiling and installation loads.

Transport and storage of elements on site

Rector floor beams are delivered to the construction site by truck transport in packages of 10-15 pieces. Unloading is carried out with a truck crane or manually for beams up to 4.0 m long. Storage of beams is carried out on a level, paved surface, on wooden spacers spaced every 2.0 m.

Concrete blocks of the Rector system are transported on pallets of 36-48 pieces secured with foil. The unloading of pallets is carried out with a forklift or HDS directly to the assembly floor. Storage of blocks should be done in a way that protects them from moisture and mechanical damage.

Laying of Rector beams and blocks

Installation of the Rector floor begins with the placement of the outermost beams against the walls. The first beams are placed at a distance of 50 mm from the face of the wall, filling the space with concrete when concreting the rims. Subsequent beams are placed at an axial spacing of 625 mm, controlling the parallelism and level of the upper surfaces.

The blocks are laid perpendicular to the beams, starting from the gable wall. Rector system elements are pressed between the ribs of the beams with a minimum clearance of 5 mm. Cut-to-size blocks or monolithic concrete fill are used at the walls. The last row of hollow blocks at the opposite wall is cut with a concrete saw.

Supplementary reinforcement and installations

After laying all the Rector floor elements, reinforcement of the perimeter rims is carried out with 4φ12 bars with φ6 stirrups every 250 mm. Above the intermediate supports, 2φ12 overhead reinforcement is laid for a length of 0.2 of the span. Distribution mesh φ4.5 with a mesh of 150×150 mm is laid over the entire floor area with a minimum overlap of 100 mm.

Installation penetrations in the Rector ceiling are made before concreting by drilling holes in the blocks. Holes up to 160 mm in diameter do not require additional reinforcement. Larger penetrations up to 400 mm are made by omitting the hollow block and concreting with additional reinforcement of the edges of the hole with 4φ12 bars.

Concreting the layer of superconcrete

Concreting of the Rector floor is carried out with concrete of class C20/25 of consistency S3. The concrete mixture is fed with a pump or crane in order from the farthest point. The thickness of the layer of over-concrete is a minimum of 40 mm above the beams, controlled with the help of steel repointers.

The compaction of concrete in the Rector floor system is carried out with depth vibrators with a diameter of 35-45 mm of the roll. Particular attention is paid to accurately fill the spaces between the beams and the blocks. The surface is leveled with a vibrating batten or by hand, giving the appropriate slopes according to the design. Care of concrete for 7 days consists in maintaining moisture by covering with foil or spraying with water.

Below are solutions on how to lay the ceiling. If you are interested, please ask us for detailed instructions.

Beam laying

  • Rector beam as a structural element should be laid one next to the other (at 59 or 60 cm spacing),
  • Observe the minimum depths of the backrests (only 5 cm),
  • for proper spacing of beams, place a hollow block at each end
    decl.
    . Decked blocks are included in each pallet in several pieces

Ceiling support

Learn the advantages of how Recktor ceilings are made. Here’s how the beam should be supported depending on whether it’s on masonry, on a shaped beam, on a lowered rim, new or old masonry, on a stringer, tension, PPR (prefabricated) stringer or steel I-beam

RECTOR oparcie stropu

Mounting supports

  • For support, a 7 × 14 cm section of the wooden support strip is recommended. A wooden girder can also be used,
  • The support should be propped with punches in such a way as to achieve a negative deflection arrow equal to L/500 (where L = clear span of the walls),
  • When installing mounting supports, do not force a greater inverse deflection arrow than the value of L/500. It is not allowed to use beams that show “positive” deflection before installation,
  • It is advisable to lay the supports on a level and hardened surface. In the case of support on a lower ceiling, it is recommended to use plank foundations,
  • With the RECTOR supportless system, there is no need for mounting supports,
  • it is recommended that the ceilings on the lower floors be adequately supported during work on the upper floors

Support spacing

    • learning about the advantages of prestressed ceilings, it is not difficult not to notice that in these ceilings there is a small number of supports
    • With one support, it should be set at the mid-span of the ceiling,
    • With two supports, the supports should be set at distances of 1/3 – 1/3 – 1/3 or 2/5 – 1/5 – 2/5 of the span. This is according to the installation drawing provided,
    • The number and location of mounting supports must not be changed.
    • In the design you receive from us, the exact location of the supports is drawn in,

RECTOR rozstaw podpór

You will receive a detailed Contractor’s Guide with your order for rectobrete ceiling or rectolight ceiling (rector light ceiling), in which everything is accurately and pictorially presented. We hope that through our review you have learned the advantages of prestressed prestressed prestressed concrete ceilings

Rector ceiling price – comprehensive cost calculation

The Rector floor is priced at a competitive level with other floor systems on the market. The total cost of the ceiling includes not only the price of prefabricated elements, but also the cost of transportation, installation and supplementary materials. For investments implemented in 2024, the price per square meter of the ceiling varies within a range determined individually for each project.

Rector ceiling price per square meter is mainly influenced by the span of the ceiling and the required load-bearing capacity. Ceilings with a standard span of up to 4.5 meters have the most favorable ratio of price to technical parameters. For larger spans up to 8.0 meters, the Rector ceiling price increases in proportion to the increased use of reinforcing steel in the load-bearing beams.

Cost structure of the Rector system

When analyzing the Rector floor price per square meter, the cost of the floor joists should be taken into account, accounting for about 45% of the total value. Concrete blocks account for another 25% of the cost, while concrete for the superconcrete layer and supplementary reinforcement make up a total of 15% of the value. The remaining 15% is the cost of transportation and possible installation, with the Rector floor price of transportation depending on the distance of the construction site from the production plant.

In 2025, the price level of Rector system components is forecast to remain stable. Ceiling Rector price may be subject to slight adjustments related to fluctuations in raw material prices, especially reinforcing steel and cement. However, manufacturers offer loyalty programs and quantity discounts to optimize Ceiling Rector price per m2 for larger orders of more than 500 m².

Rector ceiling price – comparison with alternatives

The price competitiveness of the Rector floor is particularly evident when compared with traditional monolithic floors. Eliminating the cost of full formwork and shortening the execution time translates into savings of 20-30% in the total budget for the construction of the floor. Rector ceiling price per m2 is also favorable when compared to filigree ceilings, offering similar technical parameters with lower investment.

For individual investors, the Rector price ceiling is the optimal solution for the construction of single-family houses. The system makes it possible to stage payments – first for the beams and blocks, then for the materials for the superconcrete. Such a structure Rector ceiling price per m2 makes it easier to manage the construction budget and adjust expenses to financial possibilities.

Optimize costs when choosing the Rector system

Reduction of ceiling Rector price is possible through proper planning of delivery logistics. Ordering a set of elements for an entire floor allows you to obtain more favorable pricing conditions and minimize transportation costs. The price lists for 2024 show seasonal discounts, especially attractive in autumn and winter, when the Rector ceiling price per m2 can be lower by up to 10%.

The final Rector ceiling price is also influenced by the choice of the concrete class for the superconcrete layer. Using C20/25 concrete instead of higher grades can reduce costs by about 5-8% without compromising the strength parameters of the floor. In addition, with cooperation with local ready-mix concrete plants, you can negotiate the Rector ceiling price per m2 including the cost of delivery of the concrete mix.

Long-term profitability of investment in Rector floor

Analyzing the Rector floor price in the perspective of the entire life cycle of the building, the system shows significant economic advantages. The durability of precast concrete products guarantees trouble-free operation for a minimum of 100 years without the need for costly renovations. In 2025, additional financing programs preferring precast solutions are expected to be introduced, which will further affect the attractiveness of the Rector ceiling price per m2.

The added value of using the Rector system exceeds the simple calculation of the Rector ceiling price. A 30-40% reduction in construction time compared to monolithic ceilings means a faster return on investment for developers. For individual investors, the Rector ceiling price per square meter means the ability to move in earlier and reduce the cost of renting replacement housing during construction.

Individual pricing for the Rector ceiling

Precise determination of the Rector floor price requires an analysis of the project documentation and the specifics of a particular project. Factors affecting the final price include the location of the construction site, access conditions for heavy transport and the possibility of storing the elements on site. Ceiling Rector price per m2 is calculated individually taking into account all design and logistics variables.

Professional technical advice on the selection of the optimal system variant allows you to optimize the ceiling Rector price without sacrificing the required technical parameters. Current price lists for 2024 and forecasts for 2025 are available after contacting the technical and commercial department. Comprehensive service includes not only pricing, but also support at the stage of design and implementation, guaranteeing the most favorable relationship Rector ceiling price per m2 to the obtained quality and durability of the structure.

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Here are just some of our implementations of Rector floors. This list includes only large investments on which our prefabricated products have appeared.

The Rector floor is a long-span dense ribbed floor system consisting of prestressed concrete beams and concrete blocks. It is characterized by quick installation, a small number of supports and the possibility of application in various types of buildings, from single-family houses to public buildings.

120-330 zł / m2

Span up to 10 m, structural height 16-34 cm, over concrete 4-7 cm, beam spacing 59-60 cm

Single/multi-family buildings, public buildings, commercial buildings

1-2 mounting supports, no keying, fire resistance REI 30-240, no distribution ribs

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