PREFA concrete structure
PREFA Concrete Structures
PREFA-type reinforced concrete structures are building structures where the main load-bearing system consists of prefabricated reinforced concrete elements. This type of structure uses concrete columns and beams to create the frame of the hall. The columns and beams are usually prefabricated and then assembled on site. The concrete frame provides a solid and stable structure capable of bearing heavy loads. This frame is suitable for larger and more extensive halls over 1,000 m2, such as production halls, storage halls, administrative buildings, or sports halls.
Concrete structures are used in the construction of halls for:
- load-bearing frame (columns, trusses)
- load-bearing floor structures – SPIROLY concrete panels
- insulated concrete panels or plinths
- staircases
Concrete structures typically consist of columns, lintels, trusses, purlins, and in multi-storey halls, concrete floor panels. The individual components are manufactured in a factory and then assembled and welded together on site using reinforcement.
We are able to design, supply, and implement first-class reinforced concrete structures and other materials for your projects. We are happy to advise you on any prefabricated hall.
Speed and Efficiency of Construction Thanks to Concrete Structures
High-Quality Concrete Structures
Rely not only on high-quality concrete structures that support the successful realization of your project, but also on easy maintenance or sandwich panels.
Concrete structures are often clad with sandwich panels, which are attached horizontally directly to the load-bearing columns, or vertically to auxiliary steel purlins. Sandwich panels are a suitable element for insulated cladding of production halls and warehouses, sales halls, industrial centers, agricultural halls, and car showrooms. Roof coverings are usually made in a layered manner: trapezoidal sheet metal, thermal insulation, and waterproofing. A more detailed description can be found in the section Layered Flat Roofs with Foil. Drainage is most often solved by internal drains or by means of external downpipes.
Advantages of Concrete Structures:
- Strength and Durability – Reinforced concrete frames provide high strength and durability. Concrete and steel reinforcements together create a robust structure that can withstand heavy loads and external influences such as strong winds, snow, or earthquakes.
- Design Flexibility – Reinforced concrete structures allow flexibility in the design and adaptation of the hall to the customer’s needs. The modular nature of the structure allows for easy expansion, reconstruction, or relocation of the hall in the future.
- High Fire Resistance – Reinforced concrete structures have high fire resistance. Concrete is a non-combustible material, and steel reinforcements create a strong and durable system. This brings a safety advantage, as it reduces the risk of fire spreading and provides enough time for evacuation.
- Low Maintenance Costs – Reinforced concrete frames require relatively low maintenance. Concrete is a durable material and resists the effects of weather conditions. Moreover, it is not prone to destruction in humid environments.
- Another advantage of concrete structures is their partial recyclability.
- The greatest advantage is easy assembly and, related to that, fast construction with a minimum of technological interruptions.
Disadvantages of Concrete Structures:
- A disadvantage of concrete structures in certain cases is their uneconomical nature for smaller hall dimensions.
- Another disadvantage is that, compared to steel structures, they are not as tough and flexible.
- Construction costs are higher than for steel structures.
We are able to evaluate all the advantages and disadvantages of concrete structures. For the advantages, our structural engineer will use concrete to achieve the highest possible utilization, and for the disadvantages, our designer will propose such measures so that the disadvantage does not affect the functionality of the prefabricated hall.
Surface Treatment of Reinforced Concrete Structures
PREFA reinforced concrete structures have a standard concrete surface according to the relevant standards based on ČSN EN ISO 9001 and are assessed based on the conditions for the supply of reinforced concrete frame elements. Prefabricated elements are made from concrete of class C 30/37 or C 40/50 according to the structural design. The main stirrup reinforcement is most often made from R 10 5005 steel, with a minimum reinforcement cover of 25 mm. PREFA reinforced concrete structures are made purely from natural materials; in rare cases, there may be color shade variations on the surface of the structure, which are not a defect and do not reduce the utility properties of the structure and the hall as a whole.
Fire Resistance
Fire resistance in the event of a fire is higher for PREFA reinforced concrete structures than for steel structures. Reinforced concrete structures are generally considered fire resistant due to the combination of covered steel reinforcement with durable concrete. Concrete is known for its high resistance to fire and can withstand high temperatures for a long time without losing its load-bearing capacity. Sufficient coverage of the steel reinforcement ensures high fire resistance.
The fire resistance of reinforced concrete structures is influenced by various factors, such as the composition of the concrete, the quality of the steel reinforcements used, the thickness of the concrete cover, the geometry of the structure, and also the design of the building’s fire protection system.
In many countries, there are regulations and standards that set minimum requirements for the fire resistance of reinforced concrete structures. These standards usually specify how long the structure should withstand fire and maintain its load-bearing capacity. Terms such as "fire resistance R" or "fire resistance F" with a numerical designation expressing the resistance time in minutes are often used. Reinforced concrete structures have a minimum resistance of R30 minutes, with 45 minutes being standard.
Structural Elements
PREFA reinforced concrete structures can easily be supplemented with other prefabricated elements that are part of the delivery of the prefabricated hall. Prefabricated elements include:
- Prefabricated stairs
- Pretensioned ceiling panels – SPIROLY
- Concrete insulated panels
- Concrete plinths, which can be insulated or non-insulated.
Contact Us
PROMO HALY s.r.o. has completed a number of successful projects. Take a look at our news and see for yourself. We offer you high-quality concrete structures and a range of other building elements. Contact us too – we are already looking forward to working with you.
Best References of Concrete Halls
BM plus Warehouse Holešov
Investor: BM plus s. r. o.
Place of implementation: Holešov
Hall type: Warehouse
Dimensions: 20×84×8 m
Warehouse hall with administrative facilities BAUER Logistic Cheb
Investor: Bauer Logistic s. r. o.
Place of implementation: Cheb
Hall type: Warehouse
Dimensions: 30×55×8 m
Production Hall 21C with Canteen ALTECH Uherské Hradiště
Investor: ALTECH, spol. s r. o.
Place of implementation: Uherské Hradiště
Hall type: Manufacturing
Dimensions: 40×40×9 m
Prices of Concrete Halls
A PROMO 1800 type hall – dimensions 30 × 60 m, height 9 m at the parapet (1800 m2 or 14,400 m3) is designed for maximum use of storage space. The price corresponds to the visualization.
A PROMO 1650 hall – dimensions 30 × 55 m, height 7.8 m at the parapet (1650 m2 or 11,500 m3) – is designed for maximum use of storage space. The price corresponds to the visualization.
submit a non-binding inquiryConfigure the hall
