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Prestressed roof elements

Roof purlin

Purlins are roof beams in the form of prestressed reinforced concrete elements. They usually provide direct support for the roof covering. They are supported on girders perpendicular to their placement direction.

Use

→ Industrial halls
→ Storage halls
→ Supermarkets

Grade of concrete
Concrete grade min. C50/60, reinforcement steel grade AIIIN, prestressing steel Y1860
Cross sections
Element with rectangular, trapezoidal, I-beam and inverted T-beam cross-sections
Span
Large span of structure
Costs
Low upkeep costs with no maintenance required
Quality
High-quality elements
Surface
Moulded surfaces and bevelled edges

TECHNICAL DETAILS

Production process of Roof purlin

Prestressed elements can be produced in two ways. Depending on the needs, we use technology that ensures production speed and economic efficiency, with lower consumption of ribbed steel. In the first method, we lay out the complete reinforcement of the element on special production lines designed for producing prestressed elements, through which the prestressing tendons are passed using specialized machines. Then, all tendons are subjected to initial and final tensioning. This process is followed by formwork and concreting of the element. The second method involves laying out the reinforcement components on the production line, through which the tendons are passed. This is followed by pre-tensioning and tensioning to the target force. This is followed by pre-tensioning and tensioning to the target force.

Możliwości produkcyjne płatwi dachowych sprężonych

Production capabilities of Roof purlin

Prefabricated purlins can be made with a rectangular, trapezoidal, I-shaped or inverted T-shaped cross-section. They can be equipped with rails facilitating the installation of roofing and other necessary accessories for connection to other structural elements. The elements can be made as reinforced or prestressed concrete.

Możliwości projektowe płatwi dachowych sprężonych

Design capabilities of Roof purlin

Prefabricated purlins are usually designed using concrete grade C50/60 or higher. Prestressing tendons with a nominal tensile strength of 1860 MPa are used. Prestressed purlins are usually designed in spans of 7 to 18 m, with a rectangular, trapezoidal or T-shaped cross-section, with a height depending on the span.

Transport of Roof purlin

Like other beam elements, purlins are transported in the installation position. Due to their span, they are usually transported on so-called stretch trailers. Depending on the weight of the element, several prefabricated elements can be transported when carefully placed next to each other.

Installation of Roof purlin

Before starting the installation of purlins, characteristic points should be marked on them and their supports. Purlins are usually lifted using slings. The elements are installed on roof girders.

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Od ponad 30 lat specjalizujemy się w produkcji elementów prefabrykowanych dla budownictwa: od mieszkaniowego poprzez obiekty użyteczności publicznej i przemysłowe, po skomplikowane elementy konstrukcji inżynieryjnych, drogowych, mostowych i hydrotechnicznych. Naszym celem jest produkcja najwyższej jakości materiałów budowlanych z betonu, w tym prefabrykatów nietypowych, wykonywanych na specjalne zamówienia dla firm i dla odbiorców indywidualnych, niezależnie od ich rodzaju i wielkości inwestycji.

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