In the construction industry, reinforced concrete purlins are vital because they give floors and roofs in a variety of building projects the support they need. These structural components, which help distribute loads and guarantee a structure’s stability, are well-known for their strength and durability. For builders, engineers, and architects, knowing the various kinds of reinforced concrete purlins and how to use them can be essential.
Reinforced concrete purlins come in a variety of forms, each intended to satisfy particular demands and circumstances. Rectangular, T-shaped, and L-shaped purlins are a few common shapes. Professionals can select the best option based on the requirements of the project thanks to these variations that allow for flexibility in design and construction. Every variety has a unique set of technical attributes that impact its functionality and appropriateness for various uses.
Purlins made of reinforced concrete have a wide range of applications in residential, commercial, and industrial buildings. They are frequently utilized in the framework of homes built for residential use to support the floors and roofs. Purlins are crucial for supporting heavier loads and wider spans in commercial buildings. Reinforced concrete purlins provide industrial buildings like factories and warehouses with strength and durability to withstand the weight of heavy machinery and equipment.
Purlins made of reinforced concrete must be installed precisely and with great care. The procedure entails setting the purlins in specified locations and making sure they are securely fastened and aligned. To ensure that the purlins are installed correctly, this task frequently calls for the use of cranes and other heavy machinery in addition to skilled labor. A safe and long-lasting structure depends on proper installation, which makes it a vital component of any building project.
| Type of Reinforced Concrete Purlin | Technical Characteristics, Scope of Application, and Installation |
|---|---|
| Precast RC Purlin | Made in a factory, these purlins offer consistent quality. Ideal for rapid construction, they are strong and durable, perfect for use in commercial buildings and warehouses. Installation is straightforward, usually involving lifting into place with cranes. |
| Cast-in-Place RC Purlin | Poured and cured on-site, these purlins provide flexibility in design and size. Suitable for custom or complex structures like bridges and overpasses. Installation requires formwork and proper curing time, making it more labor-intensive. |
| Prestressed RC Purlin | These purlins are pre-tensioned to improve strength and load capacity. Often used in large-span structures like stadiums and industrial buildings. Installation involves precise tensioning equipment to ensure optimal performance. |
| Composite RC Purlin | Combines concrete with steel or other materials for enhanced performance. Used in modern architectural designs and high-rise buildings. Installation is complex, requiring careful alignment and securing of multiple materials. |
Purlins made of reinforced concrete are crucial structural components that hold up floors and roofs in buildings. The various varieties of reinforced concrete purlins, along with their technical details, real-world uses, and installation techniques, are examined in this article. We’ll go over the salient features of each type, talk about typical applications and locations, and offer a comprehensive installation guide to guarantee longevity and structural integrity. Regardless of your background in building or architecture, or just your general interest in construction, this guide will provide you with a thorough understanding of reinforced concrete purlins.
Application area
Dense concrete grades ranging from M200 to M600 are used to make beams, also known as reinforced concrete purlins. This material offers the highest resistance to fire, frost, water, and crumbling.
Concrete purlins serve as the supporting framework for a variety of small buildings made of different kinds of bricks or blocks, such as administrative and residential structures.
- In the form of a base that is laid under a layer of slabs between floors. This is especially common in those buildings where the load-bearing walls do not have good resistance.
- As a reinforcement of the rafter system.
- As reinforced concrete lintels, which are located above wide doorways and windows. This method of application allows you to relieve the load on this area.
- As part of the structure in flat roofs, when the slope is less than 5%.
- As an element that connects two parts of one building.
- To create technological recesses.
The majority of buildings that use reinforced concrete purlins are classified into a few different categories. Among them are:
- unheated buildings, the roof lies directly on the concrete purlins;
- heated buildings, the roof is laid on insulated slabs;
- heated buildings, where there are small enclosing structures.
It is vital to understand the circumstances surrounding the use of this building material. Beams, for instance, can tolerate temperature variations outside of -40 to +50º. Buildings in an area with a seismic center are able to withstand vibrations of no more than seven points.
If it is not an aggressive type, it can be freely transferred when exposed to a gas environment. However, as long as the structure is built correctly, any application is acceptable.
Classification
These structures come in a wide range of variations, so it is important to give each direction careful thought. This will make the definition of beams clearer.
By section
The profiles of reinforced concrete can vary by section. One kind is a column with a built-in recess and a rectangular section. The second type is T-shaped; it has a small shelf that can hold slabs and looks like the letter T in part. The last category of purlins consists of those that, when divided into sections, resemble the letter G and have a shelf on only one side.
By shelf shape and reinforcement type
The products also vary in terms of reinforcement type and shape.
- 1PR means that the shelf can be placed relative to the rib at an angle of 90º, and the reinforcement itself is made of longitudinal rods;
- 2PR means that the shelf is perpendicular to the rib, and the reinforcement is prestressed (this feature increases the load-bearing properties of the beam);
- 3PR indicates that the shelf is placed perpendicularly, but the frame is prestressed, since.. it is used to support a roof with a slight slope;
- 4PR indicates that the shelf is at a small angle, the reinforcement is prestressed, while the roof has a large slope;
- 5 PR indicates that the shelf is installed at a small angle, there is a prestressed frame.
Marking
Other kinds of marking are applied in addition to the ones mentioned above. A combination of the following numbers and letters, for instance, could be written on the beam if it had a straightforward rectangular cross-section: PRG 60.2.5-5AIII.
- PRG is an abbreviation meaning cross-section;
- 60 — dimensions in decimeters, in this case it is indicated that the beam is 6 m long;
- 2 – indicates the width (in dcm);
- 5 — height (in dcm);
- 5 — denotes the permissible load (in tons), in this case 500 kg per 1 running. m.
- АІІІ — is the type of reinforcement used.
T-beams are marked differently as well. For instance, if the product states 2ΟΠ-1ΐΆV-Ν, it indicates the following:
- 2ПР — beam type;
- 1 — serial number, which is responsible for the bearing capacity of this reinforcement;
- АТІV — class to which the reinforcement belongs;
- Н — indicates the property of concrete (resistance to various aggressive influences, impermeability).
The material’s permeability is indicated by the letter μ at the end of the marking.
Technical parameters
These products are made from heavy, high-quality concrete. This enables the good bearing quality of this building material.
Every aspect of the structure is chosen separately, and the characteristics of the reinforcement are taken into consideration in addition to its length.
For instance, where the beam length is less than 2.5 meters, concrete with the M200 designation is utilized. Concrete with the M250 mark is most frequently used for reinforcement that is up to 3 meters long.
M300 concrete is used in the production of reinforced concrete beams with a maximum size of 3 to 6 meters; M350 concrete is appropriate for longer structures.
Dense concrete is used to create building materials; this material’s density indicator can reach up to 2500 kg/m³. As a result, the structure weighs 150 kg more. These days, a lot of different parameter construction beams are produced in factories.
The structural integrity of many different types of buildings and infrastructures is largely dependent on reinforced concrete purlins. When combined, the strength of steel reinforcement and concrete provide a dependable way to support floors and roofs. They are a crucial component of contemporary construction due to their robustness, adaptability, and longevity.
Reinforced concrete purlins possess several technical attributes, such as extended lifespan, resilience to external influences, and elevated load-bearing capacity. They are made to fit certain construction requirements and are available in a variety of sizes and shapes. These purlins guarantee stability and safety in industrial facilities, residential developments, and commercial buildings.
Purlins made of reinforced concrete have a wide range of applications. They are extensively utilized in multi-story buildings, sports halls, and warehouses. They can meet a variety of structural and design requirements thanks to their adaptability. Because of their adaptability, they are the material of choice for engineers and architects who want to create strong, long-lasting structures.
Careful planning and exact execution are necessary when installing reinforced concrete purlins. If the purlins are installed properly, they should continue to function well for the life of the building. It is essential to follow industry norms and regulations in order to avert possible problems and preserve the construction’s structural integrity.
All things considered, reinforced concrete purlins are essential to the building sector. Their strength, versatility, and dependability make them a great option for structural support. Builders can optimize the advantages of these crucial components in their projects by being aware of their features, uses, and installation procedures.
