C purlins are an essential component in modern construction, providing structural support and stability for roofing and walls. These steel sections come in a variety of sizes and shapes to meet the specific needs of different building designs. In this article, we will focus on four common sizes of C purlins – 100mm, 150mm, 200mm, and 250mm – and delve into their span capabilities. We will explore the benefits and limitations of each size, and provide insights into how to determine the appropriate span for your project. Whether you are a builder, engineer, or homeowner, understanding the capabilities of C purlins is vital for safe and efficient construction. So, let’s dive into all the details about a 100
How far can a 100mm, 150mm, 200mm & 250 mm C purlin span
A C purlin is a hot-rolled structural steel member with a C-shaped cross-section. It is commonly used in building construction as a secondary framing element to support roof and wall panels, and as a part of a structural roof truss. The span, or distance between two supports, of a C purlin determines its load-carrying capacity and is an important factor in determining its application in a construction project. In this article, we will discuss how far a 100mm, 150mm, 200mm, and 250mm C purlin can span.
100mm C Purlin Span:
A 100mm C purlin has a depth of 100mm, and the distance between the two flanges (legs) is 50mm. This type of purlin is commonly used in small to medium-sized sheds, garages, and carports. The span of a 100mm C purlin depends on the thickness of the steel and the type of loading it will be subjected to. For example, a 100mm purlin made from 1.2mm thick steel can span up to 3.5 meters when supporting a roof load, and 4 meters when supporting a floor load.
150mm C Purlin Span:
A 150mm C purlin has a depth of 150mm, and the distance between the two flanges is 64mm. It is commonly used in larger buildings such as warehouses, factories, and commercial buildings. The span of a 150mm purlin also depends on the thickness of the steel and the type of loading it will be subjected to. A 150mm C purlin made from 1.6mm thick steel can span up to 6.5 meters when supporting a roof load, and 7 meters when supporting a floor load.
200mm C Purlin Span:
A 200mm C purlin has a depth of 200mm, and the distance between the two flanges is 64mm. This size is commonly used in medium to large-sized industrial and commercial buildings. The span of a 200mm purlin again depends on the thickness of the steel and the type of loading it will be subjected to. A 200mm C purlin made from 2mm thick steel can span up to 8 meters when supporting a roof load, and 8.5 meters when supporting a floor load.
250mm C Purlin Span:
A 250mm C purlin has a depth of 250mm, and the distance between the two flanges is 75mm. This size is used in very large structures such as warehouses, hangars, and industrial buildings. The span of a 250mm purlin depends on the thickness of the steel and the type of loading it will be subjected to. A 250mm C purlin made from 2.3mm thick steel can span up to 10 meters when supporting a roof load, and 10.5 meters when supporting a floor load.
It is important to note that the span of a C purlin also depends on the type of connections used, spacing between the purlins, and the quality of installation. It is recommended to consult a structural engineer to determine the appropriate purlin size and spacing based on the specific requirements of a project.
In conclusion, the span of a C p
How far can a 100mm C purlin span
A C purlin is a versatile building material commonly used in the construction industry. It is a type of steel beam that has a distinct shape resembling the letter “C”. C purlins are often used as secondary structural members in roofs, walls, and floors of buildings and can provide structural support and stability to the overall structure.
The span of a C purlin is the distance between two points of support, such as the distance between two columns or beams. The span of a C purlin depends on various factors such as the degree of slope, spacing between the purlins, type and thickness of roofing material, and the load it is intended to carry. In this article, we will look at the span capabilities of a 100mm C purlin.
A 100mm C purlin has a standard height of 100mm and a base width of 50mm. It is available in various thicknesses, ranging from 1.5mm to 3.0mm. The span of a 100mm C Purlin will also vary depending on the type and weight of materials supported by the purlin.
For light residential roofs, with a roof slope of 10 degrees or less, a 1.5mm thick 100mm C purlin can span up to 1.8m, while a 3.0mm thick purlin can span up to 3.2m. For roofs with a slope of 15 degrees or more, a 1.5mm thick purlin can span up to 2.1m, while a 3.0mm thick purlin can span up to 3.5m.
In commercial buildings, the span capabilities of a 100mm C purlin also depend on the spacing between the purlins. For example, for a spacing of 1.2m, a 1.5mm thick 100mm C purlin can span up to 3.6m, while a 3.0mm thick purlin can span up to 6.4m. However, for a spacing of 2.4m, the span capabilities decrease to 2.5m for a 1.5mm thick purlin and 4.7m for a 3.0mm thick purlin.
For industrial buildings, where heavier loads are expected, the span capabilities of a 100mm C purlin are further reduced. For a spacing of 1.2m, a 1.5mm thick 100mm C purlin can span up to 2.6m, while a 3.0mm thick purlin can span up to 4.4m. For a spacing of 2.4m, the maximum span decreases to 1.5m for a 1.5mm thick purlin and 3.5m for a 3.0mm thick purlin.
It is important to note that these span capabilities are based on specific design factors and may vary depending on the actual building design. In addition, the span capabilities of a C purlin can be increased by using additional supports or by using thicker purlins. It is best to consult with a structural engineer to determine the exact span capabilities for your specific building project.
In conclusion, a 100mm C purlin can span
How far can a 150mm C purlin span
A 150mm C purlin, also known as a cold-formed steel purlin, is a structural member commonly used in the construction of buildings to support the roof or wall sheeting. It is made of cold-formed steel, which has been rolled and formed into the desired shape.
The span of a 150mm C purlin refers to the distance between two points of support where the purlin is placed. In simpler terms, it is the length of the purlin that is unsupported and spans between two structural elements, such as walls or columns.
The span capacity of a 150mm C purlin is dependent on various factors such as the material type, thickness, loading and spacing of the purlins, and the design of the structure. The span capacity also varies depending on the building codes and regulations of the specific region where the construction is taking place.
The National Building Code of India (NBC) is a widely used reference code for the design of buildings in India. According to the NBC, the maximum recommended distance between two supports for a 150mm C purlin should not exceed 4.2 meters (13.8 feet). This applies to purlins with 1.2mm thickness and a design load of 2.4kN/m at mid-span.
The span capacity can be increased by reducing the loading on the purlin or by increasing the thickness of the purlin. For example, if the purlin is supported by a column or wall at its mid-span, the maximum recommended span can be increased to 6 meters (19.6 feet) for the same thickness and loading conditions.
Furthermore, in high wind or seismic regions, the NBC recommends reducing the maximum span by 25%. This is to ensure the safety and stability of the structure in case of extreme weather events.
It is essential to note that the span capacity of a 150mm C purlin also depends on the type of roof or wall sheeting used. If lightweight sheeting is used, the purlin can span longer distances than if heavy or thick sheeting is used.
In conclusion, the span capacity of a 150mm C purlin can vary depending on the design conditions and building codes. It is crucial to consult with a qualified structural engineer to determine the appropriate span for a specific project to ensure the safety and stability of the structure.
How far can a 200mm C purlin span
A 200mm C purlin is a commonly used structural member in building construction. It is made of cold-formed steel and has a C-shaped cross-section. The span of a 200mm C purlin is the distance between two supports, such as beams or columns, that the purlin can safely bear without bending or buckling.
The maximum span of a 200mm C purlin depends on various factors such as the type of steel used, the spacing between supports, and the design loads. In general, the larger the span, the larger the purlin section and/or the closer the support spacing needs to be.
According to the New Zealand Steel’s Purlin Design Guide, the maximum span for a 200mm high C purlin with a thickness of 1.5mm is approximately 5.4 meters when supporting roof loads only. If the purlin is also supporting ceiling loads, the maximum span reduces to 3.9 meters. These spans assume that the purlin is continuous over at least two equal spans and that the purlin is restrained against lateral torsional buckling.
For longer spans, additional supports or larger purlin sections will be required to meet structural requirements. It is important to note that the maximum span may also vary depending on the specific building codes and standards of the region where the construction is taking place.
In addition to the span of the purlin, it is also important to consider the spacing between purlins. Close spacing of purlins provides better support and reduces the need for larger section sizes, allowing for longer spans. However, this may increase the cost of the structure. Therefore, it is essential to conduct a thorough structural analysis to optimize the purlin spacing and span for a specific project.
In conclusion, the span of a 200mm C purlin can vary depending on multiple factors, but it is typically limited to 5.4 meters for supporting roof loads only. It is crucial to consult with a structural engineer to determine the appropriate purlin size and spacing for a specific construction project to ensure a safe and cost-effective design.
How far can a 250mm C purlin span
A C purlin is a type of structural member commonly used in the construction industry for providing support to roof and wall panels. It is created by rolling thin metal sheets into a C shape. The width of the C shape is referred to as the purlin’s web, and the distance between the purlin’s flanges is known as its depth. In this case, a 250mm C purlin has a width of 250mm and a depth of unknown size.
The maximum span a 250mm C purlin can achieve is affected by several factors, including the type and thickness of the material used, the purlin’s spacing, and the type of load it is expected to carry. Generally, purlins are made from materials such as steel, aluminum, or timber, and their thickness varies from 1mm to 8mm.
For a steel 250mm C purlin with a thickness of 2mm and a yield strength of 300MPa, the maximum span length is approximately 6.2 meters when it is spaced 1.2 meters apart. This span is suitable for a roof pitch of 25 degrees and a load of up to 3.5 kilonewtons per meter (kn/m). However, if the thickness of the purlin is increased to 3mm, the span can be extended to 8.4 meters.
On the other hand, an aluminum 250mm C purlin with a thickness of 1.6mm and a yield strength of 215MPa can achieve a maximum span of about 4.7 meters when spaced 1.2 meters apart. Similar to steel purlins, the span length can be increased to 6.4 meters by increasing the thickness of the purlin to 2.5mm.
It is essential to note that the spacing between purlins also affects the maximum span length. A smaller spacing, such as 0.9 meters, would result in a shorter span compared to a wider spacing, such as 1.5 meters. Additionally, a higher load would require a shorter span length, so it is crucial to consider the expected load while determining the purlin span.
In summary, the maximum span of a 250mm C purlin can vary and depends on several factors such as material type, purlin thickness, spacing, roof pitch, and expected load. It is crucial to consult a structural engineer to determine the appropriate purlin span for a specific project to ensure safety and stability.
Conclusion
In conclusion, understanding the span capabilities of different sized C purlins is essential for any construction project. The 100mm, 150mm, 200mm, and 250mm C purlins all have their own unique characteristics and strengths, making them suitable for various types of structures and loads. It is important to carefully consider the load requirements and structural design when selecting the appropriate C purlin span. With proper planning and installation, these versatile purlins can provide reliable support and contribute to the overall strength and stability of any building.