Question
Download Solution PDFWhich of the following types of beams is used for lightly loaded beams such as roof purlins and sheeting rails?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Angle Sections:
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Lightweight: Angle sections are often used for lightly loaded beams like roof purlins, making them cost-effective for smaller, less demanding structures.
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Versatile: They can be used in various configurations, including horizontal, vertical, or sloped, providing flexibility in design.
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Economical: Due to their shape and material efficiency, angle sections are cheaper compared to more complex beam designs, making them ideal for non-heavy duty applications.
Additional Information Castellated Beams:
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Lightweight with High Strength: Castellated beams are designed with a web that is cut and rejoined, making them lighter while maintaining strength, ideal for longer spans.
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Aesthetic Appeal: The design is often chosen for its aesthetic value, as it allows for architectural uniqueness in larger buildings or structures.
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Not Ideal for Light Loads: Castellated beams are typically used for medium to heavy loads, making them unsuitable for lightly loaded applications like roof purlins.
Box Girders:
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High Load-Bearing Capacity: Box girders are typically used for bridges or heavy-duty structures due to their ability to bear significant loads.
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Complex Design: They are more complex in design and fabrication, making them costlier and less suited for light applications like roof purlins.
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Durable: Box girders offer good resistance to torsional forces, making them suitable for situations where rotational forces are present, but not for lightly loaded beams.
Plate Girders:
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Strong Load-Bearing Capacity: Plate girders are used for supporting large loads and are common in bridges, large buildings, and industrial structures.
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Costly and Heavy: Due to their large size and the heavy material used in their construction, plate girders are more expensive and unsuitable for light-load applications.
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Complex Fabrication: Plate girders require specialized fabrication, which makes them less efficient and practical for simpler structures like roof purlins and sheeting rails.
Last updated on Jun 7, 2025
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