Why is load bearing a key element in factory design?
In steel structure factory design, all calculations begin with the load. Loads are the impacts that the structure must withstand throughout its lifespan, from construction to long-term operation.
A factory building may look sturdy in appearance, but misjudging the load can lead to significant sagging, vibration, joint cracking, or rapid deterioration of the structure. Therefore, understanding the correct load is not only important for engineers but also crucial for investors when choosing a factory building solution.
The concept of loads in steel factory structures.
Loads in a factory building are understood as all forces acting on the structure, including permanent forces, temporary forces, and special forces.
In design, loads are not considered individually but are combined according to standard load combinations. This article focuses on the nature and effects of each type of load, without delving into standard formulas.
Common types of loads in factory buildings
1. Self-weight (dead load)
This is the load caused by the weight of the structure itself, including columns, trusses, beams, purlins, roof, retaining walls, and other fixed components.
Dead loads are present throughout the lifespan of a structure and form the basis for calculating other loads. Selecting an appropriate steel cross-section helps to effectively control dead loads and optimize material usage.
2. Roof load
Roof load includes:
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Weight of corrugated iron, panels, and insulation
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Lighting, ventilation, and overhead duct systems.
Although roof loads are usually not large, they are distributed over a wide area and directly affect the rafters and purlins. Underestimating the roof load can lead to structural failure. The hammock exceeded the permitted limit..
3. Wind load
Wind load is important lateral loads This applies to factory buildings, especially those with high ceilings or wide spans.
The impact of wind depends on:
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Construction area
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Building height
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Shape and airtightness of the factory
Wind not only affects the columns but also the bracing and connections. Proper bracing helps stabilize the factory building and reduce lateral displacement.
4. Service load
The load reflects the activity inside the factory, including:
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Workers
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Equipment and machinery
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Stored goods
This load can change over time and depends on the nature of production. In many cases, the load increases when the factory is renovated or its function is changed.
5. Special loads (for reference)
In addition to the loads mentioned above, some factories also experience:
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Heat load (high temperature environment)
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Dynamic load due to machinery vibration
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Earthquake load (varies by region)
The assessment of these loads depends on the applicable standards and the specific requirements of each project.
The influence of load on steel structure solutions
Determinant load:
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Structural type (rigid frame, steel truss, etc.)
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Component cross-section
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Bracing and connection arrangement
Factories with light loads can utilize simple solutions. Conversely, factories with heavy or dynamic loads require more complex and rigid structural solutions.
Common mistakes when assessing loads
In practice, common mistakes include:
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Only consider the current load, ignoring scalability.
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Underestimating wind load and dynamic load.
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The download will not be updated when the functionality changes.
These mistakes can cause the structure to deteriorate quickly or require reinforcement after use.
Loads are fundamental to all steel structure designs for factory buildings. A proper understanding and thorough assessment of loads is crucial for selecting safe, efficient, and sustainable structural solutions.
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