Design Concepts of Steel Structure Industrial Buildings

Amid the broader shift of the construction industry toward greener and more industrialized development, steel prefab buildings—serving as core building materials for industrial plants, commercial buildings, and similar facilities—are experiencing steadily growing market demand.

Functional suitability is the primary principle in the design of engineered buildings. The design must be closely aligned with an enterprise's production processes and workflows to ensure that the building space fully matches operational requirements.

On one hand, the spatial layout of the factory should be accurately planned based on production line dimensions, equipment installation needs, and material handling routes. This includes determining appropriate building spans, column spacing, story height, and crane girder load capacities. For example, heavy machinery manufacturing plants typically require large spans (usually 24–36 meters), high clear heights (8–12 meters), and crane systems with lifting capacities of 30–50 tons. In contrast, light electronic assembly plants can adopt smaller column spacing, optimize space utilization, and add mezzanine floors for offices or metal sheds storage.

On the other hand, special requirements of different production processes must be taken into account. Chemical plants require enhanced corrosion protection, such as fluorocarbon coatings or galvanized steel components. High-temperature steel workshop build need ventilation skylights and thermal insulation layers to prevent steel members from deforming due to temperature variations. Clean workshops, meanwhile, demand strict control over the sealing of steel structure joints to reduce dust accumulation and ensure that the production environment meets cleanliness standards.

The safety design of prefab workshop steel structure must comprehensively address three key dimensions—load-bearing safety, fire safety, and seismic safety—to ensure structural stability throughout the entire life cycle of the building.

In terms of load-bearing safety, precise structural calculations are required to select appropriate steel grades and optimize connection details. For example, rigid connections are commonly adopted at beam–column joints to ensure effective force transfer. Shear-resistant bolts are added to the connections between crane girders and steel columns to prevent loosening caused by load-induced vibrations.

Fire safety is one of the main challenges of steel structures and should be addressed through a combination of passive fire protection and active fire protection. For passive protection, fire-resistant coatings are applied to steel members—thin coatings are suitable for areas with temperatures up to 500 °C, while thick coatings are used in high fire-risk zones. Alternatively, fire-resistant boards can be used to encase steel members, ensuring that the structure maintains its load-bearing capacity for at least 1.5 hours during a fire. For active protection, automatic sprinkler systems and fire alarm devices should be properly installed to shorten fire response time and control fire spread effectively.

Seismic safety must be designed in accordance with the seismic intensity of the building location. This involves optimizing the distribution of structural stiffness and applying the design principles of 'strong columns, weak beams'and 'strong joints, weak members.' In addition, energy-dissipation or damping devices can be installed at column bases to reduce seismic energy transmission and enhance the building's overall earthquake resistance.