Full Bolt Assembled Prefab Steel Workshop Without Field Welding Stable Structure Fireproof Rock Wool Sandwich Panels For Factory Use

The full bolt assembled prefab steel workshop is a new-generation environmentally friendly and efficient industrial building specially developed for modern factory production, processing workshops, industrial storage and comprehensive factory buildings. Different from conventional steel buildings that rely heavily on on-site welding, this product adopts a 100% no field welding design. All steel frames, connection components, wall and roof accessories are completely prefabricated, precision-drilled and surface-treated in the factory. On-site construction only requires bolt splicing and assembly, which thoroughly avoids various quality risks and environmental problems caused by traditional on-site welding operations. With ultra-stable overall frame structure, standardized fireproof system and high-performance rock wool sandwich panel enclosure, this prefab steel workshop delivers outstanding safety, durability and practicality, fully meeting the long-term use needs of various industrial scenarios.

This bolt-up steel building features high integration and modularization. Every component is manufactured according to unified industrial standards, with accurate hole position matching and perfect component fitting. It supports flexible customization of building span, height, length and functional layout, whether it is small-scale processing workshops or large-span industrial production bases, it can achieve a safe, neat and standardized factory building effect. It is widely recognized as a high-cost-performance industrial construction solution for global factory investment and renovation projects.

The core innovation of this prefab steel workshop is the cancellation of all on-site welding procedures, adopting a full high-strength bolt assembly system. Traditional on-site welding is easily affected by weather, construction technology and on-site environment, resulting in welding deformation, welding slag residue, welding crack hidden dangers and uneven structural stress. At the same time, welding operation will produce bright light pollution, smoke and waste residue, which does not meet green construction standards. In contrast, our full bolt assembly mode completely solves the above points.

All steel column and beam connection nodes, support fixing positions and purlin docking parts are pre-processed with standard bolt holes in the factory, with machining accuracy controlled within ±1.5mm. The matched 10.9-grade high-strength structural bolts have ultra-high tensile and compression resistance, which can lock the structural components tightly. The assembled frame has uniform overall stress, no residual structural stress, and will not produce loose nodes or local deformation after long-term use. In addition, the bolt assembly construction is extremely efficient, with no complicated construction equipment required on site, which shortens the project construction cycle by more than 60% compared with traditional welded steel workshops, greatly accelerating the factory’s put-into-use progress.

This prefab factory building adopts a standardized rigid steel frame system with a scientific “strong column and weak beam” structural design, which optimizes the overall force transmission path and greatly improves the structural stability and load-bearing capacity. The main frame is made of national standard Q355B high-strength steel, with excellent toughness, compression resistance and bending resistance, which can bear long-term static load and frequent dynamic load of industrial production equipment and goods stacking. The auxiliary structures such as wall purlins, roof purlins and horizontal supports form a three-dimensional stable force system together with the main frame, effectively enhancing the overall rigidity and anti-deformation ability of the building.

In terms of environmental resistance, the stable steel structure is professionally designed for wind load, snow load and earthquake resistance. It can resist strong typhoons up to level 12, adapt to heavy snow accumulation in cold regions, and withstand magnitude 8 earthquake impact. The overall structure has good ductility and shock absorption performance, which can disperse external impact force and avoid overall collapse or local damage. Moreover, after multi-layer anti-corrosion treatment including shot blasting derusting and weather-resistant paint spraying, the steel frame effectively resists industrial oxidation, moisture erosion and chemical corrosion, with a stable service life of up to 50 years, realizing long-term safe and stable operation of the factory building.

Fire safety is the key advantage of this prefab steel workshop, equipped with a complete set of passive and active fireproof systems, among which A1-grade fireproof rock wool sandwich panels are adopted for all roof and wall enclosure parts, achieving excellent flame retardant and fire isolation effects. The core material of the panel is high-density inorganic rock wool, which is non-combustible, non-smoking and non-melting in case of open fire, completely different from ordinary foam sandwich panels that are flammable and easy to spread fire.

The rock wool core has a professional fire resistance limit of 1.5 to 3 hours, which can effectively block the spread of flame and high-temperature heat flow, prevent fire from spreading rapidly in the factory, and greatly extend the fire fighting and evacuation time. The outer layer of the sandwich panel is made of color steel plate with strong weather resistance and impact resistance, which protects the internal fireproof core material from damage and ensures long-term stable fireproof performance.

In addition to fireproof enclosure panels, the whole steel frame is coated with special structural fireproof paint. The dense fireproof protective layer can isolate high temperature from invading the steel substrate, prevent the steel structure from softening and deforming in high-temperature fire environment, and maintain the overall structural stability of the building during fire accidents. Cooperated with reserved fire evacuation channels, fire doors and configurable automatic fire alarm and spray systems, the whole workshop realizes comprehensive fire protection and meets international industrial factory fire safety standards.

With no on-site welding, stable structure, excellent fireproof performance and fast assembly features, this full bolt assembled prefab steel workshop is widely suitable for mechanical processing factories, electronic manufacturing workshops, food industrial plants, logistics storage warehouses and other industrial scenarios. It not only ensures the safety and standardization of factory production and storage, but also reduces construction costs and later maintenance costs. The modular structure is detachable and relocatable, with high material reuse rate, conforming to green industrial building development trends, and has become the preferred factory construction solution for global industrial enterprises.

Chile Warehouse

This project consists 5 seperate warehouses. Construction was completed in 2025. Location: Santiago, Chile. Dimension : 45mx64.5mx7.36m for each warehouse Supply scope: Tekla detailing , Steel structure fabrication

3D Model by Tekla

Installation in Chile

Philippines Workshop

The multi span workshop were completed in 2023.

Dimension: 80m L * 42m W * 11m H, 3 Spans frame

Supply scope: Design, fabrication of the steel frame, one set of 25 tons double girder overhead crane.

3D Model by Tekla

Installation in Philippines

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