Bolt Assemble Prefab Steel Structure Workshop Warehouse With Sandwich Panel

Bolt assemble prefab steel buildings are mainly divided into three mainstream types for industrial and storage usage, featuring standardized modular design and full bolted connection without on-site welding. The first type is light portal frame steel structure, which is the most widely used type for ordinary workshops and warehouses. It adopts H-section steel columns and rafters, matched with C/Z type steel purlins, with lightweight body, large clear span and high space utilization, suitable for most conventional industrial scenarios. The second type is heavy-duty steel structure, using thickened H-beams and box columns, customized for buildings with overhead cranes, heavy equipment load and high snow or wind pressure requirements, with stronger structural stability and bearing capacity. The third type is mixed steel-concrete structure, which combines concrete short walls at the bottom and steel frame sandwich panel enclosure on the upper part, effectively avoiding wall corrosion caused by rain splash and improving overall durability.

In terms of enclosure materials, there are two core configurations: color steel single sheet and multi-functional sandwich panels. Sandwich panels include EPS, PU and rock wool core materials, respectively focusing on cost performance, thermal insulation and fire resistance. All steel components adopt factory pre-processing, pre-drilling and anti-rust treatment, ensuring unified quality and convenient on-site assembly.

To solve the problems of high temperature, humidity and air turbidity in closed workshops and warehouses, we provide a complete set of supporting ventilation systems for prefab steel buildings. The natural ventilation system includes roof ventilation skylights, ridge ventilators and wall louver vents, which use air convection principle to discharge hot air, dust and peculiar smell without consuming electric energy, suitable for daily ventilation of conventional warehouses. For production workshops with high heat generation, dust and peculiar smell, we configure mechanical ventilation systems, including industrial exhaust fans, axial flow fans and negative pressure ventilation equipment. All ventilation accessories are pre-positioned and reserved during factory production, with reserved installation openings on sandwich panels and steel frames. The ventilation system can effectively adjust indoor temperature and air freshness, improve working environment, and prevent moisture from causing rust on steel structures and mildew on stored goods.

We implement strict full-process quality inspection standards for all bolt-assemble steel structures and sandwich panel enclosure systems to ensure building safety and durability. First is raw material inspection, inspecting steel grade, plate thickness, galvanized layer thickness and core material density of sandwich panels to eliminate unqualified raw materials. Second is semi-finished product inspection, checking the precision of component cutting, drilling and welding, ensuring all bolt holes are perfectly matched for on-site assembly. Third is anti-rust coating inspection, detecting the uniformity and adhesion of primer and topcoat to guarantee anti-corrosion performance. Fourth is finished product overall inspection, testing structural bearing performance, panel waterproofness and dimensional accuracy. Finally, random sampling inspection is carried out before packaging and shipment, with qualified products marked and recorded, and unqualified products reworked in full compliance with standards.

The bolt-assemble prefab steel building adopts fully modular installation, with simple and standardized construction steps. Firstly, complete foundation acceptance and anchor bolt positioning to ensure the foundation level meets construction standards. Secondly, install steel columns and fix them with anchor bolts, then assemble roof rafters, purlins and overall support systems to form a stable main frame. Thirdly, install wall and roof sandwich panels in sequence, seal the joints with special weather-resistant sealant to ensure waterproof and thermal insulation effects. Fourthly, install supporting facilities such as doors, windows, ventilation systems and drainage systems. Finally, check all bolt fastening degrees, overall flatness and waterproof performance, and complete project acceptance. The whole installation process requires no professional welding equipment, greatly shortening the construction cycle and reducing on-site construction costs.

This bolt-assemble prefab steel structure building with sandwich panel enclosure has extremely wide applicability in industrial and commercial fields. It is widely used asindustrial production workshops for machinery processing, electronic assembly, food processing and light industry manufacturing. It also serves as logistics and storage warehouses for factory material storage, commodity turnover and large-scale logistics parks. In addition, it can be used as factory office auxiliary buildings, maintenance workshops, farm breeding houses, factory greenhouses and temporary engineering buildings. With excellent wind resistance, snow resistance, thermal insulation and fire resistance, it can adapt to different climatic environments such as high temperature, heavy rain, strong wind and cold snow in various regions.

First, we adopt full bolted assembly design, completely avoiding on-site welding damage to the anti-rust layer, effectively extending the service life of the steel structure up to 25-30 years. Second, diversified sandwich panel configurations meet different needs of fire prevention, thermal insulation and energy saving, balancing cost and use effect. Third, standardized factory production ensures stable product quality, short production cycle and fast shipment. Fourth, we provide one-stop services including design, production, transportation, installation guidance and after-sales maintenance, solving all customer’s engineering problems. Fifth, all products comply with international building load standards, with professional structural calculation to ensure wind and snow resistance, safe and stable in extreme weather.