How to build a steel structure warehouse in Lithuania?

By

Canglong Group

How to build a steel structure warehouse in Lithuania?

Canglong Group’s steel structure warehouse project, tailor-made for its Lithuanian client, has a total construction area of ​​875 square meters and is primarily used for industrial raw material storage. The project utilizes a portal frame structure, with Q355B H-beams as the main load-bearing components and C-beams as the purlin system. Canglong Group provided a complete solution from design to installation. This solution fully considers the local climate and storage needs of Lithuania, achieving a balance between structural safety and economy.

Core Structural Design and Material Application

Portal Frame System

The main structure uses Q355B H-beams as steel columns and beams, with a yield strength of 355MPa and a tensile strength ≥470MPa. Finite element analysis was used to optimize node connections, ensuring stability under magnitude 8 earthquakes and force 12 winds.

Purlins and Enclosure System

The roof and wall purlins are made of galvanized C-shaped steel, spaced 1.5 meters apart, paired with 0.5mm thick galvanized color steel sheets (CL51-380-760 type), forming a double-layer sandwich insulation layer (rock wool density 16kg/m³), achieving thermal insulation and waterproofing performance in environments ranging from -20℃ to 50℃.

Corrosion and Fire Protection Treatment

The steel components are sandblasted to remove rust (Sa2.5 grade), then coated with epoxy zinc-rich primer (80μm) and chlorinated rubber topcoat (60μm), achieving a fire resistance limit of 1.5 hours, meeting Lithuanian building fire protection codes.

Construction Process and Quality Control

Modular Prefabrication

95% of the component processing is completed at the factory in Henan, China, including H-beam welding, C-beam punching, and anti-corrosion coating, with errors controlled within ±1mm. Node accuracy is verified through pre-assembly using a BIM model.

On-site Assembly

Foundation Construction: C30 concrete independent foundations (1.5m depth) are used, with M24 chemical anchors pre-embedded to fix the steel columns. The foundation bearing capacity is ≥180kPa.

Main Structure Erection: A 250t crawler crane is used for unit hoisting. The verticality deviation of a single steel frame is ≤H/1000. The final tightening torque of high-strength bolts is 450-500 N·m, and 100% torque wrench testing is performed.

Enclosure Installation: Roof panels are fixed with self-tapping screws (ST5.5×50mm), and the joints are filled with butyl tape. A 500mm wide galvanized water-retaining plate is installed at the eaves.

Acceptance Standards

Based on Lithuanian building codes and Chinese GB50205-2020 standards, the following key tests were conducted:

• UT weld flaw detection pass rate: 100%
• Coating adhesion (cross-cut test ≤ Grade 2)
• Roof rainwater penetration test (no leakage after 2 hours)

Project Advantages and Innovations

Rapid Construction

From site entry to main structure installation completion, only 30 days were completed, shortening the construction period by 60% compared to traditional concrete warehouses, and meeting the customer’s peak season storage needs ahead of schedule.

Cost Optimization

The use of Q355B steel was reduced by 15% compared to Q235B, and the modular design reduced on-site welding, resulting in a 22% reduction in overall cost.

Sustainability

The use of pre-reserved interfaces for photovoltaic brackets and a 5% roof drainage slope are suitable for Lithuania’s rainy climate. The rainwater harvesting system can meet 30% of the green space irrigation needs.

Conclusion

The successful implementation of this project signifies that Chinese steel structure companies have the capability to provide full-chain solutions. Through technological innovation and localized adaptation, Canglong Group has not only provided Lithuanian clients with efficient warehousing space but has also set a benchmark for infrastructure cooperation along the Belt and Road Initiative. In the future, a BIM-based digital operation and maintenance platform will further enhance the intelligence level of warehouses, helping clients achieve their carbon neutrality goals.