Corrosion-resistant double-layer steel buildings designed for North American users

Addressing the core needs of the North American market for industrial buildings—rapid assembly, energy efficiency, and compliance—Canglong Group delivered a 28m × 20m × 17m double-story steel structure building. This project integrated high-precision prefabrication and a complete set of component supplies, achieving a seamless connection from design drawings to on-site assembly.

Project Technical Specifications

Building Dimensions: 28m (L) × 20m (W) × 17m (H)

Main Material: Q355B Steel

Beam-Column System: H-beams

Enclosure System: Polyurethane-Sealed Rock Wool Sandwich Panels

Roof Substructure: C-shaped Steel Purlins

Core Structure

High-Strength Frame: The main body uses Q355B low-alloy high-strength steel with a yield strength exceeding 355MPa, ensuring structural stability under North American wind and snow loads. H-beams provide ample column-free interior space, meeting the load-bearing requirements of the double-story layout.

Fire-resistant and thermally insulated enclosure: Walls and roof utilize polyurethane-sealed rock wool sandwich panels. This "sandwich" structure combines the Class A fire resistance of rock wool with the high-efficiency thermal insulation properties of polyurethane, effectively reducing heating and cooling energy consumption and complying with North America's stringent building energy efficiency standards (IECC).

Complete functional kit: The project includes a steel structure staircase, PVC drainage system, industrial roller shutter doors, and sliding windows. All accessories are pre-assembled at the factory, ensuring zero-wait installation on-site.

Why choose this solution?

Strong compliance: Steel materials and welding materials meet ASTM standards, easily passing North American third-party testing.

Dry construction: Components are bolted together, eliminating the need for on-site welding; the double-layer structure can be fully installed within days.

Low life-cycle cost: Rock wool sandwich panels with polyurethane sealing have a service life of over 30 years and extremely low maintenance costs.

The successful delivery of this project once again demonstrates the Canglong Group's delivery capabilities in the field of double-layer steel buildings in North America, providing customers with a one-stop steel structure building solution.