Guojian (Tianjin) Steel Co., Ltd. has specialized in the manufacturing of Rooftop PV Mounting System for years. We operate our own steel structure fabrication workshop and partner with hot-dip galvanizing production lines, handling the cutting and forming of all components—such as columns, main beams, and purlins—in-house. We serve a wide range of parking environments, including industrial complexes, commercial centers, hospitals, schools, and public transport depots. Our technical team provides on-site measurements and parking layout planning, generating structural drawings and arrangement schemes tailored to local wind and snow load requirements. We maintain a steady inventory of raw materials like square tubing and C-sections; standard models ship within 72 hours. All components come with material specifications and galvanizing inspection reports. We offer structural warranties and on-site installation technical support, helping clients create aesthetically pleasing and functional photovoltaic carports.
Our rooftop mounting systems utilize 6063-T5 aerospace-grade aluminum alloy profiles with an anodized finish (oxide film thickness ≥15μm), offering outstanding advantages such as light weight, high strength, corrosion resistance, and rust-free durability. With a density only one-third that of steel, the material is lighter while maintaining equal strength. It also boasts excellent resistance to acid rain, salt spray, and UV radiation, ensuring a service life of over 30 years—even in corrosive environments like coastal or industrial zones—with zero maintenance required over its lifespan. It is the ideal material for rooftop PV mounting system.
We have developed specialized mounting systems for various roof types, creating a comprehensive product range that covers every scenario. For color steel roofs, we use clamp-based installation compatible with various profiles, including angular-rib (snap-lock), standing-seam, and corrugated sheets. Concrete flat roofs utilize either ballasted or chemical anchor mounting methods, avoiding extensive damage to the roof structure. Glazed or clay tile roofs use dedicated hook-style mounts that secure via the tile gaps, leaving the tiles themselves intact. Whether for industrial plants, commercial buildings, or residential homes, we provide suitable installation solutions, eliminating the need for clients to source components from multiple suppliers.
The mounting system for color steel tile roofs utilizes specialized clamps for secure fastening. The installation process requires no drilling into the roof surface, fundamentally eliminating the risk of roof leaks caused by penetrations. The clamps feature internal EPDM waterproof rubber pads that fit snugly against the corrugations of the steel tiles; this design not only increases friction to prevent sliding but also creates a secondary waterproof seal. For concrete roofs where drilling is unavoidable, we provide waterproof sleeves and weather-resistant sealant to ensure the absolute integrity of every fixing point, thereby protecting the roof's waterproofing and relieving owners of concerns regarding leaks.
The roof is the part of a building most exposed to wind loads; wind suction forces in corner and edge areas, in particular, can reach two to three times the magnitude of frontal wind pressure. Guojian Steel’s roof mounting system features a specialized wind-uplift-resistant design. The clamps have undergone rigorous pull-out testing, demonstrating a pull-out resistance of ≥2 kN per clamp. The layout density of the mounts is optimized based on local wind pressure and specific roof zones, with additional fixing points installed in corner and edge areas. All connectors utilize anti-slip serrated nuts and anti-loosening washers to ensure stability against long-term wind-induced vibration, preventing loosening or detachment. The system is capable of withstanding severe typhoons (Category 12 or higher), ensuring safety and reliability.
The Rooftop PV Mounting System is constructed entirely from aluminum alloy. Its self-weight per unit area is only 30%–40% that of traditional steel mounts, significantly reducing the additional load on the roof. For a 1 MW rooftop power plant, the total weight of the aluminum alloy mounting system is approximately 15–20 tons—a reduction of over 30 tons compared to steel mounts—effectively preventing issues such as structural deformation or cracking of the waterproofing layer caused by overloading. For buildings with limited load-bearing capacity, such as older factories or light-gauge steel roof structures, these ultra-light aluminum alloy mounts offer a safe and reliable solution, enabling the full utilization of roofs with power generation potential and ensuring that not a single inch of rooftop space goes to waste.
All roofing mounting components are prefabricated in the factory using a standardized, modular design. On-site installation requires only simple bolting and snap-fitting—eliminating the need for welding, cutting, or secondary processing. Specialized clamps attach directly to the profiled steel roofing, and rails are quickly connected via snap-locks; a single installer can mount over 100 square meters of racking per day, boosting efficiency by more than 50% compared to traditional methods. Supported by detailed installation manuals and video guides, standard installation crews can quickly master the process after brief training, significantly shortening project timelines and reducing labor costs to accelerate grid connection.
We provide end-to-end technical services, ranging from roof surveys to system design. Our technicians conduct on-site measurements of roof dimensions, panel profiles, and load-bearing capacities, generating customized layout plans and structural calculations tailored to actual conditions to maximize roof utilization and installed capacity. Our products come with a 10-year quality warranty and a 25-year service life commitment, backed by 24-hour technical support and on-site installation guidance. All products are supplied with material certificates, test reports, and certificates of conformity, ensuring a worry-free experience for every customer—from procurement and installation to long-term operation.
Address
No. 2, Expressway Auxiliary Road, South Area of High-tech Industrial Park, Zitai Economic and Technological Development Zone, Tianjin, China
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