GAOERJI STEEL
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Through 100% off-line factory processing and BIM technology, GAOERJI prefabricated steel structures achieve millimeter-level component accuracy and shorten the on-site construction period by more than 40%. GAOERJI have independent research and development and large-scale production base, as a source manufacturer directly to the world, excluding trade differences, to ensure that you get a very competitive factory cost and transparent delivery cycle.
Prefabricated steel structure is mainly used in heavy industrial plants, automated logistics distribution centers, high-rise commercial office buildings and large-span aircraft maintenance warehouses.
integrated BIM modeling and CNC automatic hole cutting technology are adopted to control the connection hole position error of prefabricated parts within 0.5mm. This extreme precision ensures zero rework of bolted connections on site, significantly reducing the total contractor’s secondary labor costs.
all components are subjected to Sa2.5 grade sandblasting and derusting treatment, and sprayed with epoxy zinc-rich primer of not less than 120 microns. This provides prefabricated steel structures with excellent protection against acid rain and high salt spray, extending the first large-scale maintenance cycle to 20 years.
all cutting, welding and drilling processes are completed in the factory, realizing true “dry work” construction. This solves the pain point of strong environmental dependence of traditional site construction, and can still maintain the project progress in rainy season or extremely cold weather.
high-quality alloy steel with high tensile strength is selected, which reduces the steel consumption by 15% under the same bearing capacity than traditional Q235 material. The lightweight structural design not only reduces the cost of foundation construction, but also improves the overall seismic performance by reducing the weight.
Abandon complex field welding, using 10.9-grade large hexagonal high-strength bolt connection technology. This makes the 5000 square meters of prefabricated steel structure only 5-8 workers in 30 days to complete the main assembly, delivery speed 1 times.
Optimize component size for international logistics and develop a dedicated modular rack packaging system. This solves the pain point of high sea damage rate of large components, and ensures that the paint surface of the components is not scratched or collided while fully loaded with containers.
| Technical dimension | Detailed parameter standards | Reference Standard |
| Steel strength | Yield strength ≥ 355 MPa | GB/T 1591 / ASTM A572 |
| Welding quality | Level 1/Level 2 Ultrasonic Non-destructive Testing | AWS D1.1 / GB 50205 |
| Painting system | Epoxy zinc-rich primer + micaceous iron oxide intermediate coat | Film thickness: 120μm – 250μm |
| Wind pressure resistance rating | ≥ 0.85 kN/m² | Withstands typhoon loads of level 16 or higher. |
| Roof drainage | 360° mechanical interlocking seam | Completely eliminate the risk of water leakage |
| Seismic fortification | Intensity of 9 degrees | Flexible energy dissipation support system |
| Fireproof covering | Ultra-thin fireproof coating for steel structures | Meets F1.0 – F3.0 standards |
A general contractor for excellence in engineering quality and demanding lead times. The GAOERJI prefabricated steel structure scheme can effectively reduce the construction risk of the project site and help the engineering party to pass the government’s safety and quality acceptance at one time.
for enterprises that need to complete the construction of large-scale transshipment storage in a short period of time. Our modular prefabrication solution solves the problem of long construction cycle and slow start-up of the traditional transfer center, so that the customer’s business network can be quickly rolled out.
reconstruction or temporary security public construction projects for disaster-stricken areas. The standardized characteristics of prefabricated production solve the pain points of material shortage and shortage of skilled workers, and ensure the quality delivery of livelihood projects within the limit of construction period.
For builders who build facilities in harsh natural environments (e. g. deserts or high frigid zones). The minimalist on-site assembly process of prefabricated steel structures solves the core technical obstacles of poor welding conditions and difficult quality assurance in the field.
provide BIM model deepening and wind and snow load structure checking before sales; In the after-sales stage, the GAOERJI provides traceability codes for each component, and presents spare high-strength bolts and repair paint packages. We are committed to providing 15 years of global insurance services for the main structural defects.
The expected service life of this prefabricated steel structure is 50 to 70 years. In the instructions for use, it is recommended to perform a visual inspection of the structural connections every 5 years and keep the drainage groove clean. Thanks to the high-level corrosion protection process, the structure does not need to be repainted for the first 20 years of service in a conventional environment.
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Through 100% off-line factory processing and BIM technology, GAOERJI prefabricated steel structures achieve millimeter-level component accuracy and shorten the on-site construction period by more than 40%. GAOERJI have independent research and development and large-scale production base, as a source manufacturer directly to the world, excluding trade differences, to ensure that you get a very competitive factory cost and transparent delivery cycle.
Q355B grade high strength steel
Material
maximum single span up to 72 meters
Span range
SA2.5 sand blasting derusting
Surface treatment
integrated BIM modeling and CNC automatic hole cutting technology are adopted to control the connection hole position error of prefabricated parts within 0.5mm. This extreme precision ensures zero rework of bolted connections on site, significantly reducing the total contractor’s secondary labor costs.
all components are subjected to Sa2.5 grade sandblasting and derusting treatment, and sprayed with epoxy zinc-rich primer of not less than 120 microns. This provides prefabricated steel structures with excellent protection against acid rain and high salt spray, extending the first large-scale maintenance cycle to 20 years.
all cutting, welding and drilling processes are completed in the factory, realizing true “dry work” construction. This solves the pain point of strong environmental dependence of traditional site construction, and can still maintain the project progress in rainy season or extremely cold weather.
high-quality alloy steel with high tensile strength is selected, which reduces the steel consumption by 15% under the same bearing capacity than traditional Q235 material. The lightweight structural design not only reduces the cost of foundation construction, but also improves the overall seismic performance by reducing the weight.
Abandon complex field welding, using 10.9-grade large hexagonal high-strength bolt connection technology. This makes the 5000 square meters of prefabricated steel structure only 5-8 workers in 30 days to complete the main assembly, delivery speed 1 times.
Optimize component size for international logistics and develop a dedicated modular rack packaging system. This solves the pain point of high sea damage rate of large components, and ensures that the paint surface of the components is not scratched or collided while fully loaded with containers.
| Technical dimension | Detailed parameter standards | Reference Standard |
| Steel strength | Yield strength ≥ 355 MPa | GB/T 1591 / ASTM A572 |
| Welding quality | Level 1/Level 2 Ultrasonic Non-destructive Testing | AWS D1.1 / GB 50205 |
| Painting system | Epoxy zinc-rich primer + micaceous iron oxide intermediate coat | Film thickness: 120μm – 250μm |
| Wind pressure resistance rating | ≥ 0.85 kN/m² | Withstands typhoon loads of level 16 or higher. |
| Roof drainage | 360° mechanical interlocking seam | Completely eliminate the risk of water leakage |
| Seismic fortification | Intensity of 9 degrees | Flexible energy dissipation support system |
| Fireproof covering | Ultra-thin fireproof coating for steel structures | Meets F1.0 – F3.0 standards |
A general contractor for excellence in engineering quality and demanding lead times. The GAOERJI prefabricated steel structure scheme can effectively reduce the construction risk of the project site and help the engineering party to pass the government’s safety and quality acceptance at one time.
for enterprises that need to complete the construction of large-scale transshipment storage in a short period of time. Our modular prefabrication solution solves the problem of long construction cycle and slow start-up of the traditional transfer center, so that the customer’s business network can be quickly rolled out.
reconstruction or temporary security public construction projects for disaster-stricken areas. The standardized characteristics of prefabricated production solve the pain points of material shortage and shortage of skilled workers, and ensure the quality delivery of livelihood projects within the limit of construction period.
For builders who build facilities in harsh natural environments (e. g. deserts or high frigid zones). The minimalist on-site assembly process of prefabricated steel structures solves the core technical obstacles of poor welding conditions and difficult quality assurance in the field.