GAOERJI STEEL
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GAOERJI provide one-stop steel structure manufacturing services from deep design, high-precision processing to global distribution, with 18 years of industry experience to ensure the safety of the project structure and the best cost. GAOERJI are the real source manufacturers, with independent production base and a full set of automated processing equipment, eliminating middlemen links, to provide you with highly competitive ex-factory prices and faster delivery speed.
Structural steel fabrication services is mainly used in industrial warehouses, multi-storey office buildings, heavy equipment frames and pedestrian overpasses.
The Tekla Structures is used for three-dimensional in-depth design to ensure that the accuracy of each bolt hole and connecting plate reaches 0.5mm, which reduces the error rate of on-site installation by more than 90% and significantly shortens the construction period.
The steel plate is processed by a numerical control multi-head cutting machine, and the edge flatness deviation is controlled within 1mm, which ensures the tightness of the subsequent welded joints and improves the bearing stability and seismic performance of the overall structure.
All structural parts are hot-dip galvanized after pickling. The zinc layer has uniform thickness and strong adhesion, which can resist salt spray and humid environment erosion and extend the maintenance period to more than 20 years.
Relying on 6 professional production lines in the factory, the standardization and modular processing of components are realized, with stable daily production, shortening the delivery cycle by about 30% compared with the traditional processing method, and meeting the urgent project progress.
100% ultrasonic flaw detection (UT) is carried out on the key stressed welds to ensure that there is no slag inclusion, pores or cracks inside, and the welding quality level reaches the first-class standard to ensure the construction safety under extreme loads.
According to the packing scheme of container size optimization components, special steel brackets are used to fix the slender parts, effectively preventing deformation and coating wear during shipping, and ensuring that the goods are loaded upon arrival.
| Attribute Name | Technical Specifications and Standards |
| Main material specifications | H-beams, square tubes, round tubes, angle steel, channel steel |
| Steel grade | GB Q345B, ASTM A572 Grade 50, EN10025 S355JR |
| Welding technology | CO2 gas shielded welding, submerged arc welding |
| Weld grade | Grade I or II load-bearing welds conform to international testing standards. |
| Rust removal grade | Sandblasting rust removal achieves Sa 2.5 level. |
| Coating system | Epoxy zinc-rich primer + micaceous iron oxide intermediate coat + polyurethane topcoat |
| Maximum length of component | Individual components can reach 11.8 meters in length (suitable for 40-foot containers). |
| Quality Control Manual | Provide material specifications, flaw detection report, and paint thickness measurement report. |
Looking for manufacturing partners with international delivery experience, suppliers are required to provide all-round support from drawing deepening to installation guidance to ensure that large-scale industrial projects are delivered on time.
Investors who focus on building standard factories, modern warehouses or logistics parks, focusing on building longevity, fire rating and low post-maintenance costs.
The organization responsible for the construction of urban pedestrian bridges, pipe gallery supports or traffic indicator towers has extremely high requirements for the weather resistance, aesthetics and public safety standards of steel structures.
In the construction of substations, gas station canopies or wind power facilities, customized steel structures with strong corrosion resistance, stable structure and adaptability to extreme geographical environments are needed.
the user needs to provide preliminary architectural drawings, and the GAOERJI engineer will deepen the three-dimensional modeling and submit it to the customer to confirm the final connection node and material details.
during the factory processing, the user should embed the anchor bolts according to the foundation plan provided by us to ensure that the horizontal position and spacing meet the installation accuracy.
After the components arrive at the site, please check against the packing list. The components shall be classified and stacked according to the hoisting sequence to avoid scratches on the surface coating caused by repeated handling.
hoisting shall be carried out according to the installation number sequence, and verticality correction shall be carried out after preliminary fixation. Finalize all high-strength bolts with a torque wrench.
certificate
Welcome to our Frequently Asked Questions page. We have compiled answers to common questions you may have, hoping to provide you with clear and quick solutions. If you cannot find the information you need here, please feel free to contact our customer support team.
GAOERJI provide one-stop steel structure manufacturing services from deep design, high-precision processing to global distribution, with 18 years of industry experience to ensure the safety of the project structure and the best cost. GAOERJI are the real source manufacturers, with independent production base and a full set of automated processing equipment, eliminating middlemen links, to provide you with highly competitive ex-factory prices and faster delivery speed.
Q345B or Q235B carbon steel
Material
Hot dip zinc layer thickness up to 85 microns
Surface treatment
Compliant with ISO 9001 and AWS specifications
Manufacturing standards
The Tekla Structures is used for three-dimensional in-depth design to ensure that the accuracy of each bolt hole and connecting plate reaches 0.5mm, which reduces the error rate of on-site installation by more than 90% and significantly shortens the construction period.
The steel plate is processed by a numerical control multi-head cutting machine, and the edge flatness deviation is controlled within 1mm, which ensures the tightness of the subsequent welded joints and improves the bearing stability and seismic performance of the overall structure.
All structural parts are hot-dip galvanized after pickling. The zinc layer has uniform thickness and strong adhesion, which can resist salt spray and humid environment erosion and extend the maintenance period to more than 20 years.
Relying on 6 professional production lines in the factory, the standardization and modular processing of components are realized, with stable daily production, shortening the delivery cycle by about 30% compared with the traditional processing method, and meeting the urgent project progress.
100% ultrasonic flaw detection (UT) is carried out on the key stressed welds to ensure that there is no slag inclusion, pores or cracks inside, and the welding quality level reaches the first-class standard to ensure the construction safety under extreme loads.
According to the packing scheme of container size optimization components, special steel brackets are used to fix the slender parts, effectively preventing deformation and coating wear during shipping, and ensuring that the goods are loaded upon arrival.
| Attribute Name | Technical Specifications and Standards |
| Main material specifications | H-beams, square tubes, round tubes, angle steel, channel steel |
| Steel grade | GB Q345B, ASTM A572 Grade 50, EN10025 S355JR |
| Welding technology | CO2 gas shielded welding, submerged arc welding |
| Weld grade | Grade I or II load-bearing welds conform to international testing standards. |
| Rust removal grade | Sandblasting rust removal achieves Sa 2.5 level. |
| Coating system | Epoxy zinc-rich primer + micaceous iron oxide intermediate coat + polyurethane topcoat |
| Maximum length of component | Individual components can reach 11.8 meters in length (suitable for 40-foot containers). |
| Quality Control Manual | Provide material specifications, flaw detection report, and paint thickness measurement report. |
Looking for manufacturing partners with international delivery experience, suppliers are required to provide all-round support from drawing deepening to installation guidance to ensure that large-scale industrial projects are delivered on time.
Investors who focus on building standard factories, modern warehouses or logistics parks, focusing on building longevity, fire rating and low post-maintenance costs.
The organization responsible for the construction of urban pedestrian bridges, pipe gallery supports or traffic indicator towers has extremely high requirements for the weather resistance, aesthetics and public safety standards of steel structures.
In the construction of substations, gas station canopies or wind power facilities, customized steel structures with strong corrosion resistance, stable structure and adaptability to extreme geographical environments are needed.
the user needs to provide preliminary architectural drawings, and the GAOERJI engineer will deepen the three-dimensional modeling and submit it to the customer to confirm the final connection node and material details.
during the factory processing, the user should embed the anchor bolts according to the foundation plan provided by us to ensure that the horizontal position and spacing meet the installation accuracy.
After the components arrive at the site, please check against the packing list. The components shall be classified and stacked according to the hoisting sequence to avoid scratches on the surface coating caused by repeated handling.
hoisting shall be carried out according to the installation number sequence, and verticality correction shall be carried out after preliminary fixation. Finalize all high-strength bolts with a torque wrench.