Company Overview and Areas of Expertise
Sazeh Azmoun Foolad Consulting Engineering Company (STS) has been active since 2006, specializing in welding engineering and non-destructive testing (NDT) . As a pioneer in the execution of metal structure engineering projects in Iran, STS relies on its technical knowledge, vast experience, and highly skilled personnel to provide a wide range of services in welding, inspection , and the fabrication of industrial and structural steel frameworks .
Key Areas of Activity:
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Structural design for residential and industrial steel buildings
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Consulting and contractor selection for steel fabrication and erection
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Issuance of certified WPS , WQT , and PQR documents, and welding permits
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Construction and project management of steel structures
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Supervision and quality inspection during fabrication and site erection
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Execution of large-scale metal structure installation projects
The Importance of Metal Structure Projects and STS’s Expertise
With rapid urbanization and growing industrial demands, the need for high-quality, standards-compliant metal structures is more crucial than ever. The durability and safety of steel frameworks in buildings, bridges, towers, and industrial facilities depend on precision in design , rigorous quality control , and professional fabrication .
STS sets itself apart through:
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Use of cutting-edge production and erection technologies
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Skilled workforce and qualified welding engineers
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Comprehensive quality control measures at every stage
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Monthly production capacity of approximately 2,600 tons of steel structures
Emphasizing seismic resistance and gravity load management , STS prioritizes welding inspection and quality assurance . Many structural failures in Iran have been linked to improper welds and poor-quality control—issues that STS systematically eliminates through engineering rigor and continuous monitoring.
Execution Process of Metal Structure Projects
STS adopts a systematic, standard-based approach for the successful execution of metal structure projects. The process includes four key phases:
1. Preliminary Studies and Engineering Design
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Analysis of project needs and load estimations
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Selection of optimal and cost-effective steel sections
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Production of detailed shop drawings and erection plans
2. Fabrication and Component Preparation
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CNC cutting of plates and profiles
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Precision bending, forming, and pre-assembly
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Welding in compliance with WPS/PQR standards and WQT testing
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Execution of destructive and non-destructive tests :
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Ultrasonic Testing (UT)
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Magnetic Particle Testing (MT)
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Radiographic Testing (RT)
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Dye Penetrant Testing (PT)
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Tensile, Bend, and Impact Tests
3. On-Site Installation
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Safe transportation of components to the project site
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Installation based on engineering plans, including:
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Columns, beams, braces, and cross-members
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Final connection control:
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Site welding, bolting, and placement of nuts
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Continuous quality inspections and documentation
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Final inspection and phased NDT until weld traceability certificates are issued
4. Surface Treatment and Coating
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Sandblasting according to standard procedures
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Application of anti-corrosion paint systems or hot-dip galvanization
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Final surface inspection and adhesion and coating thickness tests
Highlighted Metal Structure Projects
STS has successfully executed a wide range of complex steel structure projects across industrial and commercial sectors. Notable examples include:
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Overseas Technical Services Kish Company , column structure project (Garmsar)
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Tehran Railway Square Development , steel framework supply and erection
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Yas Chitgar Residential Complex , with a steel structure weight of ~8,000 tons
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Vosak Tower 3 , located in Tehran, with a weight of ~12,000 tons
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“Aseman” High-Rise Project , 18 floors, ~2,500 tons of steel structure
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Pasargad Commercial-Residential Complex steel framing
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Morvaridshahr Mixed-Use Complex and Refractory Industries HQ Building
These projects showcase STS’s ability to handle large-scale, high-rise, and complex steel structures with precision and speed.
Standards and Quality Control
STS’s commitment to quality is reflected in its full-cycle implementation of the Quality Control Plan (QCP) and the Inspection and Test Plan (ITP) . All operations—design, fabrication, welding, surface treatment, and installation—are governed by international and national standards.
Key Quality Control Practices:
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Issuance of weld identification certificates , including NDT and destructive testing reports
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Preparation of detailed Welding Procedure Specifications (WPS) , Procedure Qualification Records (PQR) , and Welder Performance Qualifications (WPQ)
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Scientific and practical assessment of welder performance
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Documentation of welding calculations , fabrication drawings (DFP) , and quality logs
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Inspection and testing of surface preparation and coating quality , including adhesion and thickness measurement
Why Choose STS for Steel Structure Projects?
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Over 15 years of proven experience in metal structure engineering
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Compliance with ISO, AWS, ASME, and Iranian national codes
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Dedicated QA/QC departments with NDT Level II and III certified experts
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Flexibility to manage both EPC and subcontracted steel structure projects
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Commitment to safety, durability, and environmental compliance