Joint Star Steel Structure Ltd. delivers world-class structural steel fabrication tailored to rigorous engineering standards. Since 2010, our Dhaka-based fabrication facility has processed high-tensile steel plates and hot-rolled profiles into heavy primary frames, built-up columns, roof trusses, and modular building assemblies. Operating under stringent ISO and AWS welding frameworks, we serve industrial warehouse developers, logistics hubs, multistory high-rises, and export infrastructure projects across global markets.
Workshop & On-Site Fabrication Gallery
Real production and site records showcasing our specialized cutting, assembly, welding, and structural member erection.
Standardized 9-Step Fabrication Workflow
Every structural member passes through an integrated manufacturing workflow to guarantee millimeter accuracy, structural integrity, and site-ready erection.
Raw Material Testing
Chemical composition, ultrasonic defect screening, and mechanical yield strength verification against mill test certificates (MTC).
CNC Flame & Plasma Cutting
High-precision multi-torch CNC cutting for steel plates up to 100mm thickness with bevel preparation for deep penetration joints.
Punching & Drilling
Automated CNC beam and plate drilling rigs delivering precise hole patterns for high-strength friction grip (HSFG) bolt connections.
Precision Fitting & Assembly
Jig-assisted spatial alignment of flanges, webs, stiffener plates, and gusset brackets ensuring strict dimensional tolerances.
Heavy-Duty Plate Bending
Hydraulic press brakes forming tapered web sections, cold-formed profiles, and custom facade brackets without micro-cracking.
Automated SAW & GMAW Welding
Submerged Arc Welding (SAW) for H-beam web-flange fillets and flux-cored gas metal arc welding (FCAW) executed by AWS-qualified welders.
Shot Blasting & Painting
Centrifugal shot blasting up to SA 2.5 cleanliness followed by inorganic zinc-rich primers, intermediate epoxies, or hot-dip galvanizing.
NDT & CMM Dimensional Check
Ultrasonic Testing (UT) of primary welds, magnetic particle examination, and 3D digital measurement checks before sign-off.
Fabricated Steel Components & Assemblies
Supplying comprehensive structural packages ready for expedited field bolting without on-site cutting or re-welding.
Built-Up & Tapered H-Beams
Primary frame columns and rafters built from high-tensile plate with optimized weight distribution, delivering clear spans exceeding 60 meters.
Box Columns & Lattice Girders
Engineered for high-rise commercial structures, heavy-duty industrial platforms, and severe wind or seismic hazard zones requiring high torsional rigidity.
Crane Runway Beams & Bracing
Heavy crane runway girders with welded surge plates, crane rails, vertical portal bracing systems, and horizontal tie trusses built for high-duty overhead cranes.
Secondary Structural Purlins
Cold-formed continuous Z and C purlins, roof eaves struts, and side girts galvanized up to 275 g/m² for outstanding atmospheric corrosion resistance.
Industrial Stairs & Mezzanines
Integrated mezzanine frameworks, grating floors, safety handrails, and multi-tier industrial staircase systems fabricated for heavy floor loadings.
Foundation Anchors & Connections
Grade 8.8 and 10.9 high-tensile anchor bolt templates, splice plates, and connection cleats manufactured for error-free foundation integration.
Strict International Engineering Verification
Structural reliability is non-negotiable for overseas procurement directors and structural consultants. Joint Star Steel operates an independent Quality Control (QC) department that enforces rigorous checkpoint inspections at each stage of fabrication.
From chemical analysis of raw plates to non-destructive testing of critical full-penetration butt welds, our documentation ensures complete traceability back to the casting heat numbers.
| Parameter | Specification / Standard | Quality Tolerance / Verification |
|---|---|---|
| Raw Material Grades | Q235B, Q355B (China GB), ASTM A36, ASTM A572 Gr 50, S275JR, S355JR (EN 10025) | Mill Test Certificate (EN 10204 3.1) with yield, tensile, and elongation verification |
| Welding Processes | Submerged Arc Welding (SAW 121), Gas Metal Arc (GMAW 135), Flux Cored (FCAW 136) | Welders certified under AWS D1.1 / EN ISO 9606-1 standards |
| Cutting Precision | CNC Plasma and Oxy-Fuel multi-head profiling up to 100mm plate thickness | Cutting tolerance ±1.0mm, bevel angle ±1.5° |
| Surface Preparation | Centrifugal wheel shot blasting conforming to ISO 8501-1 SA 2.5 cleanliness | Surface profile roughness Rz 40-75 µm for optimal primer adhesion |
| Anti-Corrosion Coating | Inorganic zinc-rich primer, epoxy micaceous iron oxide, aliphatic polyurethane topcoat | Dry Film Thickness (DFT) tested with calibrated magnetic gauges (60µm - 180µm) |
| Dimensional Checking | Beam camber, straightness, depth, and flange squareness verified via laser alignment | AISC Code of Standard Practice / EN 1090-2 execution class tolerances |
| Shipping & Packing | Piece-marked tag matching 3D Tekla model, bundled with protective wooden skids and steel straps | Containerized sea freight (40ft HQ / Open Top) or breakbulk export packing |
Frequently Asked Questions
Direct answers addressing technical compliance, lead times, and fabrication logistics for project owners and engineers.
What quality assurance standards are applied to your steel fabrication?
All fabrication complies with international structural codes including AISC 360 and AWS D1.1 for structural welding. We conduct complete Non-Destructive Testing (NDT) such as Ultrasonic Testing (UT) on full-penetration joints, Magnetic Particle Testing (MT), and Visual Testing (VT). Complete Inspection and Test Plans (ITP) and Mill Test Certificates (MTC) are delivered with every export batch.
Can Joint Star Steel fabricate structures to custom overseas engineering designs?
Yes. Our in-house detailing team uses Tekla Structures and AutoCAD BIM systems to model engineering calculations into accurate shop drawings. We generate NC files for CNC profiling machines and coordinate clear piece marking, part lists, and erection sequencing to match your local installation contractor requirements.
What surface preparation and anti-corrosion finishes do you provide?
All structural members undergo automated shot blasting to SA 2.5 standards to eliminate mill scale and rust. We apply multi-coat industrial paint systems including zinc silicate primers, epoxy barrier layers, and polyurethane topcoats. For marine or highly humid environments, hot-dip galvanizing per ASTM A123 / ISO 1461 is readily supplied.
How are fabricated structural components packaged for ocean freight shipping?
Members are tagged with stamped steel labels corresponding to the 3D erection drawings. Components are bundled using heavy-duty steel strapping, timber dunnage, and rust-protective covers. Small accessories, base plates, and hardware are crated in seaworthy wooden pallets to ensure damage-free unloading and rapid site organization.
Request Detailed Engineering Specifications & Project Catalog
Partner with an established manufacturer trusted across 352+ industrial installations. Contact our structural engineers to review your building drawings or explore technical capabilities.