Prefabricated Building Materials & PEB Accessories

ASTM / EN Standard

All coils, profiles, and hardware conform strictly to ASTM, BS, and European manufacturing benchmarks.

Mill Test Certified

Full MTC (EN 10204 3.1) traceability covering chemical composition, yield strength, and coating mass.

Seaworthy Packing

Export-grade moisture barrier wrapping, heavy strapping, corner protections, and container stowage plans.

Rapid Turnaround

Integrated roll-forming lines delivering custom cut-to-length profiles and full accessory packages on schedule.

Comprehensive Inventory

Supplied Building Materials & Structural Components

Manufactured and sourced under ISO 9001 certified protocols, serving general contractors, PEB fabricators, cold chain builders, and commercial infrastructure projects globally.

Cladding & Roofing

Corrugated Profile Sheet

High-tensile profiled metal cladding engineered with deep anti-capillary ribs, offering superior weather tightness, structural rigidity, and UV degradation resistance.

Material Grade:ASTM A792 / Galvalume / PPGI
Thickness:0.35 mm – 0.80 mm
Effective Width:840 mm / 900 mm / 1000 mm
Coating:AZ150 / Zinc Z180

Composite floor deck sheet for multi-story steel structures

Floor Decking

Composite Deck Sheet

Embossed trapezoidal floor deck profile functioning as permanent formwork and composite tensile reinforcement in reinforced concrete floor slabs.

Steel Grade:S350GD+Z / ASTM A653
Profile Height:51 mm / 75 mm / 76 mm
Thickness:0.80 mm – 1.60 mm
Zinc Coating:Z120 – Z275 g/m²

EPS sandwich panel for roof and wall thermal insulation

Insulated Panel

EPS Sandwich Panel (Roof & Wall)

Lightweight thermal insulation panel featuring self-extinguishing expanded polystyrene core continuously laminated between prepainted steel facings.

Core Density:12 – 20 kg/m³
Panel Thickness:50 mm / 75 mm / 100 mm / 150 mm
Joint System:Tongue-and-groove / Z-lock
Thermal Conductivity:λ ≤ 0.038 W/m·K

Insulated Roof

EPS Sandwich Roof Panel

Three-crest and four-crest corrugated roof panels designed for industrial sheds, warehouses, and clean production spaces requiring accelerated water drainage.

Outer Skin:3-Rib / 4-Rib Corrugated PPGI
Core Thickness:50 mm – 150 mm
Standard Width:950 mm / 960 mm
Fire Rating:B1 Flame Retardant

Heavy duty industrial exhaust blower fan

Ventilation

Exhaust Blower Fan Industrial

High-volume, low-noise axial industrial wall exhaust blowers fitted with automatic shutters and corrosion-resistant galvanized iron housing for plant climate control.

Airflow Capacity:12,000 – 44,000 m³/h
Blade Material:Stainless Steel / Aluminum Alloy
Motor Protection:IP55, Class F Insulation
Voltage:380V / 415V, 50/60 Hz

Structural steel fasteners and self drilling screws

Fastening Systems

Structural Fasteners & Screws

Case-hardened self-drilling carbon steel and bi-metal screws assembled with bonded EPDM washers, providing leak-proof fastening on purlins and sheeting.

Drill Capacity:Up to 12.5 mm steel flange
Coating:Ruspert / Class 3 & 4 Corrosion Spec
Head Types:Hex Flange Washer Head
Standards:DIN 7504K / AS 3566

Raw Material

Galvanized Steel Coil (GI)

Continuous hot-dip zinc coated steel coils with uniform spangle structure, suited for cold roll forming into purlins, deck profiles, and ducting.

Grade:DX51D+Z / SGCC / CS Type B
Zinc Coating:Z80 – Z275 g/m²
Thickness:0.30 mm – 3.0 mm
Coil ID:508 mm / 610 mm

Engineered industrial louver wall system

Airflow Management

Industrial Ventilation Louvers

Aerodynamically contoured blade louvers fabricated from PPGI or extruded aluminum to ensure maximum natural cross-ventilation while providing continuous weather-barrier defense.

Blade Angle:30° / 45° Fixed Pitch
Material:Pre-painted Galvanized Steel / Al-alloy
Frame Gauge:1.0 mm – 1.5 mm
Screen:Stainless Steel Bird / Insect Mesh

Hot rolled mild steel coil for structural fabrication

Raw Material

Mild Steel Coil (HR / CR)

Premium structural quality hot-rolled and cold-rolled mild steel coils utilized for built-up H-beams, web plates, structural tubes, and framing brackets.

Grade:Q235B / Q355B / ASTM A36
Thickness:1.5 mm – 16.0 mm
Width:900 mm – 1500 mm
Edge:Mill Edge / Slit Edge

Heavy structural mild steel plates and sections

Structural Steel

Structural Mild Steel Plates & Shapes

High-strength hot-rolled structural steel plates, angles, channels, and flat bars custom cut and drilled for portal frame connections and beam baseplates.

Standards:ASTM A36 / BS EN 10025 S275, S355
Plate Thickness:6.0 mm – 60.0 mm
Processing:CNC Oxy-Fuel / Plasma Cutting
Finish:Shot Blasted SA 2.5 + Primer

High tensile nut and bolt fasteners for steel structures

Hardware

High-Tensile Nut & Bolt Sets

Heavy-hex structural bolts, matching nuts, and hardened flat washers manufactured to high-tensile standards for primary moment frame connections.

Grades:ASTM A325, A490 / ISO 8.8, 10.9
Thread Size:M12 – M36 / 1/2" – 1-1/2"
Surface:Hot-Dip Galvanized / Black Phosphate
Configuration:Heavy Hex Bolt + Nut + 2 Washers

Ventilation

Power Roof Ventilator

Electrically driven dome roof exhaust fans engineered to expel severe process heat, chemical fumes, and airborne dust from steel factory buildings.

Air Delivery:5,000 – 35,000 m³/h
Fan Diameter:500 mm – 1200 mm
Cowl Material:FRP / Zinc-Aluminum Alloy
Drive:Direct Drive / Belt Drive

Pre painted galvanized steel coil for corrugated sheets

Coil Stock

PPGI Pre-Painted Steel Coil

Color-coated steel coil with zinc protective substrate and durable polyester (PE/PVDF) paint finish, ensuring 20+ years UV protection and color retention.

Substrate:Hot Dip GI (Zinc 60-180g/m²)
Top Coat:20-25 µm PE / HDP / PVDF
Back Coat:5-7 µm Epoxy Primer
Colors:Standard RAL Palette / Custom Matched

Secondary Framing

Cold-Formed C & Z Purlins

Precision roll-formed galvanized roof and wall purlins with pre-punched web and flange holes for rapid bolted assembly and seamless overlap nesting.

Material Yield:High Strength 345 – 450 MPa
Section Depths:100 mm – 350 mm
Thickness:1.5 mm – 3.2 mm
Punching:Standard Cleat & Lap Hole Patterns

Rock wool fire resistant roof sandwich panel

Fireproof Panel

Rock Wool Roof Sandwich Panel

Non-combustible stone wool core sandwich panel offering up to 4-hour fire rating, superior sound attenuation, and thermal boundary compliance.

Core Density:100 – 140 kg/m³
Combustibility:Class A1 Non-combustible
Fire Endurance:60 – 240 mins (BS 476 Part 22)
Thickness:50 mm / 75 mm / 100 mm / 150 mm

Flashings & Trims

Sandwich Panel Installation Accessories

Comprehensive accessories including ridge caps, drip trims, eave gutters, inner/outer corner flashing, PVC cleanroom trims, and butyl sealing tapes.

Fabrication:Bespoke CNC Press Brake Bending
Material:Matched PPGI / Aluminum Sheet
Girths:150 mm – 1200 mm custom profiles
Sealants:EPDM Profile Foam, Butyl Mastik

Polyurethane PU PIR insulated roof panel

Thermal Efficiency

PU / PIR Roof Sandwich Panel

Rigid Polyurethane or Polyisocyanurate high-density foam core panels engineered for cold chain facilities, cold rooms, and ultra-low energy commercial roofs.

Core Density:40 ± 2 kg/m³
Thermal Value:λ = 0.022 W/m·K
Core Formulation:CFC-Free Rigid PU / PIR
Closed Cell:> 95% Water Impermeable

Composite floor deck shear studs and weld bolts

Composite Hardware

Shear Studs & Decking Connectors

Heavy shear connector studs arc-welded through floor deck panels to the top flange of steel beams, resisting horizontal shear forces in composite structures.

Material:Low Carbon Steel ASTM A108 (1015-1020)
Tensile Strength:≥ 450 MPa
Diameters:13 mm / 16 mm / 19 mm / 22 mm
Accessories:Supplied with Ceramic Ferrules

Motorized industrial rolling shutter door

Access Solution

Industrial Roller Shutter Door

Heavy-duty motorized rolling doors fabricated with interlocking galvanized slats, robust guide tracks, and safety brakes for factory loading bays.

Slat Material:0.8 mm – 1.2 mm Galvanized Steel
Operation:Electric Motor + Manual Chain Fallback
Wind Load:Engineered up to Class 3 Wind Resistance
Span:Custom built up to 12m width × 8m height

Access Solution

Industrial Steel Sliding Door

Top-hung insulated sliding doors utilizing sealed steel-ball-bearing roller trolleys and cold-room quality rubber perimeter gaskets for easy glide operation.

Panel Infill:EPS or PU High-Density Core
Track System:Heavy Galvanized Enclosed Box Track
Configuration:Single Leaf / Bi-Parting
Hardware:Industrial Flush Pulls & Floor Stops

Prefabricated industrial steel stairs and walkways

Access Structure

Prefabricated Steel Staircase

Modular structural steel emergency exits, maintenance staircases, and mezzanine access flights with non-slip perforated or chequered tread plates.

Stringers:Heavy PFC Channels / Hollow Sections
Treads:Anti-slip Chequered Plate / Serrated Grating
Safety Handrails:Compliant 1100 mm Twin Handrail + Kickplate
Corrosion Finish:Hot Dip Galvanized / Epoxy Polyurethane

Stainless steel natural wind driven turbo ventilator

Zero-Energy Eco

Natural Turbo Ventilator

Wind-driven, zero-electricity rotary roof ventilators that exhaust trapped hot air through centrifugal suction, creating continuous chimney draft.

Vane Material:Stainless Steel 201/304 or Marine Aluminum
Neck Diameter:500 mm / 600 mm (20" / 24")
Bearings:Dual Permanently Lubricated UBC Bearings
Base Plate:Matched to Corrugated Roof Profile

High strength foundation anchor bolts L and J shape

Civil Anchoring

High-Strength Anchor Bolts

Precision-threaded L-type, J-type, and welded plate foundation anchor bolts for anchoring heavy structural columns into reinforced concrete footings.

Material Grades:ASTM F1554 Gr. 36, 55, 105 / 8.8
Diameters:M16 to M64 (5/8" to 2-1/2")
Lengths:300 mm to 2000 mm custom forged
Corrosion Defense:Electro-Galv / Full Length HDG

Polyurethane insulated cold storage and cleanroom door

Cold Chain

Insulated Polyurethane (PU) Door

High-integrity hermetic doors engineered for cleanrooms, cold storage, meat processing, and pharmaceutical chambers with built-in thermal breaks.

Blade Core:High Density Injected PU (45 kg/m³)
Door Skin:Stainless Steel 304 / Antimicrobial PPGI
Features:Low-Temp Heating Wire, EPDM Gasket
Thickness:75 mm / 100 mm / 120 mm

Radiant Barrier

Double Bubble Radiant Insulation

Composite thermal barrier comprising twin layers of polyethylene air bubbles encapsulated between pure reflective aluminum foil layers, blocking up to 97% of radiant heat.

Structure:Pure Alu Foil + Double PE Bubble + Alu Foil
Reflectivity:96% – 97% Radiant Heat Block
Thickness:7 mm – 8 mm
Roll Size:1.2 m Width × 40 m Length

Quality & Standards

International Procurement & Technical Specifications

Joint Star Steel Structure Ltd. follows rigorous testing regimes guaranteeing dimensional consistency, zinc mass adhesion, and structural load tolerances.

Engineering Material Supply Standards Matrix
Product Category	Applicable International Standard	Available Material Grades	Anti-Corrosion / Surface Specs
Roof & Wall Profile Sheets	ASTM A792 / ASTM A653 / BS EN 10346	CS Type B, FS Type B, Grade 50 / 80	Galvalume AZ150, HDG Z180-Z275, PVDF/PE Paint
Composite Floor Deck Sheets	ASTM A653 / BS EN 10346 / S350GD+Z	High Tensile 350 MPa – 550 MPa	Zinc Z180 – Z275 g/m² Triple Spot Test
Insulated Sandwich Panels	EN 14509:2013 / ASTM C578 / ASTM C612	EPS (16kg/m³), PU (40kg/m³), Rock Wool (120kg/m³)	0.40 - 0.60 mm Color Coated Aluzinc Facings
C & Z Structural Purlins	ASTM A653M / AS 1397 / EN 10346	G350, G450, G550 High-Yield Steel	Hot-Dip Galvanized Z200 – Z275 g/m²
Anchor Bolts & Connection Fasteners	ASTM F1554 / ASTM A325 / ISO 898-1	Grade 36, 55, 105 / Class 8.8, 10.9	Hot-Dip Galvanized (ASTM A153) / Ruspert Finish
Industrial Roof Ventilation	ISO 5801 / AMCA Standard 210	SS 304, Marine Grade Al-Alloy, FRP Casing	Acid-Resistant & Anti-Corrosion Treatment

Export Compliance

Quality Verification & Container Logistics

Every overseas shipment is engineered for damage-free transit and rapid crane discharge on job sites.

Mill Traceability & QA

Certified lab testing of incoming hot-dip coils, tensile pull-out tests on self-drilling screws, and density verification on all polyurethane & mineral wool cores before fabrication.

Export Sea-Packing

High-density plastic shrink film, steel strapping with heavy corner guards, timber palletized cradles, and moisture-absorbing desiccant sacks placed inside every 20ft / 40ft HQ container.

Component Tagging & Documentation

Weatherproof barcoded piece-marks, explicit packing lists, assembly drawings, and customs commercial dossiers formatted for rapid clearance at destination seaports.

Order Prefabricated Building Materials Direct From The Factory

Send your bill of quantities (BOQ), architectural drawings, or technical specifications. Our engineering estimating team prepares formal FOB / CIF quotes within 24 business hours.

Send an Inquiry

Procurement Knowledge

Frequently Asked Questions

Clear facts for industrial developers, procurement heads, and EPC project managers.

What international standards govern Joint Star Steel building materials?

All raw materials and roll-formed building components comply with international engineering standards such as ASTM A653 / ASTM A792 for galvanized and galvalume steel, ASTM A325 for structural bolts, EN 14509 for factory-made insulated sandwich panels, and relevant ISO quality management protocols.

Can steel coils, sheets, and purlins be customized to project dimensions?

Yes. We supply corrugated profile sheets, decking panels, C/Z purlins, and flashings cut to precise shop-drawing lengths up to 12 meters, customized gauge thicknesses (0.35mm to 3.0mm), and specific punching patterns to minimize on-site cutting and labor.

How are prefabricated building materials packaged for export container shipment?

Materials are packaged according to strict overseas marine transit standards: steel coils are eye-to-sky strapped on heavy pallets with waterproof plastic wraps; profile sheets and sandwich panels are bundled with protective films and edge guards; fasteners and hardware are packed in reinforced, moisture-sealed drums or wooden cases.

What Mill Test Certificates (MTC) and quality documentation are provided?

Each export shipment includes complete Mill Test Certificates (EN 10204 Type 3.1) showing chemical composition, yield strength, tensile strength, zinc coating mass (g/m²), and core density tests for insulation panels.

Prefabricated Building Materials & Accessories