Leading Structural Steel Package Integrator
Located in Liaocheng City, Shandong Province, China, Shandong Baimaoxing Iron and Steel Co., Ltd. is a premier comprehensive steel enterprise integrating R&D, precision processing, sales, and professional technical services.
Our diversified product portfolio covers carbon steel products (steel pipes, plates, round bars, coils, angle bars, flat bars, I-beams, galvanized steel coils, PPGI), stainless steel series (plates, coils, pipes) and non-ferrous metals (copper, aluminum, titanium plates, bars, tubes, coils).
Adopting a science-driven management system and strict quality control standards, our products are widely trusted and applied in key industries including aerospace, military equipment, petrochemicals, automotive parts, shipbuilding, precision machining, transportation & rail, engineering machinery, electrical equipment and packaging machinery. We are committed to delivering reliable metal material solutions as a trusted strategic partner for global clients.
1. Heavy Duty Carbon Steel Plates (Q235B / Q355B)
Custom-cut connection plates, base plates, stiffeners, and crane girder webs for rigid structural stability.
Engineered Plate Thickness Guides by Structural Span & Crane Tonnage
Different building spans and overhead crane capacities demand precise plate thicknesses to ensure structural integrity and prevent fatigue failure. Below is our engineering recommendation table for Q235B / Q355B plates:
| Span (m) | Crane Tonnage (t) | Base Plate (mm) | Node Connection Plate (mm) | Crane Girder Web/Flange (mm) |
|---|---|---|---|---|
| 15 - 18m | No Crane / 3t - 5t | 16 - 20 mm | 10 - 12 mm | 8 / 12 mm |
| 20 - 24m | 5t - 10t | 22 - 28 mm | 14 - 16 mm | 10 / 16 mm |
| 24 - 30m | 10t - 20t | 30 - 36 mm | 18 - 22 mm | 12 / 20 mm |
| 30m+ | 20t+ (Heavy Industrial) | 40 - 50 mm | 24 - 30 mm | 16 / 25+ mm |
Hot-Rolled Coil-Cut Plates (开平板) vs. Mill Plates (原平板)
Understanding plate manufacturing processes helps optimize cost and performance:
- Hot-Rolled Coil-Cut Plates (开平板): Decoiled and flattened from steel coils. Features higher cost-efficiency and faster delivery. Ideal for secondary structures, minor connection plates, and stiffeners. Thickness typically ranges up to 16mm.
- Mill Plates (原平板): Directly cast and rolled as single thick plates. Offers superior flatness, minimal internal stress, and higher thickness consistency. Mandatory for heavy load-bearing applications like primary column base plates and crane runways.
Original Carbon Steel Plate Specifications
| Carbon Steel Sheet/Plate Technical Data | ||
|
Material Grades | Q235B/Q355B/C/D/E/Q245R/Q345R/NM360/NM400/NM450/NM500/65MN/MN13Q235NHB/Q355NHB/Q355GNHB/Q355GNHD/Q295NHB, A32, D32, E32, F32; A36, D36, E36, F36; A40, D40, E40, F40, AH32, DH32, EH32; AH36, DH36, EH36; AH40, DH40, EH40, 2HGr50 |
| Thickness Range | 1mm ~ 300mm | |
| Width Range | 20mm ~ 3000mm | |
|
Length | Customer required (1m - 12m) |
| Zinc Coating (Galv.) | 30g - 275g/m² | |
| Tolerance | Thickness: ±0.1mm, Width: ±5mm, Length: ±5mm | |
|
Surface Finish | Black (As Rolled), Oiled, Shot-blasted & Primed |
| Technique | Hot Rolled / Cold Rolled | |
| MOQ | 1 Ton | |
|
Price & Terms | FOB, FCA, CIF, CFR, DDU, EXW. T/T, L/C, Western Union |
| Delivery Time | Within 15 days after deposit validation | |
| Applications | Steel structures, bridge girders, concrete pouring formwork, heavy shipbuilding | |
2. Structural Steel Sections & Profiles
Precision-engineered H-Beams, I-Beams, Channels, Angles, and Purlins for complete structural frames.
Structural Selection Guide
A building's frame relies on different profiles to support specific loads:
- H-Beams (HW/HM/HN): HW (Wide Flange) for heavy vertical columns; HM (Middle Flange) for columns/beams; HN (Narrow Flange) for primary horizontal floor beams.
- I-Beams: Mainly used as crane runway beams due to their high section modulus along the primary axis.
- Angle Steel (Equal/Unequal): Used as vertical and horizontal bracing systems to resist wind and seismic loads.
- Channel Steel (C-Channel): Ideal for structural wall girts, door headers, and window framing.
- C/Z Purlins: Cold-formed galvanized steel members supporting roof panels and wall cladding.
Cost Comparison: Hot-Rolled vs. Welded H-Beams
| Parameters | Hot-Rolled H-Beams | Welded H-Beams (Built-up) |
|---|---|---|
| Production Method | Continuous hot rolling mill | Three-plate automated welding line |
| Dimensional Flexibility | Standard sizes only (GB/JIS/ASTM) | Fully customizable dimensions & ratios |
| Cost per Ton | Lower (Mass production) | 10% - 15% higher (Processing labor) |
| Structural Weight | Heavier due to fixed sizes | Optimized design reduces overall weight |
| Internal Stress | Low and uniform | Requires heat relief or straightening |
Original Carbon Steel Bar/Rod Specifications
| Carbon Steel Bar/Rod technical Specifications | ||
|
Product Name | AISI 4140 Flat Angle 1060 C45 CK45 1095 1020 A36 Q235 SAE 1016 1084 Low Round Carbon 1045 1050 1055 Steel Bar |
| Standards | ASTM A106, ASTM A53, API 5L Gr.B, DIN17175, DIN1629 | |
|
Outer Diameter | 20mm - 610mm |
| Wall Thickness | 4mm - 70mm | |
|
Diameter Tolerance | OD: ±1%, WT: ±10% (Strict standard compliance) |
| Materials | 10#, 20#, 45#, 16Mn, A106(B,C), A53(A,B), API J55, API K55, Q235, Q345, ST35.8, ST37, ST42, ST45, ST52 | |
|
Inspection Certs | ISO, BV, SGS, MTC (Mill Test Certificate) |
| Packaging | Waterproof paper and steel strip bundling, export seaworthy packaging | |
|
Supply Capacity | 1000 Metric Tons / Month |
| MOQ | 5 Metric Tons (Sample orders accepted) | |
Original Carbon Steel Coil Specifications
| Carbon Steel Coil technical Specifications | ||
|
Type | Hot Rolled Steel Coil / HRC SS400 Q235 ST37 / Hot Rolled Steel Plate |
| EN10025 Grade | S235JR, S235J0, S235J2 | |
| DIN 17100/17102 | St33, St37-2, Ust37-2, RSt37-2, St37-3, StE255, WstE255, TstE255, EstE255 | |
|
ASTM Standards | A36/A36M, A283 Grade A/B/C/D, A573 Grade 58/65/70 |
| Chinese Standards | GB/T700: Q235A, Q235B, Q235C, Q235D, Q235E | |
|
JIS G3106 | SS330, SS400, SS490, SS540, SM400A, SM400B, SM400C |
| Thickness | 1.5mm - 280mm (Common: 6mm, 8mm, 12mm, 16mm, 20mm, 25mm, 30mm, 50mm, 80mm+) | |
| Width & Length | Width: 1000mm to 3000mm; Length: 2000mm to 6000mm or customized coils | |
|
Quality Testing | Hydraulic Testing, Eddy Current testing, Infrared Defect Detection |
| Surface Finish | Bared, Black Painted (Varnish), Galvanized, Oiled | |
|
Applications | High pressure containers, boilers, bridges, structural frames, shipbuilding |
| Coil Storage | Dry, moisture-controlled warehouses with heavy-duty overhead crane loading | |
Original Carbon Steel Pipe Specifications
| Carbon Steel Pipe technical Specifications | ||
|
Material Grades | 20#, 45#, Q355B/C/D/E, 27SiMn, 20Cr, 40Cr, 15CrMo, 15CrMoG, 20CrMo, 35CrMo, 42CrMo, P91, P92, 12Cr1MoV, 12Cr1MoVG, A106 Gr.B, A333 Gr.6, Q195, Q235, ASTM A500, A53, A36, S235JR, S275JR, S355JR, C250LO, C350LO |
| Thickness | 1mm ~ 100mm | |
| Width (Diameter) | 10mm ~ 3200mm | |
|
Length | Customer required (1m - 12m) |
| Tolerance | Thickness: ±0.1mm, Width: ±5mm, Length: ±5mm | |
| Surface | Black (Self-finish), Galvanized (White), Varnished | |
|
Techniques | Hot Rolled / Cold Drawn / Welded ERW |
| MOQ & Terms | 1 Ton. FOB, CIF, CFR, DDU, EXW. T/T or L/C | |
|
Delivery & Package | Within 15 days. Standard seaworthy export packaging |
| Key Advantages | High dimensional accuracy, robust pressure resistance, extensive ready stock | |
3. Color Coated (PPGI/PPGL) & Galvanized Coils
High-durability roofing and wall cladding systems designed for severe weather resistance.
PPGI vs. PPGL: Selecting the Right Substrate
The core substrate determines the service life of your building envelope:
- PPGI (Prepainted Galvanized): Substrate is hot-dip galvanized steel (GI). Provides sacrificial protection to cut edges. Best suited for standard environments and alkaline surroundings (e.g., agricultural buildings).
- PPGL (Prepainted Galvalume): Substrate is 55% Aluminum-Zinc alloy coated steel (GL). Aluminum provides barrier protection, while zinc offers sacrificial protection. Corrosion resistance is 3 to 6 times higher than PPGI in typical industrial environments.
Coating Paint System Selection Guide
We match the coating type to the environmental UV exposure and chemical corrosion levels:
| Coating Type | Chemical Formula | UV Resistance | Corrosion Resistance | Warranty (Years) |
|---|---|---|---|---|
| PE (Polyester) | Standard Polyester | Moderate | Standard | 7 - 10 Years |
| SMP (Silicon Modified) | Silicone + Polyester | Good | High | 10 - 15 Years |
| HDP (High Durability) | High-stability Monomer | Excellent | Very High | 15 - 20 Years |
| PVDF (Fluorocarbon) | 70% Kynar 500 Resin | Outstanding | Maximum (Acid/Salt) | 20 - 25+ Years |
Popular Color & Thickness Configurations
For industrial structures, standard roof and wall specifications are optimized for structural load-bearing and aesthetics:
- Thickness Options: 0.4mm to 0.6mm for standard wall panels; 0.5mm to 0.8mm for high-span roof panels.
-
Popular Colors (RAL Standard):
■ RAL 5015 Sky Blue (Industrial Standard)
■ RAL 7016 Anthracite Grey (Modern Office/Commercial)
■ RAL 9002 Grey White (Interior Ceiling/Wall Lining)
■ RAL 6005 Moss Green (Eco-friendly Landscaping Integration)
Original Colored Coated Corrugated Board Specifications
| Corrugated Board technical Specifications | ||
|
Material Grades | SGCC, SGCH, G550, DX51D, DX52D, DX53D, Q195, Q235 |
| Thickness | 0.12mm - 0.6mm (Custom heavy profiles up to 1.2mm) | |
| Zinc Coating Weight | 40g - 275g/m² | |
|
Width Options | 762mm (650mm coverage), 914mm (780mm coverage), 1000mm (900mm coverage) |
| Length Range | 1.8m - 12m or customized project length | |
| Surface Treatments | Galvanized, PVC Coated, Anti-rust Oiled, Protective Film Laminated | |
|
Applications | Industrial roofing, wall paneling, modular housing, container siding |
| Trade & Loading Ports | EXW, FOB, CIF, CFR. Shanghai, Tianjin, Qingdao Ports | |
| Payment Terms | T/T (30% deposit + 70% against B/L copy) or 100% L/C at sight | |
Original Colored Coated Roll / Coil Specifications
| Color Coated Coil technical Specifications | ||
|
Standards & Grades | AISI, ASTM, BS, DIN, GB, JIS. DX51D, SGCC, G550, SPGC |
| Processing Services | Bending, Welding, Decoiling, Laser Cutting, Punching | |
| Width & Length | 600mm - 1250mm standard width. Length fully customized | |
|
Surface Finish | Matt, Glossy, Textured, Wood Grain, Embossed patterns |
| Zinc Coating (GI) | 30g - 275g/m² | |
| Color Options | RAL Classic color matching or custom physical client samples | |
Original Galvanization Steel Roll / Coil Specifications
| Galvanized Steel Coil Technical Data | ||
|
Material Grades | Q195, Q235, SGCC, SGCH, SGC340/400/440/490/570, SGHC, SGH340/400/440/490/540, DX51D, DX52D, DX53D, DX54D, S220GD, S250GD, S280GD, S320GD, S350GD, S400GD, S500GD, S550GD |
| Thickness & Width | Thickness: 0.12mm ~ 10mm. Width: 100mm ~ 2000mm | |
| Zinc Layer Weight | 40g/m² - 275g/m² | |
|
Spangle Types | Regular spangle, minimal spangle, zero spangle, big bright spangle |
| Technique | Cold Rolled / Hot Dip Galvanizing | |
| MOQ & Lead Time | 1 Ton. Fast delivery within 15 days upon deposit | |
4. Steel Package Accessories & Building Material Ratios
Ensure structural integrity with matched anchor bolts, high-strength bolts, fasteners, and flashing.
Fastener & Accessory Match List
A structural frame is only as strong as its connections. We provide complete matching accessories:
- Foundation Anchor Bolts: Q235B / Q345B threaded rods (M24, M27, M30, M36) with heavy nuts and washers to anchor steel columns to concrete footings.
- High-Strength Structural Bolts: Grade 10.9S and 8.8S Torshear type bolts (M16, M20, M22, M24) for primary beam-to-column node connections.
- Self-Drilling Screws: Hex washer head screws with EPDM washers, coated for C4/C5 atmospheric corrosion resistance, to secure cladding.
- Flashing & Trims: Color-matched 0.5mm PPGI/PPGL ridge caps, eave trims, gable flashings, and corner covers.
Cost Analysis: Package Supply vs. Sourced Separately
| Cost Factor | Baimaoxing Package Supply | Sourced Separately |
|---|---|---|
| Material Cost | Volume discount (5% - 8% lower) | Retail pricing from multiple vendors |
| Logistics Fee | Consolidated shipping (One container/flatbed) | Multiple shipping charges from different regions |
| On-site Fitting | 100% matched pre-designed tolerances | Risk of mismatched sizes and thread pitches |
| Quality Control | Single MTC/QA report for structural package | Difficult to trace responsibility for component failures |
Standard Steel Structure Building Material Ratios
Based on our global project database, the approximate steel and accessory weight distribution ratios per building size are outlined below:
| Building Scale | Primary Frame (H-Beams/Columns) | Secondary Frame (Purlins/Girts) | Enclosure (Roof/Wall Panels) | Bracing & Connection Plates | Connection Accessories (Bolts/Screws) |
|---|---|---|---|---|---|
| Small Plant (1,000 m²) | ~ 55% (35 - 40 kg/m²) | ~ 20% (12 - 15 kg/m²) | ~ 12% (0.5mm PPGI) | ~ 8% (Q235B Plates) | ~ 5% (M20/M24 Bolts) |
| Medium Plant (5,000 m²) | ~ 60% (45 - 50 kg/m²) | ~ 18% (10 - 12 kg/m²) | ~ 11% (0.5/0.6mm PPGL) | ~ 7% (Q355B Plates) | ~ 4% (Grade 10.9S Bolts) |
| Large Plant (10,000 m²+) | ~ 65% (55 - 65 kg/m²) | ~ 15% (8 - 10 kg/m²) | ~ 10% (0.6mm PVDF PPGL) | ~ 6% (Thick Mill Plates) | ~ 4% (Systemized Fasteners) |
5. Advanced Steel Processing & Fabrication Services
From raw metal to ready-to-erect structural components, we process it all under one roof.
Precision Cutting & Beveling
Equipped with high-precision CNC laser cutting, plasma cutting, and heavy oxy-fuel cutting machines, we process carbon steel plates up to 300mm thickness. Beveling services prepare joints for immediate welding.
CNC Punching & Drilling
Automated multi-spindle drilling lines ensure bolt holes on base plates, connection flanges, and gusset plates align perfectly with structural columns and beams, reducing assembly time.
Welding & Surface Coating
Our certified welders perform submerged arc welding (SAW) and gas metal arc welding (GMAW) for structural beams. Surface treatments include shot blasting (Sa2.5 standard), rust-preventative priming, and hot-dip galvanizing.
6. Real-World Engineering Projects & Production Capability
Witness how Baimaoxing Steel delivers reliability and efficiency to industrial projects worldwide.
Heavy Industrial Machinery Assembly Workshop (Southeast Asia)
Project Overview: A 12,000 m² double-span industrial workshop featuring 20-ton overhead cranes.
Supplied Materials: Welded Q355B H-beams for columns, HN-beams for crane runway girders, 30mm thick mill plate base plates, 0.6mm HDP coated PPGL corrugated sheets (RAL 5015 Sky Blue) for roofing, and Grade 10.9S high-strength bolts.
Value Delivered: Pre-drilled bolt holes and pre-cut plates reduced structural erection time by 18 days. The HDP coating offers long-term resistance to high humidity and temperatures.
Coastal Chemical Logistics Warehouse (Middle East)
Project Overview: An 8,500 m² logistics warehouse located within 5km of a coastline.
Supplied Materials: Hot-dip galvanized structural H-beams and C/Z purlins (zinc coating weight 275g/m²), 0.6mm PVDF coated PPGL roofing sheets (RAL 9002), and stainless steel self-drilling fasteners.
Value Delivered: The combination of high-density hot-dip galvanizing and a PVDF coating protects the warehouse from salt spray corrosion and intense UV radiation, extending the maintenance cycle.
Production Line & Packaging Standards
Automated steel processing lines ensure dimensional accuracy.
Moisture-proof paper and steel strapping protect materials during transit.
Pre-sorted components delivered directly to the construction site.
Frequently Asked Questions
Everything you need to know about our structural steel packages.
International Certifications
Complying with global quality and safety standards.
Our manufacturing facilities are ISO 9001, CE, and SGS certified, ensuring compliance with ASTM, GB, EN, and JIS standards.
Get a Customized Quote for Your Project
Ready to source your structural steel package? Send us your project drawings, material lists, or specifications, and our engineering team will provide a detailed quote.
Shandong Baimaoxing Iron and Steel Co., Ltd. offers consolidated shipping, precise processing, and reliable quality control for projects worldwide.
Direct Contact Details:
Wendy (Sales Manager)
Phone / WhatsApp / WeChat: +86-15216350333
Email: baimaoxingsteel@gmail.com
Please include your required steel grades, thickness, and drawing files (if available).