Industrial Building Steel Structure and Building Envelope System Product Introduction
01 Steel Structure System
Steel Structure System for Industrial Buildings
1、Composition of Industrial Steel Structure Building Systems
2、Types of Steel Structure Buildings
3、Components of Portal Frames in Industrial Buildings
4、Detailed Structural Analysis of Industrial Buildings
5、Characteristics of Steel Structures
Composition of Industrial Steel Structure Building System
Types of Steel Structure Buildings
Component Composition of Industrial Building Portal Rigid Frames
Detailed Explanation of Overall Industrial Building Structure
Portal Rigid Frame Structure Forms
Structural Requirements for Portal Rigid Frames
1.Span: Distance between steel column axes; 18~36m for single-span, not exceeding 48m.
2.Column Spacing: Distance between adjacent rigid frames; 6~9m, not exceeding 12m.
3.Eaves Height: Height of the top of side steel columns; 4.5~9m, not exceeding 15m.
4.Roof Slope: Inclination angle for drainage; 5%~20%.
5.Crane Capacity: For portal rigid frames, crane lifting capacity should not exceed 20 tons (medium-duty service).
Engineering Photos
Characteristics of Steel Structures
Advantages
1.Light Total Building Weight: Approximately half the weight of concrete buildings, reducing the cost of foundation engineering.
2.Good Plasticity and Toughness, Excellent Seismic Performance: Steel’s plasticity prevents sudden fracture due to overloading; its ductility enhances adaptability to dynamic loads. Post-earthquake investigations (Tangshan and Wenchuan) show minimal damage to all-steel structures even in high-intensity earthquake zones.
3.Strong Architectural Flexibility: Meets requirements for large spans and high clear heights; truss or grid structures enable aesthetic and comfortable designs.
4.Fast Construction Speed: All steel components are prefabricated in factories, with on-site bolting or welding and modular construction, shortening the construction period by over 1/4.
5.Good Environmental Performance: Steel is recyclable, reducing construction waste.
Disadvantages
1.Poor Fire Resistance: The stress of carbon structural steel decreases rapidly when the temperature exceeds 300-350℃, leading to safety accidents.
2.Poor Corrosion Resistance: Steel rusts when exposed to air, water, and oxygen, reducing its service life.
3.Slightly Higher Material Cost: The per-square-meter cost of steel is 10%~20% higher than that of concrete structures, but labor and time costs need to be considered comprehensively.
4.Building Energy Efficiency Issues: Steel is a good thermal conductor (thermal conductivity: ~40~50W/(m·K)) with lower airtightness than concrete buildings, requiring extra attention to thermal insulation for residential buildings.
5.Limited Application Scope: Suitable for single-story industrial buildings, multi-story frames, and some super high-rises; not cost-effective for low-to-medium high-rises.
02 Color Coated Steel Sheet
Introduction to Color-Coated Steel Sheets
1、Definition of Color-Coated Steel Sheets
2、Structure of Color-Coated Steel Sheets
3、Classification of Color Coatings
4、Selection of Color Steel Sheet Suppliers
Color-coated steel sheet
Color-coated steel sheet (also known as color plate) uses cold-rolled steel plate (surface-coated with an anti-corrosive layer) as the substrate. After surface pre-treatment (including degreasing and chemical conversion), one or more layers of differently colored organic coatings are applied via roller coating. The sheet is then formed by baking and cooling.
Structure of color-coated steel sheet
1、Substrate: Color-coated steel sheet substrates typically have a thickness range of 0.4mm to 0.8mm, with a yield strength of 220MPa to 550MPa.
2、Coatings: Common types include hot-dip aluminum-zinc alloy coated, hot-dip galvanized, and hot-dip zinc-aluminum-magnesium alloy coated. Hot-dip galvanized: Denoted by the letter "Z", with a typical range of 60–275 g/m² (both sides). Hot-dip aluminum-zinc: Denoted by the letter "AZ", with a typical coating weight range of 80–180 g/m² (both sides). The alloy composition comprises 55% aluminum, 43.5% zinc, and 1.6% silicon. Hot-dip zinc-aluminum-magnesium:Denoted by the letter "ZM", with a typical coating weight range of 70–180 g/m² (both sides). The alloy composition comprises zinc supplemented with 11% aluminum, 3% magnesium, and trace amounts of silicon.
3、Coating process: After chemical pre-treatment, paint is applied in two coating stages. The film thickness requirement is ≥20μm on the front side and ≥5μm on the back side. The process is categorized into: Two-coat one-bake (2/1), Two-coat two-bake (2/2). In metal sandwich panels, the 2/1 process is commonly used as the primary material.
Classification of color coatings
1、PE (Polyester): Offers excellent adhesion properties and ease of processing, with relatively low cost. It provides wide options for colors and gloss levels, but exhibits moderate durability, typically with a service life of 5–8 years. It is readily available in stock.
2、SMP (Silicone Modified Polyester): Compared to polyester coatings, it provides enhanced weather resistance, thermal stability, and anti-aging performance. Priced higher than PE, it typically offers a service life of 10 years and requires custom production.
3、HDP (High-durability Polyester): Enhanced with ultraviolet absorbers and hindered amine light stabilizers (HALS) to achieve exceptional long-term weatherability. Priced higher than SMP coatings, it typically offers a service life of up to 15 years and is typically custom-ordered.
4、PVDF (Polyvinylidene Fluoride): Offers superior weather resistance, melt resistance, corrosion resistance, wear resistance, and UV resistance, along with excellent processability. However, it has the highest cost and limited color options. Its typical service life reaches 20 years, but it is rarely available as stock material.
Selection of Color Steel Sheet Suppliers
03 Single Steel Sheet System
On-Site Composite Roof (Wall) System
1、Panel Types and Application of Standing Seam Roof Single Panels
2、Panel Types and Application of Wall Single Panels
3、Characteristics of On-Site Composite Roof (Wall)
4、Metal Insulated Sandwich Wall Panels and Roof Panels System
Panel Types of Standing Seam Roof Single Panels
Roof Outer Panel Models
180° standing seam
360° standing seam
Structure of On-Site Composite Roof
Evolution of Single-Layer Roof Panel Lap Joint Methods
Engagement Process Analysis
Roofing Accessories
Panel Types of Wall Single Panels
Wall Outer Panel Models
Structure of On-Site Composite Wall (Vertical Arrangement)
Structure of On-Site Composite Wall (Horizontal Arrangement)
Characteristics of On-Site Composite Roof (Wall)
1.Multiple construction processes: At least three processes (installing outer panels, insulation layers, and inner panels) are required.
2.Roof single panels can be roll-formed on-site, allowing flexible control of panel length.
3.Most wall single panels are fixed with exposed self-tapping screws; the exterior appearance and waterproof performance are inferior to prefabricated insulation panels.
4.Glass wool rolls are compressed at purlins, reducing insulation performance.
5.The corrugated effect of single-layer wall panels has a strong industrial style, with a less integrated appearance than factory-prefabricated panels.
6.To improve the wind resistance of single-layer wall panels, additional self-tapping screws are required, leading to excessive nail holes and easy corrosion.
On-site Composite System Demonstration
On-site Roof Profiling Machine
On-site Composite Wall (Vertical Installation)
On-site Composite Wall (Horizontal Installation)
04 Metal-faced Sandwich Roof(Wall) Panel
Metal Insulated Sandwich Wall and Roof Panel System
1、Metal Roof Sandwich Panel Profiles
2、Metal Wall Sandwich Panel Profiles
3、Sandwich Composite Panel Project Applications
Rock Wool/ Fiberglass Wool Sandwich Roof Panel
Dimention：Corrugation Height: 42mm. Corrugation Pitch: 333mm. Effective Width: 1000mm
Advantage：High Structural Rigidity, Excellent Drainage Performance, Class A Fire Rating, Positive Overlapping for Tight Sealing, Rapid Installation Standard
Thickness: 50mm, 75mm, 100mm,
150mm Note: Core material: Rock Wool/ Fiberglass Wool, with polyurethane edge sealing on both sides.
PIR Sandwich Roof Panel（Exposed Fastener）
Dimention：Corrugation Height: 42mm. Corrugation Pitch: 333mm. Effective Width: 1000mm
Advantage: High structural strength with exceptional thermal insulation and energy efficiency. Fire resistance rating: B1 class (meets international engineering standards)
Standard Thickness: 50mm, 75mm, 100mm, 150mm
