Rooftop Solar Mounting Systems
Engineered Solutions for Industrial & Commercial Rooftops
Engineered rooftop mounting systems designed to support photovoltaic modules while ensuring roof safety, load control, and long-term durability.
Tianjin Junchuang Steel Co., Ltd. manufactures rooftop solar mounting structures for metal roofs and concrete roofs, focusing on structural safety, waterproof performance, and long-term outdoor durability.

Typical Rooftop Solar Mounting System Structure
A complete rooftop solar mounting system consists of structural profiles, support frames, connection components, and fastening hardware — engineered to work together as one system.

Application Scenarios
Designed for Commercial, Industrial, and Residential Rooftops
Systems can be designed for both new buildings and existing rooftops, including metal roofs, concrete flat roofs, and tiled residential roofs.
Structural Features
Designed for Roof Safety and Load Control
Rooftop solar mounting systems are engineered to balance structural strength with roof load limitations, ensuring safe installation without excessive roof stress.
Key structural features include:
- Lightweight steel or aluminum structural design
- Secure fixation without roof penetration (where applicable)
- Optimized layout for efficient module arrangement

System Components Overview
Engineered Components for Stable Solar Structures
A solar mounting system is not only defined by steel profiles, but by how each component works together to ensure structural stability, load transfer, and long-term outdoor performance.

Stainless Steel T-Bolt
Origin: China
Standards: GB/T 37-1988 (Standard for T-slot bolts), GB/T 3098.1-2010 (Mechanical performance of fasteners), GB/T 5782-2000 (Bolt dimensions), DIN 188 (German standard), ASME B18.5 (American standard), JIS B 1166 (Japanese standard)
Material: Stainless steel, commonly A2-70 grade
Model: M5 to M48 thread sizes
Specifications: Tensile strength ≥ 520MPa
Other: Stainless steel bolts with high corrosion resistance, commonly used for carbon steel and stainless steel materials.

Stainless Steel Tie Bar
Origin: China
Standards: GB/T 4240-2009 (Common standard in China), ASTM (American standard), JIS (Japanese standard)
Material: AISI stainless steel, commonly 304, 316, 316L
Model: 304, 316, 316L
Specifications: High corrosion resistance, suitable for welding without annealing for 316L
Other: 316 steel contains molybdenum for enhanced chloride resistance.

Stainless Steel Internal Hexagon Bolt
Origin: China
Standards: GB/T 70.1-2008, ISO 4762:2004, DIN 912
Material: Austenitic stainless steel, commonly SUS202, SUS304, SUS316
Model: M1.6 to M36 thread sizes, common models like M3×8, M4×10
Specifications: Full thread and half thread types, A2-70 or A4-70 performance grades
Other: A2-70 grade commonly used for good corrosion resistance.

Stainless Steel Base
Origin: China
Standards: ASTM A240/A240M, EN 10088-2, GB/T 3280
Material: Stainless steel, commonly 304 and 316L
Model: Custom as per design requirements
Specifications: 304 stainless steel has ≥18% chromium and ≥8% nickel for general corrosion resistance
Other: 316L contains molybdenum for enhanced chloride resistance, often used in marine or chemical fields.

Aluminum Alloy W Water Tank
Origin: China
Standards: GB/T 2518-2019
Material: Aluminum alloy, commonly 6063-T5
Model: W type, M type
Specifications: Thickness 0.5–1.2mm, width 138mm, load capacity 3.5kN/m²
Other: Customizable length, e.g., 6.6m or standard 80cm.
Aluminum Alloy Rail and Connector
Origin: China
Standards: GB/T 32182-2023, GB/T 26494-2023, GB/T 3880 series
Material: Aluminum alloy, commonly 6063-T5/T6, 6061-T6
Model: 6063-T5, 6061-T6, 5083-O
Specifications: Tensile strength ≥ 175MPa for 6063-T5, ≥ 260MPa for 6061-T6
Other: Used in lightweight rails and components for rail transportation and other structures.
Aluminum Alloy Clamps and Blocks
Origin: China
Standards: GB/T 12167-1990, GB/T 3880.3-2024
Material: Aluminum alloy, commonly 5052, 6061, 7075
Model: Custom based on application
Specifications: Good tensile strength and corrosion resistance
Other: Used in electrical work and other industrial applications.

Hot-Dip Galvanized Photovoltaic Bracket
Origin: China
Standards: JG/T 490-2016, GB/T 13912-2002
Material: Carbon structural steel, commonly Q235B
Model: Custom based on design requirements
Specifications: Corrosion protection layer thickness not less than 65 microns
Other: Surface treatment should reach rust removal level Sa2 1/2 according to GB 8923-88.

Hot-Dip Galvanized Angle Bracket
Origin: China
Standards: National standards, e.g., GB
Material: Commonly Q235B steel
Model: 5x50x(50+50)mm, 5x50x(70+50)mm, 6x80x(100+60)mm
Specifications: Hole spacing details like 11×30/13x30mm, customizable based on client drawings
Other: Products available with customized hole spacing, depending on project requirements.

Hot-Dip Galvanized Hexagon Bolt
Origin: China
Standards: GB/T 70.1-2008, DIN 912, ISO 4762, ANSI/ASME B18.3
Material: Carbon steel (e.g., Q235), alloy steel (e.g., AISI4140, 35CrMo), stainless steel (e.g., AISI304, AISI316)
Model: M6×20-8.8-HDZn
Specifications: Thread sizes from M1.6 to M36
Other: Performance grades such as 4.8, 8.8, 10.9, 12.9.

Hot-Dip Galvanized Triangle Connector
Origin: China
Standards: National standards (GB), industry norms
Material: Steel, commonly Q235B, with hot-dip galvanizing or zinc-aluminum-magnesium alloy coating for corrosion resistance
Model: Custom based on client drawings
Specifications: Standard size like 150654.0
Other: Custom-made based on application for photovoltaic brackets or building structures.
Hot-Dip Galvanized Water Tank Clamp
Origin: China
Standards: GB/T 12755-2008, GB/T 13912
Material: Q235B carbon steel
Model: Custom based on design requirements
Specifications: For galvanized steel, thickness and coating specifications apply
Other: Based on specific application needs, material and coating may vary.

Hot-Dip Galvanized Roof Hook
Origin: China
Standards: Enterprise or national standards, such as Baosteel hot-dip galvanized products
Material: Hot-dip galvanized steel or stainless steel
Model: Commonly 470 type, with customizable base height (60mm, 65mm, 75mm)
Specifications: Widths like 12.5mm or 14.5mm
Other: Suitable for metal roofing systems, customizable for height, width, and thickness.

Roof Tile Hook
Origin: China
Standards: JIS C8955:2017 (Japanese standard), or national standards like GB/T
Material: Corrosion-resistant, high-strength materials like aluminum alloy (AI6005-T5) or stainless steel (SUS304, SUS316L)
Model: Customized by manufacturer, e.g., “AHWH-WG-001”
Specifications: Span range 1.2m–3.0m, wind pressure resistance 60m/s
Other: Varies greatly based on model and manufacturer specifications.

Zinc-Aluminum-Magnesium Cable Tray
Origin: China
Standards: GB/T 13912-2020, GB/T 2518-2019, GB/T 21764-2008
Material: Steel with zinc-aluminum-magnesium coating
Model: ZM275g (zinc-aluminum-magnesium coating weight)
Specifications: Width × Height (e.g., 50×50mm, 100×100mm)
Other: Corrosion resistance up to 5000 hours in salt spray testing.

Zinc-Aluminum-Magnesium Step Plate
Origin: China
Standards: YB/T 4761-2019 (for low aluminum zinc-aluminum-magnesium), YB/T 4634-2017 (for high aluminum)
Material: SGS51D-150G, ZMA275, AZM100, AZM150
Model: Custom sizes for applications
Specifications: Thickness 0.5mm to 1.0mm, customized length
Other: Used for photovoltaic support systems and specific applications requiring corrosion resistance.

Zinc-Aluminum-Magnesium Bracket
Origin: China
Standards: T/CSTA 0077—2024, YB/T 4634-2017, YB/T 4761
Material: Zinc-aluminum-magnesium coated steel plate
Model: 4141-4162, 41522.0
Specifications: Length customizable, wall thickness 1.5-2.5mm
Other: Similar specifications as in previous bracket information.

Zinc-Aluminum-Magnesium Water Tank Sub-Support
Origin: China
Standards: National standards (GB)
Material: Q235B steel, zinc-aluminum-magnesium coating
Model: U-type, M-type
Specifications: Thickness 0.5mm to 1.0mm
Other: Used for BIPV systems or sunroom brackets.

Color Steel Roof Sheet

Hot-Dip Galvanized Triangular Connector, Purlin Connector, Base
Designed as a Complete System
Designed as a Complete Rooftop System
All rooftop components are designed to work together as a unified system, ensuring:
Roof structural safety
Installation efficiency
Long-term waterproof reliability

Customization Capability
Customization Capability
Rooftop mounting systems can be customized according to:
- Roof type and structure
- Module layout and tilt angle
- Local building codes and standards
Engineering support is provided during the project evaluation stage.

Manufacturing Facilities & Equipment
We operate advanced automated manufacturing equipment for solar mounting systems, including laser cutting and punching machines, precision welding systems, and cold roll-forming production lines.
Backed by years of manufacturing experience and continuous technical development, our engineering and production teams provide stable product quality and professional support throughout each project.












Quality Control & Shipment Inspection
Before shipment, rooftop solar mounting components undergo on-site inspection and testing to verify dimensional accuracy, coating thickness, and component compatibility.
Quality checks include
- Zinc or zinc-aluminum-magnesium coating thickness measurement
- Structural profile dimension verification
- Pre-assembly fit checks for mounting components
These inspection procedures help ensure that delivered products meet confirmed specifications and are ready for efficient on-site installation.
Project Installation & Site Acceptance
Verified Performance on Real Rooftop Projects
After delivery, rooftop solar mounting systems are installed and inspected on site
to verify structural alignment, installation accuracy, and overall system stability.




























