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Aluminum brace
Aluminum semi-circular trim: Applications, classification, and pricing 2026
Aluminum semicircular cable trays are a type of cable tray with a semicircular cross-section, machined from 99,5% pure aluminum alloy, specifically used to protect, cover, and neatly organize electrical wires. With an insulation capacity of 25-35 kV/mm and a lifespan of 5-10 years, this product helps limit electrical leakage, reduce the risk of impact on conductors, and save 70-80% of installation time compared to traditional in-wall wiring methods.
Aluminum semicircular trim strips are widely used in three main categories: protecting electrical wires and technical cables (accounting for 70-80% of applications); providing safety support for stairs and sloping surfaces (friction coefficient 0,6-0,8), reducing the risk of slips and falls by 70% and increasing the durability of edges and corners of floors or walls.
The product comes in 8 sizes from D30 to D120, serving a variety of needs from installing small LED lights and recessed wall sockets to main power lines for large projects. The price of aluminum semi-circular electrical conduit ranges from 100.000 to 360.000 VND/meter depending on the size (updated November 2025).
When choosing a product, customers should pay attention to six important factors: quality certificates (CO, CQ, ISO 9001:2015); minimum aluminum wall thickness of 0,8mm; scratch-free surface finish with an anodic oxide coating of 12-25 micrometers; dimensional tolerance according to EN 12020-2 standard; PE foam packaging; and a minimum 24-month warranty.
What is a semi-circular aluminum electrical conduit?
Aluminum semi-circular cable trays consist of a semi-circular surface plate and a flat base plate, machined from pure aluminum alloy with 99,5% purity. The product is used to protect, organize, and cover electrical wires, network cables, or signal cables. Thanks to its gently curved design, the tray helps prevent direct impact on the wires and reduces the risk of tripping when working on floors or walls.
Key features of the aluminum semi-circular trim:
- Specific gravity: 2700 kg / m³.
- Lifespan: 10-15 years.
- Internal cavity width: 30 – 120mm.
- Surface treatment method: Powder coating or anodizing.
- Tensile strength: 170 – 310 N/mm².
- Coefficient of thermal expansion: 23,1 × 10⁻⁶/°C.
- Operating temperature: -40 – 80°C.
- Recyclability: 100%.
What are aluminum semi-circular trim strips used for?
Thanks to its lightweight and durable aluminum alloy construction and superior insulation and corrosion resistance, aluminum semicircular profiles are used in three main applications:
- Protecting electrical wires and cabling systems (accounting for 70-80% of applications): This type of cable tray is used as a protective sheath for electrical wires, signal cables, and small conduits.Aluminum materials achieve insulation capabilities of 25-35 kV/mm, minimizing the risk of electrical leakage or physical damage to the conductors.
"The installation process for aluminum crescent-shaped cable trays takes only 20-30% of the time compared to in-wall wiring, with a screw spacing of 30-50cm to ensure stability, helping contractors save significant labor."—According to nepnhomdecors.com (2025).
- Safety support for stairs and sloping surfaces: When used as anti-slip strips, the strip's surface achieves a coefficient of friction of 0,6 – 0,8, contributing to a reduction of approximately 70% in the risk of slips and falls, according to occupational safety statistics.
- Enhance the durability of interior furnishings: The trim is used for baseboards/floors, with an impact resistance of 15-20 J/cm². This helps protect wall edges, preventing chipping and corner damage.
How many types of semi-circular aluminum trim strips are there?
Semi-circular aluminum profiles are currently available in 8 types based on the width of the inner cavity: D30, D40, D50, D60, D70, D80, D100, and D120.
| Splint code | Dimensions (WxH) | Main role | Installation area |
| D30 | 30 × 10 – 12 mm | LED strip lights, small downlights, track lights, decorative lights, recessed lights | Drywall ceiling and walls, small showroom |
| D40 | 40 × 12 – 15 mm | Long LED strip lights, recessed LED tube lights, small panel lights, power wiring for multiple lights at the same time. | Ceilings for townhouses, offices, showrooms, and shops. |
| D50 | 50 × 15 – 18 mm | Recessed wall sockets, touch switches, double/triple sockets, wall-mounted fans, wall lights, doorbells. | Living room walls, bedroom walls, hallway walls |
| D60 | 60 × 15 mm | LED cove lighting, floor sockets, floor lamps, exposed power cords along the floor and baseboards. | Flooring for living rooms, showrooms, cafes, and restaurants. |
| D70 | 70 × 20 mm | Chandeliers, pendant lights, high-power spotlights, ceiling fans, wiring multiple devices simultaneously. | High ceilings in townhouses, garden cafes, and small workshops. |
| D80 | 80 × 20 – 25 mm | Large decorative lights, high-powered ceiling fans, and a main wiring harness running from the auxiliary electrical panel to the various areas. | Townhouses with 3-5 floors, villas, boutique hotels. |
| D100 | 100 × 25 – 30 mm | Main power cord for each floor, multiple chandeliers + high-power track lights, wiring from the main electrical panel down to the large kitchen/living room. | Large living room, showroom, restaurant, multi-story building |
| D120 | 120 × 30 mm | Exposed main power lines in large construction projects, ceiling-mounted air conditioners, high-power LED floodlights, sound systems, and workshops. | Factory, car showroom, bar, hotel |
How much does a semi-circular aluminum electrical conduit cost?
Aluminum semi-circular electrical conduit is priced between 100.000 and 360.000 VND/meter (updated November 2025), specifically:
| Aluminum trim | Size | Standard length | Unit price |
| D30 | 30 × 8 mm | 2000 mm | 100.000 VND/meter |
| D40 | 40 × 12 mm | 120.000 VND/meter | |
| D60 | 60 × 15 mm | 160.000 VND/meter | |
| D70 | 50 × 15 mm | 180.000 VND/meter | |
| D80 | 80 × 15 mm | 250.000 VND/meter | |
| D120 | 120 × 27 mm | 360.000 VND/meter |
Important noteThe prices listed above are for reference only. For the most accurate pricing, please contact the distributor directly at the time of purchase.
What should you keep in mind when buying or selling aluminum trim?
When choosing aluminum trim for construction projects, customers should consider the following six factors:
- Quality Certificate: CO, CQ, and ISO 9001:2015 quality certificates from the manufacturer.
- Aluminum wall thickness: Measure with calipers, minimum 0,8 mm.
- Aluminum surface finish: Free from scratches and uniform in color. For anodized surfaces, the anodic oxide layer must have a uniform thickness of 12–25 micrometers.
- Dimensional error: The surface flatness shall not exceed 0.2 mm/m and the overall curvature shall be less than 2 mm/2 m length according to EN 12020-2.
- Shipping packaging: It has a protective PE foam wrapping.
- Warranty: A minimum of 24 months is required for standard products.
Questions related to aluminum crescent-shaped trim
Besides electrical wires, what other types of cables can be concealed by the semi-circular aluminum cable tray?
Besides electrical wires, the semi-circular aluminum cable tray can also conceal various types of cables such as internet network cables, speaker wires, signal wires, television cables, and many other types of wires. This helps to create a neater, more sophisticated, and professional space.
What factors affect the price of aluminum crescent-shaped trim strips?
The price of aluminum crescent-shaped trim strips is not fixed but depends on 5 factors, including:
- Quality of aluminum alloy used: Trim strips made from high-grade aluminum alloys (6063-T5, 5052, etc.) are more expensive due to their superior durability, excellent corrosion resistance, and stable surface against oxidation.
- Size and thickness of the splint: Trim strips with larger cross-sections require more materials and processing time, resulting in higher costs.
- Brand and manufacturer: Products from reputable suppliers are often more expensive due to guaranteed technical standards, material consistency, and clear warranty policies.
- Style and finish: Braces with unusual shapes or custom designs will have higher production costs.
- Order quantity: When purchased in bulk, the production cost per meter typically decreases, resulting in a better selling price.
What is the correct way to store aluminum crescent-shaped electrical conduit?
To ensure the durability and aesthetic appeal of the aluminum crescent-shaped electrical conduit, users should keep the following four points in mind:
- Keep the protective film intact throughout the application process: Do not remove the protective film before installation to avoid dust and dirt adhering to the adhesive surface or scratching the finished aluminum.
- Do not use corrosive chemicals: Absolutely avoid using strong cleaning solutions, detergents with high pH (>8), or solvents, as these can dull the anodized surface, reducing the lifespan and aesthetic appeal of the trim.
- Weekly cleaning with pH7 solution: When cleaning the splint surface, use a soft cloth with a neutral solution or clean water.
- Inspect and maintain the aluminum crescent-shaped electrical conduit every 3-6 months. Regular inspections should be performed to detect early signs of adhesive peeling, surface oxidation, or dust accumulation in the wiring.
What are the differences between aluminum half-moon trim and plastic or stainless steel half-moon trim?
In interior design and electrical systems, semicircular cable trays play a crucial role in protecting wires and enhancing the aesthetics of the space. However, depending on the material (aluminum, plastic, or stainless steel), each type of tray possesses different characteristics, advantages, and disadvantages. Understanding these differences helps architects, engineers, and contractors choose the most suitable tray for their project.
| Criteria | Semi-circular aluminum trim | Semi-circular plastic splint | Semi-circular stainless steel trim |
| Material | Aluminum alloy | PVC or SPC plastic | Stainless Steel AISI304 |
| Reliability | Very high, strong load-bearing capacity, high impact resistance, and corrosion resistance. | Good, suitable for indoor environments, withstands minor impacts. | Extremely high strength, excellent load-bearing capacity, chemical resistant, and highly impact resistant. |
| Longevity | 10 - 15 years | 5 - 8 years | 15 - 20 years |
| Price | Medium to high | The shortest | Tallest |
| Anticorrosion | It's fine, but it can still corrode in saltwater and strong acid environments. | On average, they are susceptible to mild chemicals. | Excellent, resistant to marine environments and chemicals. |
| Heat resistant | Good, heat resistant ~120 – 250°C | Poor, deformation >60°C | Excellent, no deformation at temperatures of ~200–500°C. |
| Beauty | Elegant and modern; available in various powder-coated colors. | Variety of colors: White, gray, cream, wood grain; plastic that easily matches interior decor. | Elegant, with a glossy or brushed finish, classy. |
| Main application | Floors, public areas, workshops, places requiring durability and aesthetics. | For homes, offices, and other locations with minimal stress, cost is a priority. | Hospitals, food factories, laboratories, high-end buildings, buildings near the sea. |
Which company distributes beautiful, durable, and versatile decorative aluminum trim strips?
Kosmos, established in 2012, is a reputable supplier of... High-quality decorative aluminum trim productsParticularly suitable for applications involving bamboo charcoal panels, faux stone plastic, and many other interior surfaces. Kosmos' aluminum trim products stand out with their superior durability, sophisticated design, and diverse range of styles, flexibly meeting the needs of projects from homes and offices to showrooms and public areas.
>>> Price list for various types of decorative aluminum trim for interior design from Kosmos:
Besides aluminum profiles, Kosmos also offers other product lines such as decorative stainless steel brace , and plastic floor trimThis helps customers easily choose a complete and integrated solution for all their projects.
For detailed product information, installation techniques, and pricing, customers can contact us directly via hotline. Phone: 0932 067 388 or visit the official Kosmos Vietnam website at kosmos.vn.
Aluminum semicircular cable trays are not only a solution for protecting electrical wires, network cables, and lighting fixtures, but also contribute to enhancing the aesthetics of interior spaces and industrial buildings. Understanding the classification, sizes, applications, and prices helps investors, architects, and contractors choose the right product, optimize costs, and ensure long-term effectiveness.
Kim Hoa As a consultant and content representative for Kosmos Vietnam, I have over 5 years of experience in the field of interior and exterior decorative materials. Kim Hoa Regularly participating in industry seminars, advising clients, and creating videos sharing knowledge about materials, they contribute to building clear, accurate, and useful website content for readers.
The information, images, and content posted on the website. Kosmos.vn The aim is to provide reference information on products, materials, and application solutions in construction, interior and exterior decoration.
The information in this article may change over time, depending on actual construction conditions, technical standards, or specific product lines. Kosmos does not guarantee that the content on this website is completely accurate or perfectly suitable for all projects or purposes.
Customers and partners should:
- For further technical advice, consult with the construction company, architect, or specialist engineer.
- Check the specifications, design, and actual usage conditions before deciding to purchase and install.
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