Strut channels, often called channel struts or Unistrut-type channels, are standardized structural framing systems used in electrical, mechanical, and construction industries. They are designed to provide quick, reliable, and flexible support for conduits, pipes, ducts, and heavy equipment. One of the most important aspects to understand when working with strut channels is their sizes, since different projects and load requirements call for specific dimensions. Below is a detailed breakdown.
📏 Standard Strut Channel Sizes
Width Options
- 41 mm (1-5/8″)
- The most common and widely used size worldwide.
- Compatible with a vast range of fittings and accessories.
- Serves as the “universal” option for electrical, mechanical, and solar applications.
- 21 mm (13/16″)
- Known as a narrow series.
- Suitable for lighter loads such as small cable trays, wiring supports, and light-duty HVAC installations.
- 75–100 mm (3″–4″)
- Wide/heavy series channels.
- Used for heavy racking, industrial shelving, and seismic bracing where higher strength is needed.
Height (Depth) Options
- 21 mm (13/16″) → Shallow channel for light-duty installations.
- 41 mm (1-5/8″) → Standard depth, the industry’s most versatile size.
- 62 mm (2-7/16″) → Deep channel for heavier loads.
- 82 mm (3-1/4″) → Extra-deep channel, offering maximum rigidity and strength.
Thickness Options
- 1.5 mm (16 gauge) → Light-duty use.
- 2.0 mm → Standard strength for most applications.
- 2.5 mm – 3.0 mm (12–13 gauge) → Heavy-duty projects where structural strength is critical.
These thicknesses allow engineers to balance load capacity against weight and cost.
Length Options
- Standard Lengths:
- 3 m (10 ft)
- 6 m (20 ft)
- Custom Lengths:
- Many suppliers cut channels to exact project requirements, reducing waste and installation time.
🔩 Strut Channel Profiles
Strut channels are manufactured in several profile variations:
- Plain (Solid) Channel – A simple open profile without holes; maximum strength.
- Slotted Channel – Pre-slotted for easy adjustment and alignment during installation.
- Back-to-Back Channel – Two channels welded together for increased rigidity and load capacity.
- Shallow Channel – Reduced depth design, compact and suited for space-constrained applications.
- Specialty Shapes – Curved channels, half-slot designs, and reinforced sections for unique project needs.
📊 Example Size Table – 41 mm (1-5/8″) System
| Channel Type | Width (mm / in) | Height (mm / in) | Thickness (mm) | Typical Use Case |
|---|---|---|---|---|
| Shallow Channel | 41 (1-5/8″) | 21 (13/16″) | 1.5–2.5 | Cable support, light-duty conduits |
| Standard Channel | 41 (1-5/8″) | 41 (1-5/8″) | 1.5–3.0 | General-purpose framing, electrical & HVAC |
| Deep Channel | 41 (1-5/8″) | 62 (2-7/16″) | 2.0–3.0 | Heavy-duty pipe supports, solar arrays |
| Extra Deep Channel | 41 (1-5/8″) | 82 (3-1/4″) | 2.5–3.0 | Industrial racking, seismic bracing |
⚙️ Applications by Size
- Shallow Channels (21 mm)
- Cable tray supports
- Junction box mounting
- Light conduit runs
- Standard Channels (41 mm)
- Electrical conduit installations
- HVAC ducting and air-conditioning supports
- Solar panel racking systems
- Light mechanical equipment
- Deep & Extra-Deep Channels (62–82 mm)
- Industrial machinery mounting
- Pipe and sprinkler system supports
- Solar farm structures
- Seismic and vibration-resistant frameworks
- Wide/Heavy Series (75–100 mm)
- Industrial shelving
- Warehouse racking systems
- Structural reinforcement in factories and large facilities
🛠️ Why Size Matters
Choosing the right size of strut channel ensures:
- Load Capacity – Larger channels with thicker walls can carry heavier loads safely.
- Stability – Deep and back-to-back profiles reduce bending and vibration.
- Flexibility – Narrow channels provide lightweight, space-saving solutions.
- Compatibility – Standard 41 mm channels fit a full range of nuts, bolts, and accessories.
Strut channels are an essential backbone of modern electrical and mechanical infrastructure. By understanding the available sizes and their intended applications, contractors, engineers, and installers can select the most efficient, cost-effective, and safe solution for their projects.
Materials and Surface Finishes
Strut channels are available in different materials and finishes depending on the environment:
- Pre-Galvanized Steel (PG) – Indoor applications.
- Hot-Dip Galvanized (HDG) – Outdoor, corrosive environments.
- Stainless Steel (304/316) – High corrosion resistance.
- Aluminum – Lightweight, non-magnetic applications.
- Black Steel – Welded or painted applications.
Conclusion – Why Work with Globebloom?
Choosing the right strut channel size ensures stability, safety, and cost-efficiency in your project. At Globebloom, we are not just a supplier — we are the factory. This means:
- Complete size range: shallow, standard, deep, extra-deep, and wide.
- Full materials & finishes (PG, HDG, stainless, aluminum, black steel).
- ISO/UL/CE certified production.
- Global supply with fast delivery.
- One-stop solution: channels + fittings + accessories.
👉 Contact Globebloom today for a free quotation and partner directly with the manufacturer.
