If you’re working on a construction, electrical, or mechanical project that requires a reliable, adjustable support framework, metal strut channel is probably the component you need. It’s one of the most versatile building materials in the industrial world — used everywhere from data centers and warehouses to hospitals and manufacturing plants.
In this guide, we’ll walk you through everything you need to know about metal strut channel systems: what they are, how they work, the different types available, and how to choose the right one for your project.
What Is Metal Strut Channel?
Metal strut channel — also called strut framing, unistrut channel, or simply strut — is a standardized steel (or sometimes aluminum or stainless steel) structural channel used to support pipes, conduit, cable trays, and mechanical equipment. Its defining feature is a slotted or solid opening along the face that accepts channel nuts, enabling fasteners to be positioned anywhere along the channel’s length without drilling.
This adjustability is what makes metal strut so popular. Instead of pre-drilling anchor points into walls or ceilings, you can slide a fitting into any position and lock it down. That makes installation faster, changes easier, and the overall system more flexible over time.
What Are the Common Applications for Metal Strut?
Metal strut channel is used across a broad range of industries and applications:
- Electrical installations: Supporting conduit, cable trays, junction boxes, and electrical panels
- Mechanical/plumbing systems: Hanging pipes, HVAC ducts, and gas lines
- Industrial equipment support: Creating frames, equipment mounts, and machine bases
- Rooftop installations: Supporting solar arrays, HVAC equipment, and signage
- Seismic bracing: Providing lateral restraint for piping and conduit in earthquake zones
- Data centers: Organizing and supporting cable management systems
Steinco Industrial Solutions carries a full line of metal strut products through Unistrut and Flex-Strut, two of the most trusted names in the industry.
What Types of Metal Strut Channel Are Available?
By Profile Size
Standard metal strut channel comes in three main profile sizes, each suited to different load requirements:
- 1-5/8″ x 1-5/8″ (P1000 series): The most widely used standard channel, ideal for general-purpose applications with moderate loads
- 1-5/8″ x 3-1/4″ (P5000 series): Deeper channel offering greater rigidity for heavier loads and longer spans
- 13/16″ x 1-5/8″ (P6000/P7000 series): Lighter-duty channel for smaller applications where space is limited
- 1-1/4″ x 1-1/4″ (A1000 series): Compact channel commonly used for lightweight electrical and cable support
By Material and Finish
- Pre-galvanized steel: Zinc-coated for corrosion resistance — the standard choice for most indoor installations
- Hot-dip galvanized: Heavier zinc coating for outdoor or high-humidity environments
- Stainless steel: Superior corrosion resistance for food processing, pharmaceutical, and coastal applications
- Plain/unfinished steel: Typically painted or coated on-site for specific aesthetic or performance requirements
By Slot Configuration
- Solid back: Maximum strength, used when back-to-back installations are needed
- Back-to-back (T-slot): Two channels welded together for use as structural columns or beams
- Slotted: Features long slots for added flexibility in positioning
How Do Metal Strut Fittings Work?
The power of metal strut systems lies in the fitting ecosystem. A channel nut — either with or without a spring — drops into the channel slot and turns 90 degrees to lock in place. You then attach any compatible fitting: angle brackets, pipe clamps, beam clamps, hangers, post bases, and more.
Steinco carries a comprehensive selection of Unistrut fittings for the 1-5/8″ metal framing series, 1-1/4″ series, and 13/16″ series, as well as the complete Flex-Strut fitting range.
What’s the Difference Between Unistrut and Flex-Strut?
Both are metal strut channel systems, but they have distinct differences:
- Unistrut is the original brand and the most widely specified system in North America. Its slot dimensions and fitting dimensions have become the de facto industry standard.
- Flex-Strut offers a broader range of channel profiles and specialty products, including the unique Flex-Wrap and Flex-Angle products that allow curved and angular installations not possible with standard rigid channel.
Steinco carries both systems. You can browse the full Unistrut product line and the Flex-Strut product line on our site, or contact our team for help selecting the right system for your project.
How Do You Choose the Right Metal Strut for Your Project?
When selecting metal strut channel, consider these factors:
- Load requirements: Calculate the total load — including safety factors — to select the appropriate profile depth and gauge
- Span length: Longer spans require deeper channels or additional intermediate supports
- Environment: Indoor, outdoor, corrosive, or food-grade environments each require different finishes
- Attachment method: Determine whether you need to anchor to concrete, steel structure, or hang from overhead
- Code requirements: Seismic zones, electrical codes (NEC), and local building codes may dictate the system configuration
Frequently Asked Questions About Metal Strut
Can metal strut be used outdoors?
Yes — with the right finish. Hot-dip galvanized or stainless steel channels are designed for outdoor use. Standard pre-galvanized channel is suitable for protected outdoor applications but may show surface oxidation over time in exposed environments.
Is metal strut the same as Unistrut?
“Unistrut” is a brand name that has become synonymous with metal strut channel, similar to how “Kleenex” is used for facial tissue. Unistrut is manufactured by Atkore and is one of many compatible metal strut systems on the market. Steinco carries genuine Unistrut products as well as Flex-Strut and other compatible systems.
What gauge is standard metal strut?
The most common gauges are 12-gauge (standard duty) and 14-gauge (light duty) for the 1-5/8″ series. Heavier-gauge options are available for high-load applications.
Get Metal Strut Channel from Steinco Industrial Solutions
Steinco Industrial Solutions has been supplying metal strut channel systems for over 30 years. As a wholesale supplier with deep inventory and technical expertise, we can help you source the right channel, fittings, and hardware for any application — from a simple pipe support to a complex seismic bracing system.
Browse our full selection online or contact our team to discuss your project requirements. We serve contractors, engineers, and facility managers throughout Ohio and beyond.