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3-Hole Strut Corner Plate
3-Hole Strut Corner Plate
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3-Hole Strut Corner Plate
Build a strong, clean 90-degree connection between two sections of strut channel. This flat corner plate bridges the joint with three mounting points, helping keep adjoining channel securely aligned while creating a professional-looking finished assembly.
The Hot Dip Galvanized finish is an excellent choice for solar racking, outdoor equipment supports and other permanent installations where dependable, long-term corrosion protection matters.
Why You’ll Love It
- Clean 90-degree connections — joins perpendicular strut channels in the same plane
- Three-point attachment — helps create a secure, well-aligned corner joint
- Made for outdoor projects — Hot Dip Galvanized for durable corrosion protection
- Simple installation — works with standard strut nuts and compatible bolts
Outdoor structures need hardware that can stand up to rain, condensation and changing weather. Hot dip galvanizing creates a heavy, bonded zinc coating that protects the underlying steel and provides substantially greater long-term corrosion resistance than basic zinc plating.
That makes this plate especially well suited to solar racking, exposed equipment frames and permanent outdoor supports. You get a durable connection with less concern about premature surface corrosion—and fewer reasons to revisit the assembly later.
A Simple Way to Build Better Corners
This plate lies flat across the face of two strut channels meeting at a 90-degree corner. Two mounting holes fasten along one section of channel, while the third secures the adjoining section.
The result is a clean, straightforward connection without needing to position a formed angle behind the assembly. It is especially useful for rectangular frames, wall-mounted supports, equipment racks and other structures where the channel faces remain in the same plane.
Made for Long-Term Use
Hot dip galvanizing does more than add a surface coating. During the galvanizing process, zinc bonds with the steel to create multiple protective alloy layers beneath an outer zinc layer. This durable coating helps protect the plate throughout years of outdoor service.
Zinc also provides sacrificial protection around minor scratches and exposed edges. For the best complete assembly, pair this plate with strut channel, spring nuts, bolts and other fittings selected for the same installation environment.
Specifications
| Product Type | Flat strut corner splice plate |
| Configuration | 90-degree L-shaped plate |
| Mounting Holes | 3 round holes |
| Overall Dimensions | 3-1/2″ × 3-1/2″ (88.9 × 88.9 mm) |
| Material | Steel |
| Finish | Hot Dip Galvanized |
Suggested Uses
- Solar racking and panel-support structures
- Outdoor equipment frames
- Rectangular strut frames and support assemblies
- Pipe, conduit and cable-support systems
- Wall-mounted utility and mechanical installations
Frequently Asked
Why is Hot Dip Galvanized a good choice for outdoor strut assemblies?
Hot dip galvanizing produces a heavy zinc coating that is metallurgically bonded to the underlying steel. This gives the plate durable protection against rain, condensation and other environmental exposure.
The zinc also provides sacrificial protection. If a small area becomes scratched or exposed during installation, the surrounding zinc continues helping protect the underlying steel. This makes Hot Dip Galvanized hardware a dependable choice for permanent outdoor structures where long service life and reduced maintenance are important.
How is Hot Dip Galvanized different from Zinc Plated?
Both finishes use zinc to protect steel, but Hot Dip Galvanized hardware receives a much heavier protective coating. The steel is immersed in molten zinc, creating bonded zinc-alloy layers beneath the outer zinc surface.
Zinc Plated hardware is a practical, economical option for dry indoor and sheltered installations. For solar racking, outdoor equipment supports and structures with regular exposure to moisture, Hot Dip Galvanized provides greater long-term corrosion protection and is generally the better investment.
Why can the galvanized finish look slightly uneven?
Hot Dip Galvanized hardware may have a duller, more textured or less uniform appearance than smooth Zinc Plated hardware. These natural variations result from the heavier galvanizing process and do not indicate a defect.
The important advantage is the substantial protective zinc coating beneath that surface. For outdoor support hardware, long-term corrosion resistance is usually far more valuable than a perfectly uniform cosmetic finish.
What type of connection is this plate designed for?
It joins two pieces of strut channel that meet at a 90-degree corner in the same plane. The plate mounts across the front of the joint, with two holes positioned along one channel and the third hole over the adjoining channel.
Is this a bent 90-degree angle bracket?
No. This is a flat L-shaped corner plate. It connects channel sections across the face of a corner rather than wrapping around the inside or outside of the joint. If your channel sections meet on different planes, a formed angle fitting may be more appropriate.
Does it include strut nuts or bolts?
No. This listing is for the corner plate only. Strut nuts and bolts are available separately, allowing you to select the thread size and hardware length appropriate for your channel and application.
Should I use all three mounting holes?
Yes. The plate is designed to be secured at all three mounting points. Using all three holes provides the intended alignment and support across the corner connection.
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