Best Mending Plates for Trusses: Top Repair Plates for Wood Roof Trusses
Mending plates for trusses provide strong, durable joints in wood framing, helping restore structural integrity where beams or joints have softened, cracked, or aged. This guide highlights five highly compatible plates ideal for repairing or reinforcing wooden roof trusses and frames. Each product is evaluated by material, thickness, hole pattern, and corrosion resistance to help you choose the right option for domestic, workshop, or hobby projects. The selections emphasize steel construction, appropriate thickness, and compatibility with common screw sizes used in residential framing.
| Product | Brand | Material / Finish | Size |
|---|---|---|---|
| 6 Pack 11″ x 2″ Black Flat Mending Plate | MOUNTAIN_ARK Store | Carbon steel with powder coating | 11″ x 2″, 11 gauge |
| 10 Pack 5″ x 1-7/8″ Black Flat Mending Plate | MOUNTAIN_ARK Store | Carbon steel with black sandblasting | 5″ x 1-7/8″, 1/8″ thick |
| Shimeyao 100 Pcs 2×4 Inch Pronged Truss Mending Plates | Shimeyao Store | Carbon steel, galvanized | 2″ x 4″, 1 mm thick, 8 mm teeth |
| 8 Pack 10-7/8″ x 2″ Stainless Steel Mending Plate | MOUNTAIN_ARK Store | 201 stainless steel, brushed | 10-7/8″ x 2″, 1.9 mm |
6 Pack 11″ x 2″ Black Flat Mending Plate
The 11″ x 2″ flat mending plate from Mountain Ark Store provides a robust solution for wood-to-wood joints in truss repairs. Constructed from carbon steel with a durable powder coating, this plate offers corrosion resistance and a long service life in typical indoor or sheltered outdoor environments. The 11 gauge thickness provides substantial shear strength, and the central hole pattern aligns with common fasteners used in residential framing. It suits larger repair jobs where a single plate can cover a wide joint, reducing install time.
Key features: flat mending plate, carbon steel, powder coated finish, 11″ length, 2″ width, 11 gauge thickness, center hole spacing 1-1/8″. The set includes six plates, enabling multiple repair points across a single truss or additional projects. This plate is compatible with standard wood screws and can stabilize sagging or cracked joints when properly anchored into framing members.
10 Pack 5″ x 1-7/8″ Black Flat Mending Plate
This 10-pack set features straight plates made of carbon steel with a black sandblasted finish, delivering solid corrosion resistance and a clean look. Measuring 5″ x 1-7/8″ and 1/8″ thick, these plates include six countersunk holes for secure fastening with included 201 stainless steel screws. The plate geometry is well-suited for smaller-to-medium scale joints in trusses, rafters, or furniture repair where a discreet repair piece is desired. The included screws help streamline installation in wooden frameworks.
Considerations: appropriate for medium-span joints; ensure screw diameter (3/16″) fits existing holes; compatible with standard wood screws; provides even distribution of load along the joint. The kit’s screw assortment simplifies procurement and reduces project delays.
Shimeyao 100 Pcs Pronged Truss Mending Plates
This bulk package includes 100 pronged truss plates designed for roofing and timber connectors. Each plate measures 2″ x 4″ with a 1 mm thickness and 8 mm high nail teeth, offering a strong grip for timber-to-timber connections. The galvanized finish adds rust resistance, suitable for outdoor exposure or humid environments. These plates are ideal for larger restoration projects, where multiple joints require reinforcement across a roof truss system or timber frame.
Key attributes: 2 x 4 inches, galvanized carbon steel, 1 mm thick, 8 mm nail teeth, durable and rust-resistant. The high quantity makes it convenient for builders and contractors handling multiple truss connections, or for long-term maintenance cycles where spare plates are prudent.
8 Pack 10-7/8″ x 2″ Stainless Steel Mending Plate
This set provides eight stainless steel straight brackets with a 10-7/8″ length and 2″ width, crafted from 201 stainless steel with a brushed finish. The plates have a thickness of 1.9 mm and include 12 mounting holes across the surface, compatible with M5 or M4 screws. The stainless construction offers excellent corrosion resistance, making these plates suitable for exposed or highly humid environments. They are well-suited for longer joint spans in timber frames where rigidity and durability are priorities.
Buying Guide
When choosing mending plates for trusses, consider the following factors to ensure the best performance for your project:
- Material and finish: Carbon steel plates offer high strength but may require protective coatings for moisture-prone environments. Stainless steel resists corrosion but comes at a higher price and weight. Galvanized options balance cost and corrosion resistance for outdoor use.
- Size and gauge: Thicker gauges (e.g., 11 gauge) provide greater shear strength, ideal for load-bearing joints, while thinner plates suit smaller repairs. Match the plate size to the joint area to avoid overhang or insufficient coverage.
- Hole pattern and screw compatibility: Ensure hole spacing and quantity align with standard fasteners used in your project. Check screw diameter compatibility with the included screws or your preferred hardware (wood screws vs. machine screws).
- Quanity vs. project scale: Bulk packs are cost-effective for multiple joints or ongoing maintenance. For a single repair, a smaller pack may suffice.
- Application environment: Indoor framing tolerates standard plates; exterior roofing or humid environments benefit from galvanized or stainless steel to resist rust.
- Installation method: Accurate alignment and pre-drilling of screw holes help prevent wood splitting. Use appropriate pilot holes and ensure plates sit flush against the timber surface.
- Long-term considerations: For structural trusses, it may be prudent to consult building codes or a structural professional to confirm the correct plate type, thickness, and fastener requirements for your region and project.
These options provide a mix of sizes, materials, and finishes to match common truss applications in American households and workshops. Evaluate the joint dimensions, load expectations, and exposure conditions to determine which plate best aligns with your repair strategy and safety standards.