Skruplater

Skruplater are flat metal plates with multiple screw holes used to reinforce joints and distribute loads in woodworking and light metal constructions. They are designed to connect two or more parts, such as timbers or panels, by transferring shear and withdrawal forces away from the wood fibers. Common materials include galvanised steel and stainless steel, with various coatings to improve durability and corrosion resistance.

Variants and common uses include corner plates, tie plates, backer plates, and general purpose flat plates. Plates come in different sizes and hole patterns, some with countersunk holes for flush mounting and others with open or slotted holes to allow adjustability. They are widely used in furniture making, cabinetry, shelving, framing, and renovation work where additional joint strength is required without complex joinery.

Installation considerations involve proper alignment and fastening. The plate should be positioned to cover the joint adequately, and screws should be driven into each member with appropriate length and thread type. Pre-drilling may be necessary to prevent timber splitting. Screw selection depends on the material and plate design; using screws that are too long or too short can compromise strength. In structural applications, loading requirements and building codes may dictate specific plate types and fastening patterns.

Limitations include potential limitations in high-load or dynamic applications, where specialized connectors or engineering input may be needed. Skruplater are typically used as supplementary reinforcement rather than primary load-bearing connections. They offer a relatively simple, cost-effective method to improve joint stiffness and durability in a wide range of carpentry and DIY projects.