How to Choose The Size of Corner Bracket

The core of selecting corner bracket sizes is to first determine the application scenario and load-bearing capacity, then match the thickness of the connecting materials and hole positions, and finally verify in combination with the material and installation method to ensure stable connection and suitable installation. The specific methods are as follows:

Determine core requirements and scenariosClarify the load-bearing grade: For light-duty applications (photo frames, decorative shelves), choose thin types (0.8-2.0mm); for medium-duty applications (furniture cabinets, ordinary doors and windows), choose standard types (2.0-4.0mm); for heavy-duty applications (wall cabinets, shelves, steel structures), choose thickened types (≥5.0mm).

Confirm the connecting materials: The plate thickness determines the arm length of the corner bracket. 18mm thick plates are suitable for corner brackets with an arm length of 15-20mm; for profiles, the inner groove size must be matched with an error controlled within ±0.5mm to avoid looseness.

Distinguish usage scenarios: Invisible corner brackets can be selected for furniture where concealment is important; for outdoor or humid environments, stainless steel and other corrosion-resistant materials are preferred, with a correspondingly increased thickness.

Match key dimensional parametersArm length (length of both sides of the L-shape): Small sizes (15×15mm - 25×25mm) are suitable for light-duty components; medium sizes (30×30mm - 50×50mm) are suitable for conventional furniture and doors/windows; large sizes (≥80×80mm) are suitable for heavy-duty structures.

Thickness: Directly related to load-bearing capacity. The greater the load, the thicker the thickness. For example, 1.75-1.8mm thick corner brackets for doors and windows offer good cost performance, and 2.0-3.0mm thick ones can be selected for high load-bearing scenarios.

Hole design: The hole diameter is selected according to the screw specification (common 4-10mm), and the hole distance is ≥30mm to ensure fixing strength. Slotted holes can be selected for adjustment scenarios.

Combine material and installation methodMaterial matching: Stainless steel corner brackets are suitable for outdoor and humid environments; aluminum alloy is lightweight and rust-resistant, suitable for furniture; plastic corner brackets are used for light-duty decoration.

Installation method: Choose conventional right-angle corner brackets for surface mounting, invisible corner brackets for concealed installation, and adjustable corner brackets for angle adjustment. Reserve space for screw installation to avoid interference.