HINGES Hinges are mechanical bearings that connect two objects, allowing a limited range of rotational movement between them. They are most commonly used to attach doors, windows, lids, or gates to a frame, enabling them to swing open or close. Hinges come in many different types, designs, and materials, depending on the specific use and load-bearing requirements. Common Types of Hinges: Butt Hinge: Commonly used on doors, these are two rectangular metal plates joined by a central pin. One plate is attached to the door and the other to the frame. Piano Hinge (Continuous Hinge): A long, continuous hinge that runs the full length of a door or lid, providing even support along the edge. It is often used for pianos (hence the name), furniture, and toolboxes. Concealed Hinge: These are hidden from view when the door is closed, often used in modern cabinetry to give a sleek, seamless appearance. Spring Hinge: Contains a spring mechanism that automatically closes the door after it has been opened, used in doors that need to close by themselves (e.g., fire doors). T-Hinge: Shaped like the letter "T", these are commonly used for gates, barns, and sheds, where one side of the hinge is longer to provide additional support. Pivot Hinge: These hinges allow a door to pivot from the top and bottom, rather than being attached to the side. They are often used in heavy or glass doors. Strap Hinge: These are long, decorative hinges used on gates, barn doors, and large furniture. They are also functional in supporting heavier doors. Materials: Stainless steel: Corrosion-resistant and durable. Brass: Aesthetic, often used in decorative or indoor applications. Aluminum: Lightweight and resistant to rust. Iron: Sturdy and often used in outdoor or industrial settings. Hinges are chosen based on their strength, aesthetic appeal, and functionality.