What is the term for the frame around a door?

The term "jamb" refers specifically to the vertical components of a door frame. These are the sides that support the door and provide stability while allowing it to swing open and closed. Jambs are crucial in ensuring that the door is correctly aligned and can function properly within the frame. They also provide a surface for the door hinges and can be designed to accommodate various styles of doors, whether they are single, double, or sliding.

Understanding the structure of door frames helps in general contracting and construction, as it is essential for installing doors correctly and ensuring they operate smoothly. The other terms related to door frames serve different purposes: the sill forms the bottom part, the lintel is the horizontal support above the door, and the header refers to the structural member above the door opening itself. Each of these components plays a role in the architecture and functionality of the door frame, but the jamb is specifically what constitutes the sides of the frame.