b.Define the following parts of a door frame: i head ii horn iii rebate iv shutter (4marks) Oct./Nov. 2021

(i) Head: The head of a door frame is the top horizontal part of the frame that sits above the door opening. It is typically made of wood or metal and supports the weight of the door and any other elements above it, such as a lintel or transom.

(ii) Horn: A horn is a projecting piece of wood or metal that is built into the edge of a door frame to increase its thickness and strength. Horns are typically found on the lock side of a door frame, and they help to prevent the door from warping or splitting over time.

(iii) Rebate: A rebate is a groove or recess cut into the edge of a door frame to create a tight, flush fit between the door and the frame. Rebates are typically found on the hinge side of a door frame, and they help to prevent drafts and improve the overall seal of the door.

(iv) Shutter: A shutter is a movable panel that covers an opening in a door frame. It can be made of wood, metal or other materials. Shutters can be used for privacy, security, or to control light and ventilation. In some cases, a door can also function as a shutter, which can be opened or closed to block or allow access to a room or building.