Technical terms used in connection with doors and windows are discussed below (Fig. 20.1).
1. Frame
This consists of a group of members which form a support for a door or window.
2. Style
This is the outside vertical member of the shutter of a door or window.
3. Head
This is the horizontal uppermost part of a frame.
4. Sill
This is the bottom horizontal part of a window.
5. Top Rail
This is the topmost horizontal member of a shutter.
Figure 20.1 Different parts of door and window
6. Lock Rail
This is the middle horizontal member of a shutter where the locking arrangements are made.
7. Bottom Rail
This is the bottom most horizontal member of a shutter.
8. Cross Rail
This is also called as intermediate rail which is an additional horizontal rail fixed between the top and bottom rails.
9. Panel
This is the portion of the shutter enclosed between the adjacent rails.
10. Hold Fast
These are used to keep the frame of door or window in position. Three numbers of such hold fasts are fixed on each side of a door frame and two on window frames. They are of mild steel of size 30 mm × 6 mm and of 20 cm length.
11. Horn
This is a horizontal projection of head or sill of the frame beyond the vertical face of the frame. It facilitates the fixing of the frame on the wall opening and is of 10–15 cm length.
12. Shutter
The entire assembly of styles, panels and rails is known as the shutter.
13. Mullion
This is a vertical member which sub-divides a window or a door opening vertically.
14. Transom
This is a horizontal member which is used to sub-divide a window opening horizontally.
15. Louver
This is a piece of timber which is fixed in an inclined position within a frame.
16. Jamb
This is the vertical wall face of an opening which supports the frame of door and window.
17. Rebate
This is the depression or recess made inside the door frame to receive the door shutter.
18. Architrave
When doors and windows are placed flushed with the masonry, a strip of wood usually moulded or splayed is fixed around the sides closing the joint. This gives a decent appearance to the joint of the frame and masonry.
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