A framework of wood, steel, aluminium, glass or a combination of these materials secured in an opening left in a wall for providing access to users of the structures is what we call doors. It basically is divided in two parts
1 A Frame
2 Shutter ( leaf )
The frame is normally made of timber. This is on account of fact that timber is easily available everywhere and most importantly it can be worked into different shapes without any difficulty. But when your main concern is economy, frames made up of steels and precast R.C.C. members generally used. Steel or R.C.C. Frames are also recommended on construction sites infested with termites.
