2. Door
• A hinged, sliding, or revolving barrier at the entrance to a
building, room, or vehicle, or in the framework of a
cupboard.
Types of Doors:
Doors are classified into several types, based on
• Placing of components
• Method of construction
• working operations
• Construction material used
3. Types of doors based on placing
of components:
• Based on the arrangement of door
components, the doors are classified as
following,
Battened and ledged doors:
•Battens are vertical bonds which are having
grooves are attached together by horizontal
supports called ledges General Dimensions of
batten are 100-150mm width and 20-30mm
thick.
•General dimension of ledges are 100-200mm
width and 25-30mm thick.
•This type of battened and ledged doors suitable
for narrow openings.
4. Battened, ledged and braced doors:
• To make more rigid, braces are provided
diagonally in additional to battens and
ledges as shown in figure.
• Braces are having 100-150mm width and
25-30mm thickness are preferable.
• Braces should place upwards from
handing side, then they acts as struts and
take compression.
• These type of doors can be used for wider
openings.
5. Battened, ledged and framed
doors:
• For the simple battened and ledged
door, frame work is provided in the form
of two verticals, known as stiles.
• Stiles are generally 100mm wide and as
far as thickness is concerned, the
thickness of stile should be equal to the
combined thickness of ledge and batten.
Preferably 40 mm.
6. Battened, ledged, braced and
framed doors:
• In this type, the door made up of
battens, ledges, stiles and braces. So,
it is more rigid.
• The braces are connected diagonally
between the ledges, at about 40mm
from the stiles.
7. Types of Doors based on Method of
Construction:
• Based on the method of construction, the doors are
again classified into 5 types and they are:
Framed and paneled doors:
• These are very strong and will give good
appearance when compared to battened
doors. These are the widely used doors in
almost all types of buildings.
• The panels are made up of timber or
plywood or A.C sheets or glass.
• These doors may be single leaf for narrow
openings and double leaf for wider
openings.
8. Glazed doors:
• Glazed doors are generally
provided in interior wall openings
or in hospitals, colleges etc.
• The interior of room is visible
through glazed doors and light also
passes through glazed portion of
the door.
• These may be fully glazed or
partly glazed and partly paneled .
Glass panels are provided for
glazed doors.
9. Flush doors:
• In flush doors, a solid or semi-solid
or core portion is covered on both
sides with plywood or face veneer.
Now a days these type of doors are
widely used because of good
appearance, economic, ease of
construction and greater durability.
10. There are two types of Flushed
doors:
Solid Core or Laminated Core Flush
Door
• The core part in solid core flush door
consists of core strips of timber which are
glued under high pressure condition.
Similarly in the laminated core, battens of
25mm width are glued under high pressure.
• These doors consists of wooden frame
with stiles and rails for holding the core.
• Finally plywood sheets or face veneer and
cross-bands are glued under pressure on
both side of doors.
11. Hollow core and cellular core
flush door
• In this case also stiles and rails are
provided for frame. But, a minimum
of two intermediate rails should be
provided.
• The inner space of door consists of
equally space battens of width 25mm
each. Other space is called void space
which does not exceed 40% of the
area of door.
• Here also face veneer and cross-
bands are glued under high pressure
12. Louvered doors:
• The louvers permit natural
ventilation when the door is closed
and also provide privacy in the room.
• These are generally used for toilets
of residential and public buildings.
• The door may be fully louvered or
partly louvered.
• Louvers are made up of timber or
glass or plywood and these may be
either fixed or movable
13. Wire gauged doors:
• Wire gaged doors permits natural
ventilation and restrict the entry of
flies, mosquitoes, insects etc.. These
doors are commonly used in hotels,
restaurants and for cup boards
containing eatables.
14. Types of Doors based on
Working Operations:
• The doors are classified on the
basis of working operations as:
Revolving doors:
• Revolving doors are only
provided in public buildings like
museums, banks, libraries etc.,
because of constant visitors. It
consists mullion at its center to
which four radiating shutters are
attach
15. Sliding doors:
• In this type, with the help of
runners and guide rails the
door slides to the sides. The
door may have one or more
sliding shutter depending up
on the opening available.
16. Swing doors:
• In this case, the shutter is attached to frame by
double action spring which helps the shutter to move
inwards as well as outwards.
17. Collapsible steel doors:
• Collapsible steel doors are
generally used for workshops,
sheds, warehouses etc.. It acts
like a steel curtain which will
opened or closed by horizontal
pull or push. Vertical double
channel units of (20x10x2 mm)
are spaced at 100 to 120 mm
thick and are braced flat iron
diagonals 10 to 20mm wide and
5mm thick.
18. Rolling steel shutter doors:
• Rolling steel shutter doors are
commonly used for warehouses,
garages, shops etc.. These are very
strong and offer proper safety to the
property. The door consists frame,
drum and a shutter of thin steel plate
inter locked together. A horizontal
shaft is provided in the drum which
helps to open or close the shutter.
19. Types of Doors based on
Materials:
• Doors are made up of wood, glass,
metals. Wood doors are already
discussed in the 1t classification and
glass doors are nothing but glazed
doors. Types of Metals doors are
described below.
Mild steel sheet doors:
• The door frame is made up of angle
or T-sections.
• Shutter is made up of frame of
angle of iron, having 2 verticals at
least 3 horizontal.
• Mild steel plates are welded to the
shutter frame.
21. Hollow metal doors:
• Hollow steel sections are used to
make these doors. The rails and stiles
etc., are strengthened by welding
small T or I sections inside.
22. Metal covered plywood doors
• This type of door is a composite
construction of hollow metal door and
wood door.
• The door is encased in tight fitting
sheet metal, having tightly folded
joints to exclude air so that the core
of the door does not ignite. So, it acts
as fire proof