RY & J
CARPENTRY & JOINERY
A door is a hinged cover to an opening in a wall.
Its main function is:
• To allow access into a building.
• To allow access to other parts of a building
• To prevent outside elements such as rain and snow to enter the building. • To prevent the passage of fi re from one room to the next. • To provide a thermal and sound insulation barrier.
• To offer security and privacy.
Doors are classified according to where they are used:
• Doors used to enter a building are called external doors. • Doors used within a building are called internal doors
Doors can be further classified by their method of operation: • Hinged or swinging doors.
• Sliding doors.
• Folding doors (these are also hinged).
Door can also be named because of their construction and design: • Matchboared doors.
• Single panel doors.
• Two panel doors.
• Three panel doors.
• Four panel doors.
• Six panel doors eight panel doors.
• Flush plain doors.
• Flush with vision panel.
The following table shows the common available sizes for internal and external doors. sizes are available from most manufacturers but these will be classed as special orders.
The main types of doors used are:
Flush doors – usually internal doors, although some plywood faced ones can be manufactured for external use.
Panelled doors – can be internal or external. External doors are thicker and stronger usually contain wood panels. They are sometimes called framed doors. Batten doors – usually external unless specified for internal use. NOTE:
• Both flush doors and framed doors can include glazed or wooden panels. • Both flush doors and panelled doors can be fire doors.
Exterior door sizes
Interior door sizes
All fire doors are 44mm thick
External faces can be covered with a decorative hardwood veneer or hardboard. The hardboard type facing can be embossed to give the appearance of a panel door but generally this type of facing is supplied sanded and ready to receive a painting coat.
Hollow core doors are usually internal doors. They are very lightweight and consist of a lightweight frame which is glued together with a facing glued to it. The door derives its strength and shape from the strength of the adhesive used to glue the frame and facings.
When necessary, this type of door can be custom-made in the workshop. In those cases the frame is usually jointed or stapled together, and the facing glued and pinned to the frame.
Edging strips called lippings are also glued and pinned to the edge of the door. The top, bottom and intermediate rails incorporate small holes or vents to allow the movement of air through the door and to help disperse any trapped air with the core. Attached to the framework of the door are lock blocks and hinge blocks to accommodate the ironmongery used to fit and hang the door.
Hollow core using timber
Type of flush door has solid cores made up of solid strips or particle board such as chipboard.
These types of cores are the basis of fire-resistant doors. The solid core is an effective fire check against the passage of flames, and if the door incorporates intumescent seals it will prove to be an excellent fire door Doors which have chipboard cores also have an outer framework which supports the core. To reduce the weight of the door the core has holes running vertically up the length of the core. This type of door is usually faced with a hardwood plywood veneer to give a decorative appearance.
The edges of the door are lipped with a hardwood strip to ease...
Please join StudyMode to read the full document