Glossary – D

D.A. (Development Application): 
The plans submitted to the relevant municipal Council to seek approval for a development . Usually approved with a number of conditions attached, all of which must be met by the builder and/or the owner.

Dressed all round – timber that has been planed on all sides

Drop Edge Beam. Deepened Edge Beam, also called Thickened Edge Beam, or Stepped Edge Beam. Refers to the edge beam around the edge of the concrete slab that has been enlarged or deepened to contain filling or to provide for a level floor where cutting and filling alone will not suffice.

D.P ( Deposited Plan ) : 
A copy of a site plan held or deposited with the Land Titles Office that shows the exact bearings and dimensions of the block of land and any easements associated with it.

Damp-proof course (DPC):
A continuous layer of an impervious material placed in a masonry wall or between a floor and wall to prevent the upward or downward migration of moisture.

Dead Load:
The load assumed to arise from the structure itself

De Facto Building Line:
A line created between the front facades of existing structures located on adjoining properties. There may be separate de facto building lines for dwellings and decks/ verandahs, etc. See also (Established Building Line).

Detailed Survey: 
Prepared by a registered surveyor, these provide information that identifies existing site features i.e. Locating the residence, trees, neighbouring properties, retaining walls etc. Detailed surveys also provide information in regards to existing site levels across the site which reference back to AHD. Australian Height Datum.

Detention pit: 
A pit designed to slow down the flow of stormwater from private property into the public drainage system. Pits can be required for each individual lot or may be provided, by the land developer, for a subdivision as a whole.

Door furniture: 
All fittings on the door, except the hinges

Door jambs: 

The vertical sides of the door opening

Double Hung window: 
A window where two sashes fill the opening, and both are vertically sliding, balanced by cords and weights, springs or balances.

A line of pipes, channels or culverts normally constructed at or below ground level to carry away sewage, stormwater, surface water or ground water by gravity.

Driveway gradient: 
The maximum amount of slope that Council will permit for a driveway. These are guidelines designed to avoid builders constructing a driveway that is too steep for safety.

Dual Occupancy Development:
A development that results in 2 dwellings (whether attached or detached) on a single allotment of land

Dual water: 
A system which provides for waste water to be collected, cleansed and recycled through a secondary system of water pipes. Such water is not suitable for drinking.

Ducted exhaust fan: 
Exhaust Fans that have been connected to ducts that will take fumes to the outside of the building. Another type is a recirculating fan which recirculates room air through purifiers to remove noxious fumes – air is then returned to the room.

Large tubes used to distribute air from a central heating or air-conditioning system.

Dutch gable roof: 

A mainly pyramid shaped roof with the top portion shaped to include a triangular shaped gable portion, a combination hip and gable. The gable is placed some way up the hip not at the wall line as on a conventional gable. Dutch gables are usually smaller and generally decorative.

A room or collection of rooms occupied or used or so constructed or adapted as to be capable of being occupied or used as a separate domicile.