A component is a constituent part of a building (or other built asset) which is manufactured as an independent unit, subsystem or subassembly, that can be joined or blended with other elements to form a more complex item. Generally, components are ‘self-contained’ and sourced from a single supplier, typically the complete unit provided by that supplier rather than its constituent parts.
A combination of components may be described as an ‘assembly’.
Where a component is a bespoke item, it may be necessary to prepare a component drawing. Where a component is an off-the-shelf-product or a commonly-used element, a component drawing may already exist that can be re-used.
Component drawings provide detailed information about the individual units. They may be drawn at large scales such as; 1:10, 1:5, 1:2, 1:1 and so on. They may include information such as component dimensions, construction, tolerances and so on. They may include references to the relevant parts of the specification providing information about materials and the minimum acceptable quality. It is important that component drawings do not duplicate information included in separate specifications as this can become contradictory and may cause confusion.
Component drawing numbers may be prefixed by the letter C.
Component range drawings describe a range of components of a similar type. Where a range of components comprise a number of standard constructions, sub-component drawings may be prepared.
Assembly drawings represent items that consist of more than one component, showing how the components fit together.
 Related articles on Designing Buildings Wiki
- As-built drawings and record drawings
- Assembly drawing.
- Concept drawing.
- Design drawings.
- Detail drawing.
- Engineering drawing.
- General arrangement drawing.
- Installation drawing.
- Scale drawing.
- Shop drawing.
- Section drawing.
- Technical drawing.
- Types of drawing.
- Working drawing.
Featured articles and news
A great example of mimetic architecture with the Fish Building of India.
Could e-bikes be a solution to congested and polluted urban centres?
Government publishes details of £500bn investment pipeline in infrastructure, described as the 'most comprehensive ever'.
Top of new skyscraper trimmed down by 30m to avoid interfering with City Airport flights.
A new concept unveiled to tackle the lack of sports facilities in inner cities.
'Open hand' designs revealed for a new entertainment complex in China.
Modernist architecture and its many international variations explained.
BRE support Europe-wide strategic heating plans for local and national authorities.
Work set to begin on 'one of America's greatest parks', which will be 10 times bigger than Central Park.
One of our most popular articles - RSHP's Mike Davies writes about the concept design process.
As Cuba mourn the death of Castro, major renovation of this symbolic landmark may be a reflection of the country's fresh start.