Engineering
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Drawings or Plans are a set of two-dimensional diagrams or drawings used to describe a place or object, or to communicate building or fabrication instructions.

What it means[]

The term Drawings may casually be used to refer to a single view, sheet, or drawing in a set of plans. More accurately, plan refers to an orthographic projection looking down on the object, such as in a plan view, floor plan or bird's-eye view.

How done[]

Usually plans are drawn or printed on paper, but they can take the form of a digital file.

Plans are often referred to as "blueprints" or "bluelines". However, the terms are rapidly becoming an anachronism, since most copies of plans that were formerly made using a chemical-printing process that yielded graphics on blue-colored paper or, alternatively, of blue-lines on white paper, have been superseded by more modern reproduction processes that yield black or multi colour lines on white paper.

Reprsentation[]

Firstly[]

Plans are often for technical purposes such as architecture, engineering, or planning. Their purpose in these disciplines is to accurately and unambiguously capture all the geometric features of a site, building, product or component.

Secomdly[]

Plans can also be for presentation or orientation purposes, and as such are often less detailed versions of the former.

Thirdly[]

The end goal of plans is either to portray an existing place or object, or to convey enough information to allow a builder or manufacturer to realize a design.

Naming[]

The process of producing plans, and the skill involved, is often referred to as technical drawing.

Format[]

Plans are often prepared in a set. The set includes all the information required for the purpose of the set, and may exclude views or projections which are unnecessary. A set of plans can be on standard office-sized paper or on large sheets.

Scale[]

Plans are usually scale drawings, meaning that the plans are drawn at specific ratio relative to the actual size of the place or object.

Views and projections[]

Because plans represent three-dimensional objects on a two-dimensional plane, the use of views or projections is crucial to the legibility of plans. Each projection is achieved by assuming a vantage point from which to see the place or object, and a type of projection.

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