ࡱ> ikbcdefgh5@ zbjbj22 "XX11111111dddd:f1.f4PA͂H  $RSj0]1011%%%`11 % %,%QR"11Rf WGduD04=<R111111R<18%0011JKd 11JKTechnical drawing From Wikipedia, the free encyclopedia Jump to:  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "column-one#column-one" navigation,  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "searchInput#searchInput" search  HYPERLINK "http://en.wikipedia.org/wiki/File:Drafter_at_work.jpg" \o "CAD Drafter at work."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Drafter_at_work.jpg/240px-Drafter_at_work.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Drafter_at_work.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/CAD_Drafter" \o "CAD Drafter" CAD Drafter at work.  HYPERLINK "http://en.wikipedia.org/wiki/File:Bundesarchiv_B_145_Bild-F038800-0010,_Wolfsburg,_VW_Autowerk.jpg" \o "Copying technical drawings in 1973"  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/5/55/Bundesarchiv_B_145_Bild-F038800-0010%2C_Wolfsburg%2C_VW_Autowerk.jpg/240px-Bundesarchiv_B_145_Bild-F038800-0010%2C_Wolfsburg%2C_VW_Autowerk.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Bundesarchiv_B_145_Bild-F038800-0010,_Wolfsburg,_VW_Autowerk.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  Copying technical drawings in 1973 Technical drawing is the  HYPERLINK "http://en.wikipedia.org/wiki/Discipline" \o "Discipline" discipline of creating  HYPERLINK "http://en.wikipedia.org/wiki/Standardization" \o "Standardization" standardized  HYPERLINK "http://en.wikipedia.org/wiki/Technology" \o "Technology" technical  HYPERLINK "http://en.wikipedia.org/wiki/Drawing" \o "Drawing" drawing by  HYPERLINK "http://en.wikipedia.org/wiki/Architect" \o "Architect" architects,  HYPERLINK "http://en.wikipedia.org/wiki/CAD_drafter" \o "CAD drafter" CAD drafters,  HYPERLINK "http://en.wikipedia.org/wiki/Design_engineer" \o "Design engineer" design engineers, and related professionals. Technical drawing includes the various fields and technologies underpinning electronics, which has in turn revolutionized the art with new tools in the form of  HYPERLINK "http://en.wikipedia.org/wiki/Computer_Aided_Design" \o "Computer Aided Design" Computer Aided Design (CAD). A technical drawing or  HYPERLINK "http://en.wikipedia.org/wiki/Engineering_drawing" \o "Engineering drawing" engineering drawing is a type of  HYPERLINK "http://en.wikipedia.org/wiki/Drawing" \o "Drawing" drawing and form of  HYPERLINK "http://en.wikipedia.org/wiki/Graphic" \o "Graphic" graphic  HYPERLINK "http://en.wikipedia.org/wiki/Communication" \o "Communication" communication, used in the transforming of an  HYPERLINK "http://en.wikipedia.org/wiki/Idea" \o "Idea" idea into physical  HYPERLINK "http://en.wikipedia.org/wiki/Form" \o "Form" form. This type of drawing is used to fully and clearly define requirements for  HYPERLINK "http://en.wikipedia.org/wiki/Engineering" \o "Engineering" engineered items, and is usually created in accordance with standardized conventions for layout, nomenclature, interpretation, appearance (such as  HYPERLINK "http://en.wikipedia.org/wiki/Typeface" \o "Typeface" typefaces and line styles), size, etc. The process of creating a technical drawing is called drafting or technical drawing. A person who does drafting is known as a  HYPERLINK "http://en.wikipedia.org/wiki/Drafter" \o "Drafter" drafter. In some areas this person may be referred to as a drafting technician, draftsperson, or draughtsperson. A technical drawing differs from a common drawing by how it is interpreted. A common drawing can hold many purposes and meanings, while a technical drawing is intended to concisely and clearly communicate all needed specifications of a created object or objects. Contents [ HYPERLINK "javascript:toggleToc()" hide]  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Overview#Overview" 1 Overview  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "History#History" 2 History  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Fields_of_technical_drawing#Fields_of_technical_drawing" 3 Fields of technical drawing  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Types_of_technical_drawings#Types_of_technical_drawings" 4 Types of technical drawings  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Construction_drawing#Construction_drawing" 4.1 Construction drawing  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Cutaway_drawings#Cutaway_drawings" 4.2 Cutaway drawings  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Exploded_view_drawing#Exploded_view_drawing" 4.3 Exploded view drawing  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Patent_drawing#Patent_drawing" 4.4 Patent drawing  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Technical_illustrations#Technical_illustrations" 4.5 Technical illustrations  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Technical_sketches#Technical_sketches" 4.6 Technical sketches  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Manual_drafting#Manual_drafting" 5 Manual drafting  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Computer_Aided_Design#Computer_Aided_Design" 6 Computer Aided Design  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "CAD_drafters#CAD_drafters" 7 CAD drafters  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "See_also#See_also" 8 See also  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "References#References" 9 References  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "Further_reading#Further_reading" 10 Further reading  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "External_links#External_links" 11 External links [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=1" \o "Edit section: Overview" edit] Overview Technical drawing, also known as drafting, refers to the discipline of producing precise  HYPERLINK "http://en.wikipedia.org/wiki/Illustration" \o "Illustration" illustrations of things in fields like  HYPERLINK "http://en.wikipedia.org/wiki/Architecture" \o "Architecture" architecture and  HYPERLINK "http://en.wikipedia.org/wiki/Engineering" \o "Engineering" engineering. Generally, the term technical drawing pertains to any kind of drawing fashioned with technical ideas. Good examples of technical drawing are  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Mechanical_drawing&action=edit&redlink=1" \o "Mechanical drawing (page does not exist)" mechanical drawings,  HYPERLINK "http://en.wikipedia.org/wiki/Chart" \o "Chart" charts, and  HYPERLINK "http://en.wikipedia.org/wiki/Sketch" \o "Sketch" sketches. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-0#cite_note-0" \o "" [1] Technical drawings are a means of  HYPERLINK "http://en.wikipedia.org/wiki/Graphic_communication" \o "Graphic communication" graphic communication, which aims to clearly and concisely communicate information about transforming technical ideas or concepts into reality. A technical drawing often contains both a graphic representation of its subject, and dimensions, notes and specifications. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-1#cite_note-1" \o "" [2] Today the mechanics of the drafting task have been greatly accelerated through the use of  HYPERLINK "http://en.wikipedia.org/wiki/Computer-aided_design_and_drafting" \o "Computer-aided design and drafting" computer-aided design and drafting systems, but regardless of whether a draft is drawn by hand or with computer assistance, the field-use-drawing must be  HYPERLINK "http://en.wikipedia.org/wiki/Architectural_reprography" \o "Architectural reprography" reproducible with a version control system to maintain authorized and approved changes to the master document (or computer files, the modern analog). In some fields, particularly electronics, draftsmen are also known by the ambiguous " HYPERLINK "http://en.wikipedia.org/wiki/Designer" \o "Designer" designer", whose job would be distinct and separate from the  HYPERLINK "http://en.wikipedia.org/wiki/Engineer" \o "Engineer" engineers specifying and working out the design details. In short, draftsmen are communicators that are part of an engineering team charged with producing specialty documentation packaged as a design, which following the standards of the field, can be understood by others with the same training.Technical drawing in perspective is a universal picture language by which ideas and information may be readily available for others. [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=2" \o "Edit section: History" edit] History  HYPERLINK "http://en.wikipedia.org/wiki/File:Pianta_dell%27abbazia_di_san_gallo,_816-830,_san_gallo,_stiftbibliothek.jpg" \o "Plan of Saint Gall. Reichenau, early 9th century."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/Pianta_dell%27abbazia_di_san_gallo%2C_816-830%2C_san_gallo%2C_stiftbibliothek.jpg/180px-Pianta_dell%27abbazia_di_san_gallo%2C_816-830%2C_san_gallo%2C_stiftbibliothek.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Pianta_dell%27abbazia_di_san_gallo,_816-830,_san_gallo,_stiftbibliothek.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  Plan of Saint Gall. Reichenau, early 9th century. Drawing to communicate technical ideas may predate the written language. The oldest drawing instruments known, a drawing board inscripted with a temple plan, date from the 3th millennium BC from the city of  HYPERLINK "http://en.wikipedia.org/wiki/Lagash" \o "Lagash" Lagash in  HYPERLINK "http://en.wikipedia.org/wiki/Babylon" \o "Babylon" Babylon. The ancient Greeks influenced drawing through their work in geometry, and tools such as the compass and triangles used in engineering were then developed. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-Bert02-2#cite_note-Bert02-2" \o "" [3] One of few surviving medieval architectural drawings from the period between the  HYPERLINK "http://en.wikipedia.org/wiki/Fall_of_the_Roman_Empire" \o "Fall of the Roman Empire" fall of the Roman Empire and the 13th century is the  HYPERLINK "http://en.wikipedia.org/wiki/Plan_of_Saint_Gall" \o "Plan of Saint Gall" Plan of Saint Gall, an  HYPERLINK "http://en.wikipedia.org/wiki/Architecture" \o "Architecture" architectural drawing of a  HYPERLINK "http://en.wikipedia.org/wiki/Christian_monasticism" \o "Christian monasticism" monastic compound dating from the early 9th century. The Plan depicts an entire  HYPERLINK "http://en.wikipedia.org/wiki/Benedictine" \o "Benedictine" Benedictine monastic compound including churches, houses, stables, kitchens, workshops, brewery, infirmary, and even a special house for  HYPERLINK "http://en.wikipedia.org/wiki/Bloodletting" \o "Bloodletting" bloodletting. The Plan was never actually built, and was so named because it was kept at the famous medieval monastery library of the  HYPERLINK "http://en.wikipedia.org/wiki/Abbey_of_St._Gall" \o "Abbey of St. Gall" Abbey of St. Gall, where it remains to this day.  HYPERLINK "http://en.wikipedia.org/wiki/File:Design_for_a_Flying_Machine.jpg" \o "Design for a Flying Machine, Leonardo da Vinci, 1488."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/d/d4/Design_for_a_Flying_Machine.jpg/180px-Design_for_a_Flying_Machine.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Design_for_a_Flying_Machine.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  Design for a Flying Machine,  HYPERLINK "http://en.wikipedia.org/wiki/Leonardo_da_Vinci" \o "Leonardo da Vinci" Leonardo da Vinci, 1488. The beginning of contemporary technical drawing originates from 15th century renaissance artists like the Italian Architect  HYPERLINK "http://en.wikipedia.org/wiki/Filippo_Brunelleschi" \o "Filippo Brunelleschi" Filippo Brunelleschi, who in about 1415 demonstrated the geometrical method of  HYPERLINK "http://en.wikipedia.org/wiki/Perspective_(graphical)" \o "Perspective (graphical)" perspective, used today by artists, by painting the outlines of various  HYPERLINK "http://en.wikipedia.org/wiki/Florentine" \o "Florentine" Florentine buildings onto a mirror.  HYPERLINK "http://en.wikipedia.org/wiki/Leonardo_da_Vinci" \o "Leonardo da Vinci" Leonardo da Vinci further developed perspective and technical drawing, using geometric principles from famous Greek mathematicians like  HYPERLINK "http://en.wikipedia.org/wiki/Pythagoras_of_Samos" \o "Pythagoras of Samos" Pythagoras of Samos, and  HYPERLINK "http://en.wikipedia.org/wiki/Euclid_of_Alexandria" \o "Euclid of Alexandria" Euclid of Alexandria. In the 18th century the mathematician  HYPERLINK "http://en.wikipedia.org/wiki/Gaspard_Monge" \o "Gaspard Monge" Gaspard Monge developed  HYPERLINK "http://en.wikipedia.org/wiki/Descriptive_geometry" \o "Descriptive geometry" descriptive geometry, when designing a complicated fortress in a star shape using orthgraphic projection. Early 19th century isometric drawing was introduced by the Englishman William Farish. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-Bert02-2#cite_note-Bert02-2" \o "" [3]  HYPERLINK "http://en.wikipedia.org/wiki/File:Cranes_from_Encyclop%C3%A9die.jpg" \o "18th century Cranes.[4]"  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Cranes_from_Encyclop%C3%A9die.jpg/180px-Cranes_from_Encyclop%C3%A9die.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Cranes_from_Encyclop%C3%A9die.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  18th century Cranes. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-3#cite_note-3" \o "" [4] Prior to the 18th century there was no need for  HYPERLINK "http://en.wikipedia.org/wiki/Interchangeable_parts" \o "Interchangeable parts" interchangeable parts, the ability to select components for assembly at random and fit them together within proper tolerances, and acurate drawings were not necessary. Inventors, engineers and builders made each product one at a time, and each product was unique. Many designs used through the 19th century were accomplished by first completing a hand sketch of the object to build. These were then converted into  HYPERLINK "http://en.wikipedia.org/wiki/Model_(physical)" \o "Model (physical)" wooden models from which patterns were constructed . This practice followed well into the 20th century by some. One of the first efforts to create a program to  HYPERLINK "http://en.wikipedia.org/wiki/Standardization" \o "Standardization" standardize drawing and establish a mechanical drawing school came from the Franklin Institute in Philadelphia in 1824. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-4#cite_note-4" \o "" [5] The 18th century  HYPERLINK "http://en.wikipedia.org/wiki/Architectural" \o "Architectural" architectural practice technical drawing had become the normal medium for design. Architects were among the first design discipline to make use of conventions of plan, elevation and section in design and production control. It was the scale of the projects and number of crafts involved, that called for a separation between  HYPERLINK "http://en.wikipedia.org/wiki/Design" \o "Design" design and  HYPERLINK "http://en.wikipedia.org/wiki/Construction" \o "Construction" construction. By the time the  HYPERLINK "http://en.wikipedia.org/wiki/Industrial_revolution" \o "Industrial revolution" Industrial revolution began, these architectural conventions were readily available to engineers. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-5#cite_note-5" \o "" [6] Since the  HYPERLINK "http://en.wikipedia.org/wiki/Industrial_Revolution" \o "Industrial Revolution" Industrial Revolution specialized fields of engineering design have developed to meet the needs of industry. Military and  HYPERLINK "http://en.wikipedia.org/wiki/Civil_engineering" \o "Civil engineering" civil engineering were the first, from which others developed such as  HYPERLINK "http://en.wikipedia.org/wiki/Mechanical_engineering" \o "Mechanical engineering" mechanical,  HYPERLINK "http://en.wikipedia.org/wiki/Electrical_engineering" \o "Electrical engineering" electrical,  HYPERLINK "http://en.wikipedia.org/wiki/Chemical_engineering" \o "Chemical engineering" chemical,  HYPERLINK "http://en.wikipedia.org/wiki/Aerospace_engineering" \o "Aerospace engineering" aerospace  HYPERLINK "http://en.wikipedia.org/wiki/Industrial_engineering" \o "Industrial engineering" industrial engineering, and many others. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-BeWi04-6#cite_note-BeWi04-6" \o "" [7] Eventually the development of the  HYPERLINK "http://en.wikipedia.org/wiki/Computer" \o "Computer" computer had a major impact on the methods used to design and create technical drawings. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-Bert02-2#cite_note-Bert02-2" \o "" [3] [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=3" \o "Edit section: Fields of technical drawing" edit] Fields of technical drawing The field of technical drawing and drafting work is applied in many specialties, such as: HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-BLC07-7#cite_note-BLC07-7" \o "" [8]  HYPERLINK "http://en.wikipedia.org/wiki/Aeronautical" \o "Aeronautical" Aeronautical drafters: prepare engineering drawings detailing plans and specifications used in the manufacture of aircraft, missiles, and related parts.  HYPERLINK "http://en.wikipedia.org/wiki/File:Persepolis_Colonne_flandin.jpg" \o "Architectural drawings of details of the Palace of Persepolis,Persia"  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/3/35/Persepolis_Colonne_flandin.jpg/180px-Persepolis_Colonne_flandin.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Persepolis_Colonne_flandin.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/Architectural_drawing" \o "Architectural drawing" Architectural drawings of details of the Palace of  HYPERLINK "http://en.wikipedia.org/wiki/Persepolis" \o "Persepolis" Persepolis, HYPERLINK "http://en.wikipedia.org/wiki/Persia" \o "Persia" Persia  HYPERLINK "http://en.wikipedia.org/wiki/Architectural_drawing" \o "Architectural drawing" Architectural drawing: draw architectural and structural features of buildings and other structures. These workers may specialize in a type of structure, such as residential or commercial, or in a kind of material used, such as reinforced concrete, masonry, steel, or timber. Architectural drawing can include all architectural  HYPERLINK "http://en.wikipedia.org/wiki/Contract" \o "Contract" contracts and  HYPERLINK "http://en.wikipedia.org/wiki/Drawing" \o "Drawing" drawings such as  HYPERLINK "http://en.wikipedia.org/wiki/Plot_plan" \o "Plot plan" plot plans,  HYPERLINK "http://en.wikipedia.org/wiki/Floor_plan" \o "Floor plan" floor plans,  HYPERLINK "http://en.wikipedia.org/wiki/Elevation" \o "Elevation" elevations, sections, details,  HYPERLINK "http://en.wikipedia.org/wiki/Schedule" \o "Schedule" schedules, etc., and any architectural drawing that forms a part of the contract documents. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-8#cite_note-8" \o "" [9]  HYPERLINK "http://en.wikipedia.org/wiki/Civil_engineering" \o "Civil engineering" Civil drafters: prepare drawings and topographical and relief maps used in major construction or civil engineering projects, such as highways, bridges, pipelines, flood control projects, and water and sewage systems.  HYPERLINK "http://en.wikipedia.org/wiki/Electrical" \o "Electrical" Electrical drafters: prepare wiring and layout diagrams used by workers who erect, install, and repair electrical equipment and wiring in communication centers, power plants, electrical distribution systems, and buildings.  HYPERLINK "http://en.wikipedia.org/wiki/Electronics" \o "Electronics" Electronics drafters: draw wiring diagrams, circuit board assembly diagrams, schematics, and layout drawings used in the manufacture, installation, and repair of electronic devices and components.  HYPERLINK "http://en.wikipedia.org/wiki/Mechanical_engineering" \o "Mechanical engineering" Mechanical drafters: prepare drawings showing the detail and assembly of a wide variety of machinery and mechanical devices, indicating dimensions, fastening methods, and other requirements.  HYPERLINK "http://en.wikipedia.org/wiki/Process_engineering" \o "Process engineering" Process piping or  HYPERLINK "http://en.wikipedia.org/wiki/Pipeline" \o "Pipeline" pipeline drafters: prepare drawings used in the layout, construction, and operation of oil and gas fields, refineries, chemical plants, and process piping systems. Further, special fields of technical drawings, such as the drawing of  HYPERLINK "http://en.wikipedia.org/wiki/Gear" \o "Gear" gears and  HYPERLINK "http://en.wikipedia.org/wiki/Cam" \o "Cam" cams,  HYPERLINK "http://en.wikipedia.org/wiki/Welding" \o "Welding" welding,  HYPERLINK "http://en.wikipedia.org/wiki/Riveting" \o "Riveting" riveting,  HYPERLINK "http://en.wikipedia.org/wiki/Electrical_component" \o "Electrical component" electrical components and  HYPERLINK "http://en.wikipedia.org/wiki/Electronic_circuit" \o "Electronic circuit" circuits,  HYPERLINK "http://en.wikipedia.org/wiki/Piping" \o "Piping" piping, structures, and mapping and  HYPERLINK "http://en.wikipedia.org/wiki/Typography" \o "Typography" typography have evolved to support the specialized fields of engineering. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-Bert02-2#cite_note-Bert02-2" \o "" [3] [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=4" \o "Edit section: Types of technical drawings" edit] Types of technical drawings [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=5" \o "Edit section: Construction drawing" edit] Construction drawing  HYPERLINK "http://en.wikipedia.org/wiki/File:DIN_69893_hsk_63a_drawing.png" \o "Construction drawing of a Machine tool part."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/0/03/DIN_69893_hsk_63a_drawing.png/240px-DIN_69893_hsk_63a_drawing.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:DIN_69893_hsk_63a_drawing.png" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/Construction_drawing" \o "Construction drawing" Construction drawing of a  HYPERLINK "http://en.wikipedia.org/wiki/Machine_tool" \o "Machine tool" Machine tool part.  HYPERLINK "http://en.wikipedia.org/wiki/Construction_drawing" \o "Construction drawing" Construction drawing is a type of technical drawing, created within the engineering discipline, and used to fully and clearly define requirements for  HYPERLINK "http://en.wikipedia.org/wiki/Engineering" \o "Engineering" engineered items. Construction drawings are usually created in accordance with standardized conventions for layout, nomenclature, interpretation, appearance (such as  HYPERLINK "http://en.wikipedia.org/wiki/Typeface" \o "Typeface" typefaces and line styles), size, etc. Its purpose is to accurately and unambiguously capture all the geometric features of a product or a component. The end goal of an engineering drawing is to convey all the required information that will allow a manufacturer to produce that component. [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=6" \o "Edit section: Cutaway drawings" edit] Cutaway drawings  HYPERLINK "http://en.wikipedia.org/wiki/File:1942_Nash_Ambassador_X-ray.jpg" \o "Cutaway drawing of a Nash 600."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/0/06/1942_Nash_Ambassador_X-ray.jpg/210px-1942_Nash_Ambassador_X-ray.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:1942_Nash_Ambassador_X-ray.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/Cutaway_drawing" \o "Cutaway drawing" Cutaway drawing of a  HYPERLINK "http://en.wikipedia.org/wiki/Nash_600" \o "Nash 600" Nash 600. A  HYPERLINK "http://en.wikipedia.org/wiki/Cutaway_drawing" \o "Cutaway drawing" cutaway drawing is a technical illustration, in which  HYPERLINK "http://en.wikipedia.org/wiki/Surface" \o "Surface" surface elements a three-dimensional model are selectively removing, to make internal features visible, but without sacrificing the outer context entirely. The purpose of a cutaway drawing is to allow the viewer to have a look into an otherwise solid opaque object. Instead of letting the inner object shine through the surrounding surface, parts of outside object are simply removed. This produces a visual appearance as if someone had cutout a piece of the object or sliced it into parts. Cutaway illustrations avoid ambiguities with respect to spatial ordering, provide a sharp contrast between foreground and background objects, and facilitate a good understanding of spatial ordering. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-DWE03-9#cite_note-DWE03-9" \o "" [10] [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=7" \o "Edit section: Exploded view drawing" edit] Exploded view drawing  HYPERLINK "http://en.wikipedia.org/wiki/File:Gear_pump_exploded.png" \o "Gear pump exploded."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Gear_pump_exploded.png/210px-Gear_pump_exploded.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Gear_pump_exploded.png" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/Gear_pump" \o "Gear pump" Gear pump exploded. An  HYPERLINK "http://en.wikipedia.org/wiki/Exploded_view_drawing" \o "Exploded view drawing" exploded view drawing is a technical drawing of an object that shows the relationship or order of  HYPERLINK "http://en.wikipedia.org/wiki/Assembly" \o "Assembly" assembly of the various parts. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-US_PTO05-10#cite_note-US_PTO05-10" \o "" [11] It shows the components of an object slightly separated by distance, or suspended in surrounding space in the case of a three- HYPERLINK "http://en.wikipedia.org/wiki/Dimension" \o "Dimension" dimensional exploded diagram. An object is represented as if there had been a small controlled  HYPERLINK "http://en.wikipedia.org/wiki/Explosion" \o "Explosion" explosion emanating from the middle of the object, causing the object's parts to be separated an equal distance away from their original locations. An exploded view drawing can show the intended assembly of mechanical or other parts. In mechanical systems usually the component closest to the center are assembled first, or is the main part in which the other parts get assembled. This drawing can also help to represent disassembly of parts, where the parts on the outside normally get removed first. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-11#cite_note-11" \o "" [12] [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=8" \o "Edit section: Patent drawing" edit] Patent drawing  HYPERLINK "http://en.wikipedia.org/wiki/File:Wright_brothers_patent_plans_1908.jpg" \o "Wright brothers Patent drawing, 1908."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/b/ba/Wright_brothers_patent_plans_1908.jpg/210px-Wright_brothers_patent_plans_1908.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Wright_brothers_patent_plans_1908.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/Wright_brothers" \o "Wright brothers" Wright brothers  HYPERLINK "http://en.wikipedia.org/wiki/Patent_drawing" \o "Patent drawing" Patent drawing, 1908. A  HYPERLINK "http://en.wikipedia.org/wiki/Patent_drawing" \o "Patent drawing" patent drawing is a technical drawing of an  HYPERLINK "http://en.wikipedia.org/wiki/Patent" \o "Patent" patent  HYPERLINK "http://en.wikipedia.org/wiki/Invention" \o "Invention" invention, that shows the nature of the invention. The  HYPERLINK "http://en.wikipedia.org/wiki/Drawing" \o "Drawing" drawing must show every feature of the invention  HYPERLINK "http://en.wikipedia.org/wiki/Specification" \o "Specification" specified in the claims, and is required by the  HYPERLINK "http://en.wikipedia.org/wiki/Patent_office" \o "Patent office" patent office rules to be in a particular form. The applicant for a  HYPERLINK "http://en.wikipedia.org/wiki/Patent" \o "Patent" patent will be required by  HYPERLINK "http://en.wikipedia.org/wiki/Law" \o "Law" law to furnish a  HYPERLINK "http://en.wikipedia.org/wiki/Drawing" \o "Drawing" drawing of the  HYPERLINK "http://en.wikipedia.org/wiki/Invention" \o "Invention" invention whenever the nature of the case requires a  HYPERLINK "http://en.wikipedia.org/wiki/Drawing" \o "Drawing" drawing to understand the invention. This drawing must be filed with the application. This includes practically all inventions except  HYPERLINK "http://en.wikipedia.org/wiki/Composition" \o "Composition" compositions of matter or  HYPERLINK "http://en.wikipedia.org/wiki/Process" \o "Process" processes, but a drawing may also be useful in the case of many processes. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-US_PTO05-10#cite_note-US_PTO05-10" \o "" [11] The drawing must show every feature of the invention  HYPERLINK "http://en.wikipedia.org/wiki/Specification" \o "Specification" specified in the claims, and is required by the  HYPERLINK "http://en.wikipedia.org/wiki/Patent_office" \o "Patent office" patent office rules to be in a particular form. The Office specifies the size of the sheet on which the drawing is made, the type of paper, the margins, and other details relating to the making of the drawing. The reason for specifying the standards in detail is that the drawings are printed and published in a uniform style when the patent issues, and the drawings must also be such that they can be readily understood by persons using the patent descriptions. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-US_PTO05-10#cite_note-US_PTO05-10" \o "" [11] [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=9" \o "Edit section: Technical illustrations" edit] Technical illustrations  HYPERLINK "http://en.wikipedia.org/wiki/File:Drum_set.svg" \o "Illustration of a drum set."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Drum_set.svg/210px-Drum_set.svg.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Drum_set.svg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/Technical_illustration" \o "Technical illustration" Illustration of a drum set.  HYPERLINK "http://en.wikipedia.org/wiki/Technical_illustration" \o "Technical illustration" Technical illustration is the use of  HYPERLINK "http://en.wikipedia.org/wiki/Illustration" \o "Illustration" illustration to visually communicate information of a technical nature. Technical illustrations can be component technical drawings or  HYPERLINK "http://en.wikipedia.org/wiki/Diagram" \o "Diagram" diagrams. The aim of technical illustration is to generate expressive images that effectively convey certain  HYPERLINK "http://en.wikipedia.org/wiki/Information" \o "Information" information via the visual channel to the human observer. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-ViGr05-12#cite_note-ViGr05-12" \o "" [13] The main purpose of technical illustration is to describe or explain these items to a more or less nontechnical audience. The visual image should be accurate in terms of dimensions and proportions, and should provide an overall impression of what an object is or does, to enhance the viewers interest and understanding. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-13#cite_note-13" \o "" [14] Illustrative techniques are often designed in way that even a person with no technical understanding clearly understands the piece of art. The use of varying line widths to emphasize mass, proximity, and scale helped to make a simple line drawing more understandable to the lay person. Cross hatching, stippling, and other low abstraction techniques gave greater depth and dimension to the subject matter. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-ViGr05-12#cite_note-ViGr05-12" \o "" [13]  HYPERLINK "http://en.wikipedia.org/wiki/File:Architekturskizze_Verwaltungsgeb%C3%A4ude_Biel.jpg" \o "Sketch for a government building."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/3/39/Architekturskizze_Verwaltungsgeb%C3%A4ude_Biel.jpg/180px-Architekturskizze_Verwaltungsgeb%C3%A4ude_Biel.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Architekturskizze_Verwaltungsgeb%C3%A4ude_Biel.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/Sketch" \o "Sketch" Sketch for a government building. [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=10" \o "Edit section: Technical sketches" edit] Technical sketches A  HYPERLINK "http://en.wikipedia.org/wiki/Sketch" \o "Sketch" sketch is a rapidly executed freehand drawing that is not intended as a finished work. In general, a sketch is a quick way to record an idea for later use. Architect's sketches primarily serve as a way to try out different ideas and establish a composition before undertaking a more finished work, especially when the finished work is expensive and time consuming. Architectural sketches, for example, are a kind of  HYPERLINK "http://en.wikipedia.org/wiki/Diagram" \o "Diagram" diagrams. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-BoCo04-14#cite_note-BoCo04-14" \o "" [15] These sketches, like  HYPERLINK "http://en.wikipedia.org/wiki/Metaphor" \o "Metaphor" metaphors, are used by architects as a mean of communication in aiding design collaboration. This tool helps architects to abstract attributes of hypothetical provisional design solutions and summerize their complex patters, hereby enhancing the design process. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-BoCo04-14#cite_note-BoCo04-14" \o "" [15] [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=11" \o "Edit section: Manual drafting" edit] Manual drafting The basic drafting procedure is to place a piece of paper (or other material) on a smooth surface with right-angle corners and straight sidestypically a  HYPERLINK "http://en.wikipedia.org/wiki/Drafting_table" \o "Drafting table" drafting table. A sliding  HYPERLINK "http://en.wikipedia.org/wiki/Straightedge" \o "Straightedge" straightedge known as a  HYPERLINK "http://en.wikipedia.org/wiki/T-square" \o "T-square" T-square is then placed on one of the sides, allowing it to be slid across the side of the table, and over the surface of the paper.  HYPERLINK "http://en.wikipedia.org/wiki/File:Zeichenmaschine.jpg" \o "A drafting table"  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Zeichenmaschine.jpg/180px-Zeichenmaschine.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Zeichenmaschine.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  A drafting table "Parallel lines" can be drawn simply by moving the T-square and running a pencil or  HYPERLINK "http://en.wikipedia.org/wiki/Technical_pen" \o "Technical pen" technical pen along the T-square's edge, but more typically the T-square is used as a tool to hold other devices such as  HYPERLINK "http://en.wikipedia.org/wiki/Set_square" \o "Set square" set squares or triangles. In this case the draftsman places one or more triangles of known angles on the T-squarewhich is itself at right angles to the edge of the tableand can then draw lines at any chosen angle to others on the page. Modern drafting tables (which have by now largely been replaced by CAD workstations) come equipped with a parallel rule that is supported on both sides of the table to slide over a large piece of paper. Because it is secured on both sides, lines drawn along the edge are guaranteed to be parallel.  HYPERLINK "http://en.wikipedia.org/wiki/File:Technical_drawing_instruments_1.jpg" \o "Technical drawing instruments"  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Technical_drawing_instruments_1.jpg/180px-Technical_drawing_instruments_1.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Technical_drawing_instruments_1.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  Technical drawing instruments  HYPERLINK "http://en.wikipedia.org/wiki/File:ANSI_size_illustration.svg" \o "Size chart with ANSI sizes"  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/2/28/ANSI_size_illustration.svg/180px-ANSI_size_illustration.svg.png" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:ANSI_size_illustration.svg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  Size chart with ANSI  HYPERLINK "http://en.wikipedia.org/wiki/Paper_size" \o "Paper size" sizes  HYPERLINK "http://en.wikipedia.org/wiki/File:Stencils01.jpg" \o "Stencils for correct technical writing."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/e/e5/Stencils01.jpg/180px-Stencils01.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Stencils01.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  Stencils for correct  HYPERLINK "http://en.wikipedia.org/wiki/Technical_writing" \o "Technical writing" technical writing. In addition, the draftsperson uses several tools to draw curves and circles. Primary among these are the  HYPERLINK "http://en.wikipedia.org/wiki/Compass_(drafting)" \o "Compass (drafting)" compasses, used for drawing simple arcs and circles, and the:  HYPERLINK "http://en.wikipedia.org/wiki/French_curve" \o "French curve" French curve, typically a piece of plastic with complex curves on it. A  HYPERLINK "http://en.wikipedia.org/wiki/Flat_spline" \o "Flat spline" spline is a rubber coated articulated metal that can be manually bent to most curves. Drafting templates assist the draftsperson with creating recurring objects in a drawing without having to reproduce the object from scratch every time. This is especially useful when using common symbols; i.e. in the context of  HYPERLINK "http://en.wikipedia.org/wiki/Stagecraft" \o "Stagecraft" stagecraft, a lighting designer will typically draw from: the  HYPERLINK "http://en.wikipedia.org/wiki/USITT" \o "USITT" USITT standard library of lighting fixture symbols to indicate the position of a common fixture across multiple positions. Templates are sold commercially by a number of vendors, usually customized to a specific task, but it is also not uncommon for a draftsperson to create their own templates. Basic drafting system Drawing type "name"Dimensions (width X height)Drawing type "name"Dimensions (width X height)A-size8.5 by 11.0 inches 22cm by 28cmB-size11.0 by 17.0 inches 28cm by 43cmC-size17.0 by 22.0 inches 43cm by 56cmD-size22.0 by 34.0 inches 56cm by 86cmE-size34.0 by 44.0 inches 86cm by 112cmF-size44.0 by 68.0 inches 112cm by 173cmG-size68.0 by 88.0 inches 224cm by 173cmH-size88.0 by 136 inches 173cm by 345cmAs can be seen in the series, the height of the previous drawing size becomes double the height of the next size in the sequence.This basic drafting system requires an accurate table and constant attention to the positioning of the tools. A common error is to allow the triangles to push the top of the T-square down slightly, thereby throwing off all angles. Even tasks as simple as drawing two angled lines meeting at a point require a number of moves of the T-square and triangles, and in general drafting can be a time consuming process. A solution to these problems was the introduction of the mechanical "drafting machine", an application of the  HYPERLINK "http://en.wikipedia.org/wiki/Pantograph" \o "Pantograph" pantograph (sometimes referred to incorrectly as a "pentagraph" in these situations) which allowed the draftsman to have an accurate right angle at any point on the page quite quickly. These machines often included the ability to change the angle, thereby removing the need for the triangles as well. In addition to the mastery of the mechanics of drawing lines, arcs and circles (and text) onto a piece of paperwith respect to the detailing of physical objectsthe drafting effort requires a thorough understanding of geometry, trigonometry and spatial comprehension, and in all cases demands precision and accuracy, and attention to detail of high order. Although drafting is sometimes accomplished by a project engineer, architector even by shop personnel such as a  HYPERLINK "http://en.wikipedia.org/wiki/Machinist" \o "Machinist" machinistskilled drafters (and/or designers) usually accomplish the task and are always in demand to some level. [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=12" \o "Edit section: Computer Aided Design" edit] Computer Aided Design  HYPERLINK "http://en.wikipedia.org/wiki/File:Cad_crank.jpg" \o "An oblique view of a four-cylinder inline crankshaft with pistons."  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Cad_crank.jpg/180px-Cad_crank.jpg" \* MERGEFORMATINET   HYPERLINK "http://en.wikipedia.org/wiki/File:Cad_crank.jpg" \o "Enlarge"  INCLUDEPICTURE "http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" \* MERGEFORMATINET  An oblique view of a four-cylinder inline crankshaft with pistons. Today, the mechanics of the drafting task have largely been automated and accelerated through the use of  HYPERLINK "http://en.wikipedia.org/wiki/Computer_Aided_Design" \o "Computer Aided Design" Computer Aided Design systems (CAD). Computer-aided design is the use of computer technology to aid in the design and particularly the  HYPERLINK "http://en.wikipedia.org/wiki/Drafting" \o "Drafting" drafting of a part or product, including entire buildings. It is both a visual (or drawing) and symbol-based method of communication whose conventions are particular to a specific technical field. Drafting can be done in  HYPERLINK "http://en.wikipedia.org/wiki/2D_computer_graphics" \o "2D computer graphics" two dimensions ("2D") and  HYPERLINK "http://en.wikipedia.org/wiki/3D_computer_graphics" \o "3D computer graphics" three dimensions ("3D"). Drafting is the integral communication of technical or engineering drawings and is the  HYPERLINK "http://en.wikipedia.org/wiki/Industrial_arts" \o "Industrial arts" industrial arts sub-discipline that underlies all involved technical endeavors. In representing complex, three-dimensional objects in two-dimensional drawings, these objects have traditionally been represented by three projected views at right angles. [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=13" \o "Edit section: CAD drafters" edit] CAD drafters  HYPERLINK "http://en.wikipedia.org/wiki/CAD_drafters" \o "CAD drafters" CAD drafters prepare  HYPERLINK "http://en.wikipedia.org/wiki/Technical_drawings" \o "Technical drawings" technical drawings and plans, which are used to build everything from manufactured  HYPERLINK "http://en.wikipedia.org/wiki/Product" \o "Product" products such as toys, toasters, industrial machinery, and spacecraft to structures such as houses, office buildings, and oil and gas pipelines. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-BLC07-7#cite_note-BLC07-7" \o "" [8] In the past, drafters sat at drawing boards and used pencils, pens, compasses, protractors, triangles, and other drafting devices to prepare a drawing by hand. Now, most drafters use  HYPERLINK "http://en.wikipedia.org/wiki/Computer_Aided_Design_and_Drafting" \o "Computer Aided Design and Drafting" Computer Aided Design and Drafting (CADD) systems to prepare drawings. Consequently, some drafters may be referred to as CADD operators. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-BLC07-7#cite_note-BLC07-7" \o "" [8] With CADD systems, drafters can create and store drawings electronically so that they can be viewed, printed, or programmed directly into automated manufacturing systems. CADD systems also permit drafters to quickly prepare variations of a design. Although drafters use CADD extensively, it is only a tool. Drafters still need knowledge of traditional drafting techniques, in addition to CADD skills. Despite the nearly universal use of CADD systems, manual drafting and sketching are used in certain applications. HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_note-BLC07-7#cite_note-BLC07-7" \o "" [8] [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=14" \o "Edit section: See also" edit] See also  HYPERLINK "http://en.wikipedia.org/wiki/Topic_outline_of_drawing" \o "Topic outline of drawing" Topic outline of drawing  HYPERLINK "http://en.wikipedia.org/wiki/Architectural_drawing" \o "Architectural drawing" Architectural drawing  HYPERLINK "http://en.wikipedia.org/wiki/Engineering_drawing" \o "Engineering drawing" Engineering drawing  HYPERLINK "http://en.wikipedia.org/wiki/ISO_128" \o "ISO 128" ISO 128 Technical drawings -- General principles of presentation  HYPERLINK "http://en.wikipedia.org/wiki/Plan_(drawing)" \o "Plan (drawing)" Plan (drawing)  HYPERLINK "http://en.wikipedia.org/wiki/Shop_drawing" \o "Shop drawing" Shop drawing  HYPERLINK "http://en.wikipedia.org/wiki/Technical_lettering" \o "Technical lettering" Technical lettering [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=15" \o "Edit section: References" edit] References  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-0#cite_ref-0" \o "" ^  HYPERLINK "http://www.technicaldrawings.com/what_is_technical_drawing.php" \o "http://www.technicaldrawings.com/what_is_technical_drawing.php" What is Technical Drawing?. Accessed 26 feb 2009.  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-1#cite_ref-1" \o "" ^ David L. Goetsch et al. (2005). Technical Drawing. Cengage Learning, 2005.  HYPERLINK "http://en.wikipedia.org/wiki/Special:BookSources/1401857604" ISBN 1401857604. p.3. ^  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-Bert02_2-0#cite_ref-Bert02_2-0" \o "" a  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-Bert02_2-1#cite_ref-Bert02_2-1" \o "" b  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-Bert02_2-2#cite_ref-Bert02_2-2" \o "" c  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-Bert02_2-3#cite_ref-Bert02_2-3" \o "" d Gary R. Bertoline et al. (2002) Technical Graphics Communication . McGraw-Hill Professional, 2002.  HYPERLINK "http://en.wikipedia.org/wiki/Special:BookSources/0073655988" ISBN 0073655988, p.12.  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-3#cite_ref-3" \o "" ^ From Diderot and d'Alembert, Encyclopdie (1751-72).  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-4#cite_ref-4" \o "" ^ James Folkestad er al. (2001). Engineering Drawing & Design. Cengage Learning, 2001.  HYPERLINK "http://en.wikipedia.org/wiki/Special:BookSources/0766816346" ISBN 0766816346. pp 1-2.  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-5#cite_ref-5" \o "" ^ Ken Baynes, Francis Pugh (1981) The Art of the Engineer . James Clarke & Co., 1981.  HYPERLINK "http://en.wikipedia.org/wiki/Special:BookSources/0718825063" ISBN 0718825063. p.31.  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-BeWi04_6-0#cite_ref-BeWi04_6-0" \o "" ^ Gary Robert Bertoline and Eric N. Wiebe (2004). Fundamentals of Graphics Communication . McGraw-Hill Professional, 2004.  HYPERLINK "http://en.wikipedia.org/wiki/Special:BookSources/0072973137" ISBN 0072973137, p. 15. ^  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-BLC07_7-0#cite_ref-BLC07_7-0" \o "" a  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-BLC07_7-1#cite_ref-BLC07_7-1" \o "" b  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-BLC07_7-2#cite_ref-BLC07_7-2" \o "" c  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-BLC07_7-3#cite_ref-BLC07_7-3" \o "" d  HYPERLINK "http://en.wikipedia.org/wiki/Bureau_of_Labor_Statistics" \o "Bureau of Labor Statistics" Bureau of Labor Statistics.  HYPERLINK "http://www.bls.gov/oco/ocos111.htm" \o "http://www.bls.gov/oco/ocos111.htm" Occupational Outlook Handbook, 2008-09 Edition: Drafters dated:  HYPERLINK "http://en.wikipedia.org/wiki/2007" \o "2007" 2007- HYPERLINK "http://en.wikipedia.org/wiki/December_18" \o "December 18" 12-18. accessed:  HYPERLINK "http://en.wikipedia.org/wiki/2008" \o "2008" 2008- HYPERLINK "http://en.wikipedia.org/wiki/September_24" \o "September 24" 09-24.  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-8#cite_ref-8" \o "" ^  HYPERLINK "http://www.triangleofficeguide.com/real-estate-glossary.html" \o "http://www.triangleofficeguide.com/real-estate-glossary.html" Glossary of Terms. triangleofficeguide.com. Accessed 10 Feb 2009.  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-DWE03_9-0#cite_ref-DWE03_9-0" \o "" ^ J. Diepstraten, D. Weiskopf & T. Ertl (2003).  HYPERLINK "http://www.vis.uni-stuttgart.de/~weiskopf/publications/eg2003.pdf" \o "http://www.vis.uni-stuttgart.de/~weiskopf/publications/eg2003.pdf" "Interactive Cutaway Illustrations". in: Eurographics 2003. P. Brunet and D. Fellner (ed). Vol 22 (2003), Nr 3. ^  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-US_PTO05_10-0#cite_ref-US_PTO05_10-0" \o "" a  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-US_PTO05_10-1#cite_ref-US_PTO05_10-1" \o "" b  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-US_PTO05_10-2#cite_ref-US_PTO05_10-2" \o "" c  HYPERLINK "http://en.wikipedia.org/wiki/United_States_Patent_and_Trademark_Office" \o "United States Patent and Trademark Office" United States Patent and Trademark Office (2005),  HYPERLINK "http://www.uspto.gov/web/offices/pac/doc/general/" \l "drawing" \o "http://www.uspto.gov/web/offices/pac/doc/general/#drawing" General Information Concerning Patents 1.84 Standards for drawings (Revised January 2005). Accessed 13 Feb 2009.  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-11#cite_ref-11" \o "" ^ Michael E. Brumbach, Jeffrey A. Clade (2003). Industrial Maintenance. Cengage Learning, 2003  HYPERLINK "http://en.wikipedia.org/wiki/Special:BookSources/0766826953" ISBN 0766826953, p.65 ^  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-ViGr05_12-0#cite_ref-ViGr05_12-0" \o "" a  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-ViGr05_12-1#cite_ref-ViGr05_12-1" \o "" b Ivan Viola and Meister E. Grller (2005). "Smart Visibility in Visualization". In: Computational Aesthetics in Graphics, Visualization and Imaging. L. Neumann et al. (Ed.)  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-13#cite_ref-13" \o "" ^  HYPERLINK "http://www.industriegrafik.com/TIE1.htm" \o "http://www.industriegrafik.com/TIE1.htm" www.industriegrafik.com website, Last modified: Juni 15, 2002. Accessed 15 feb 2009. ^  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-BoCo04_14-0#cite_ref-BoCo04_14-0" \o "" a  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&printable=yes" \l "cite_ref-BoCo04_14-1#cite_ref-BoCo04_14-1" \o "" b Richard Boland and Fred Collopy (2004). Managing as designing. Stanford University Press, 2004.  HYPERLINK "http://en.wikipedia.org/wiki/Special:BookSources/0804746745" ISBN 0804746745, p.69.  HYPERLINK "http://en.wikipedia.org/wiki/File:Question_book-new.svg" \o "Question book-new.svg"  INCLUDEPICTURE "http://upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" \* MERGEFORMATINET This article needs additional  HYPERLINK "http://en.wikipedia.org/wiki/Wikipedia:Citing_sources" \o "Wikipedia:Citing sources" citations for  HYPERLINK "http://en.wikipedia.org/wiki/Wikipedia:Verifiability" \o "Wikipedia:Verifiability" verification. Please help  HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit" \o "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit" improve this article by adding  HYPERLINK "http://en.wikipedia.org/wiki/Wikipedia:Reliable_sources" \o "Wikipedia:Reliable sources" reliable references. Unsourced material may be  HYPERLINK "http://en.wikipedia.org/wiki/Template:Fact" \o "Template:Fact" challenged and removed. (February 2009)[ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=16" \o "Edit section: Further reading" edit] Further reading Peter J. Booker (1963). A History of Engineering Drawing. London: Northgate. Franz Maria Feldhaus (1963). The History of Technical Drawing Wolfgang Lefvre ed. (2004). Picturing Machines 1400-1700: How technical drawings shaped early engineering practice. MIT Press, 2004.  HYPERLINK "http://en.wikipedia.org/wiki/Special:BookSources/0262122693" ISBN 0262122693 [ HYPERLINK "http://en.wikipedia.org/w/index.php?title=Technical_drawing&action=edit§ion=17" \o "Edit section: External links" edit] External links  8AB7 8 > ? @ A , 0 1 2 7 8 C D N O Z \ ҤҤ󤈤w jteh>|B*UmH phsH h>|0JmH sH #jbh>|<B*UmH phsH jh>|B*UmH phsH h>|0J<mH sH #jh>|<B*UmH phsH h>|<B*mH phsH %h>|5B*CJ\aJmH phsH h>|B*mH phsH .8@ 1 N ua!s!!_!_!_!! & Fdd$If[$\$$-DIfM gd>|$-DIfM gd>| -DM gd>| -DM gd>|-DM [$\$gd>|-DM [$\$gd>|z\ IJTUbcST[\`a  Z[kl)*'³¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢h>|0JmH sH jh>|B*UmH phsH h>|5B*\mH phsH h>|B*mH phsH #jh>|<B*UmH phsH #jh>|<B*UmH phsH h>|<B*mH phsH <'(67vw~"#01RS-.uv  LMVW34;<ǸǸ/h>|0J<eh@fHq r@jh>|0JB*Uphh>|0JB*phh>|B*phh>|0JmH sH h>|B*mH phsH jh>|B*UmH phsH ;STUV^_abpqrs&'()DEGHijmn~  $%'(EFIJabde~h>|0JB*ph h>|0Jh>|0JB*phh>|B*phjh>|B*UphRaG'd7= S!!!!!!!!!!!!!!!!!! & Fdd$If[$\$ & Fdd$If[$\$~4578/ 0 1 2 : ; = > =!>!@!A!P!Q!S!T!!!!!!!!!!!!b"ɸ$jh>|0JB*UmH phsH h>|0JB*mH phsH 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