National 5 National 5 Graphic CommunicationGraphic CommunicationEXAM KNOWLEDGE

Line Types, Drawing Types, British Standards and Dimensioning

Line TypesLine Types

Line TypesLine Types

Construction

Outline

Hidden

Centre

Folding

Cutting Plane

Drawing TypesDrawing Types

2 main types of drawings:o Pictorialo Orthograhic

Orthographic – 2DOrthographic – 2D

Orthographic – 2DOrthographic – 2DIn Britain we view it in

3rd Angle Projection 3 viewsElevationEnd ElevationPlan

Extra viewsSectional True ShapeSurface Development

Pictorial - 3DPictorial - 3D

There are 4 main pictorial drawings:

o 1pt & 2pt Perspective o Isometrico Obliqueo Planometric

E D

C

B

A

PerspectivePerspective

1pt & 2pt Perspective1pt & 2pt Perspective

SketchesHorizon LineVanishing Points

IsometricIsometric

IsometricIsometric

Technical DrawingDrawn at 30ºTrue

representationShows an object

Sectioned to see internal

PlanometricPlanometric

PlanometricPlanometric

Technical drawingBase is a true

plan, rotated.Drawn at 45º/45ºOrDrawn at 30º/60ºUsed for internal

view of a room/area.

ObliqueOblique

Exam KnowledgeExam Knowledge

Expected to know...

The different pictorials.The angles of each pictorial.What each pictorial would be used for.

British StandardsBritish StandardsBritish Standards are the accepted way we apply standards to work in the industrial and commercial world.

British Standards reduce any faults or confusion that could be made when developing design based work and ensure that people can communicate clearly with each other.

It is a technical language that professional people become accustomed to using.

Sometimes the work is stamped with the Kitemark.

DimensioningDimensioning

You must know the types of Dimesnioning:

ParallelChainYou must know how to add dimensions

to:LinesCirclesAnglesCurves

Parallel DimensioningParallel Dimensioning

Datum Line

Chain DimensioningChain Dimensioning

Dimensioning a CircleDimensioning a CircleAlways use the Ǿ symbol when it is

a full circle.

Dimensioning an AngleDimensioning an Angle

63˚

Dimensioning a CurveDimensioning a CurveOnly use the R symbol to donate

an arc or curve.

Must point arrow to the centre.

R15R15

Spot 8 FaultsSpot 8 Faults There up to 10 faults in this drawing. Identify 8 of them and write what is wrong.