Boclair Academy Technical Department 1 Ortho – from a Greek word meaning ‘straight’, ‘right’ or ‘square’. Graphic – from a Greek word meaning ‘to draw’. Orthographic – means to draw looking ‘straight on’ or ‘square on’ to the object. Projection Screen To see the exact shape of a surface we must look at it ‘square on’. That is at 90 degrees or at right angles to the surface. What is Orthographic Projection?

Boclair Academy Technical Department 2 Elevation Ground LineElevation

Boclair Academy Technical Department 3 ElevationEnd Elevation Ground Line End Elevation

Boclair Academy Technical Department 4 ElevationEnd Elevation Plan Ground LinePlan

Boclair Academy Technical Department 5Summary GL ElevationEnd Elevation Plan Always draw the Elevation & End Elevation resting on the Ground Line. The Plan must always be drawn directly above the Elevation.

Boclair Academy Technical Department 6