Using British Standards Engineering Using British Standards

British Standards The British standard is an agreed way of doing something. Benefits Everyone understands Consistency in all drawings Same symbols The British standard is an agreed way of doing something. If everyone follows the standard everyone will be able to understand what is happening. Can they give an example of British Standards that they already know about in Graphic Communication? British Standards can apply to Safety, the Environment and in our case drawings. If we draw to British Standards people throughout the world will be able to understand and read our drawings

Line Types Construction Outline Hidden Centre Folding Cutting Plane Ask students to draw their interpretation of the lines onto the board. Bring up a student to draw each one on the board.

Line Types Construction Outline Hidden Centre Folding Cutting Plane Explain the importance of line types and how we need them to be able to explain to us the shape.

Example of using line types What do you imagine the pictorial of this Elevation from an Orthographic to look like? Elevation

Example of using line types What do you imagine the pictorial of this Elevation and End Elevation from an Orthographic to look like? End Elevation Elevation

Example of using line types What if a centre line is added? What does the centre line mean?

Example of using line types What if a centre line is added?

Dimensioning -Chain Leader Lines must not touch. Arrow heads must be filled. Numbers must be on top of the line. Smaller sizes must fit underneath the overall size. 110 20 15 50

Dimensioning – Parallel Leader Lines must not touch. Arrow heads must be filled. Numbers must be on top of the line. Smaller sizes must fit underneath the overall size. 60 50 35 30

Dimensioning - Circles Centre of the circle must be marked. The arrowheads must be filled. The dimension line must run straight through the centre of the circle. The symbol Ø must be before the size. The size must be above the line. Ø60 + Ø40 Diameter’s can only be given when it is a full circle.

Dimensioning – Arc’s/Curves Centre of the circle must be marked. The arrowhead must be filled. The dimension line must run straight through the centre of the circle. The symbol R must be before the size. The size must be above the line. R15 A Radius can only be given when it is an arc/ curve not a circle

Dimensioning – Angles Leader line must not touch. The arrowhead must be filled/ The size must be inside the line. The size must have the ° symbol after it. 45°

Dimensioning Sketch the drawing below. Dimension the drawing using British Standards. Students should apply the British standards shown to this sketch. They can then come up and do it on the board.