1. E NGINEERING Using British Standards

2. B RITISH S TANDARDS The British standard is an agreed way of doing something. Benefits Everyone understand Consistency in all drawings Same symbols

3. L INE T YPES Construction Outline Hidden Centre Folding Cutting Plane

4. L INE T YPES Construction Outline Hidden Centre Folding Cutting Plane

5. E XAMPLE OF USING LINE TYPES What do you imagine the of version of this Elevation to look like? Elevation

6. E XAMPLE OF USING LINE TYPES What do you imagine the of version of this Elevation to look like? Elevation End Elevation

7. E XAMPLE OF USING LINE TYPES What if a centre line is added?

8. E XAMPLE OF USING LINE TYPES What if a centre line is added?

9. D IMENSIONING -C HAIN 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. 201550 110

10. D IMENSIONING – P ARALLEL 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. 30 35 50 60

11. + D IMENSIONING - C IRCLES 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.

12. D IMENSIONING – A RC ’ S /C URVES 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. A Radius can only be given when it is an arc/ curve not a circle R15

13. D IMENSIONING – A NGLES 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°

14. D IMENSIONING 1. Sketch the drawing below. 2. Dimension the drawing using British Standards.