ENGINEERING Using British Standards BRITISH STANDARDS The British

ENGINEERING Using British Standards

BRITISH STANDARDS The British standard is an agreed way of doing something. Benefits Everyone understand Consistency in all drawings Same symbols

LINE TYPES Construction Outline Hidden Centre Folding Cutting Plane

EXAMPLE OF USING LINE TYPES What do you imagine the of version of this Elevation to look like? Elevation

EXAMPLE OF USING LINE TYPES What do you imagine the of version of this Elevation to look like? Elevation End Elevation

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. 50 35 30 60

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. Ø 60 + 40 Ø 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. 5 R 1 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 1. 2. Sketch the drawing below. Dimension the drawing using British Standards.