The British Standards Institution (BSI) puts standards in place for a variety of industries. For example:
- BS - British Standards which are prevalent in the UK
- EN - European Standards which are recognizable across the EU
- ISO - International Standards which are used throughout the world
What standards are put in place when producing an orthographic drawing?
"The BSI has set standards in working drawings that are recognised throughout the industry." BS 8888 (2006)
Some of the basic examples of standards you will need to know when it comes to making an orthographic drawing:
Some of the basic examples of standards you will need to know when it comes to making an orthographic drawing:
- Continuous thick line (---------------) this is used for the outline/ edges of a drawing where only one of the faces forming an edge can be seen (this is most commonly done using an H or 2H pencil)
- Continuous thin line (----------------) this is for projection or dimension lines (use a 4H pencil to complete this part of the drawing)
- Chain thin line (- - - - - - - - - -) these lines are used for centre lines or lines of symmetry
Standards which should be applied when adding dimensions to an orthographic drawing:
- always use millimetres on your drawings
- numbers should be written above and in the middle of the line
- arrows should be the full length of the side and not split in the middle to write dimensions
- A scale table should be added to the drawing so as the drawing can be drawn to a ratio scale