Good text heights makes a legible drawing. Too small, and it's difficult read. Too large, and it is a struggle to fit all the information in.
A drawing is more representable if the same text height is used. For example: all notes and dimensions should be the same height. Likewise title text should also be consistent.
In CAD environments, normally everything is drawn at 1:1. For example a plate 250mm long would be drawn, in CAD, 250mm long. However, since most items drawn are eventually presented in paper format, a suitable scale should be selected. This does not effect the line work, but does effect the text. Choosing the right one can be expressed in a simple formula:
Drawing Scale x Suitable Text Height at 1:1 = CAD Text Height
Therefore, the standard text height in a 1:10 drawing would be 25mm OR 10 x 2.5 = 25. A 1:250 drawing would use 625 high text OR 250 x 2.5 = 625. Got it?
Also selecting a suitable pen or line weight requires close attention. Half scale prints, A1 to A3 for example, are very common and too thick a pen weight would make the text illegible. Of cause this does not apply to True Type Fonts, as line weight is already built in. Examples of this would be Arial or Times New Roman fonts.
National standards bodies like ANSI, ISO, BS, JIS, AS/NZS publish documents on text height standards.
Standard Metric Text Heights (1:1)
|Height at 1:1
|1.8mm or 2.0mm
||Use sparingly and only when the standard text height just won't fit.
||The standard, general purpose, text height. Example: dimensions, notes etc.
||Secondary titles. Example: SECTION A-A. Also used in schedule or table titles.
||Primary titles. Example: TYPICAL FLY BRACE DETAIL
||Big titles, rare to use in the actual drawing space, but commonly used in cover sheet titles, or in the title block text.
Need drafting work?
We are having great success with Freelancer.com. With this website we can win all types of drafting work. People from all over the world are looking for freelancers skilled in AutoCAD, Revit, Civil 3D and Microstation, are you one of those people? If so you can live the freelancer lifestyle! and work from any location you want too. Freelancer.com, it works really well - we like it - and we believe you will too.
Looking for CAD drafters?
With modern construction, software and increased legal requirements, we often require specialized assistance with our projects. Putting skilled staff on full time is not always economically feasible for small businesses. Freelancer.com solves this problem. On this website you can engage skilled drafters. Either on fixed prices for specific tasks, or reasonably priced hourly rates for longer term contracts.
E-book: AutoCAD Block Best Practices
We draw repetitively when using AutoCAD. If we manage the drawing elements as reusable contents, it will increase our productivity significantly.
Not only can we draw faster, we can add information to our blocks. Which allows us to generate useful reports. This is what Edwins e-book entitled
AutoCAD Block Best Practices
is all about. Yes, increase your productivity with the block!