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Text Heights in Drawings

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 +'''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 good text height 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.
-* 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|Common Metric Structural Scales and Applications]] should be selected. This does not effect the line work, but does effect the text. This can be expressed in a simple formula:
-===Standard Metric Text Heights===+'''Scale x Text Height at 1:1 = Text height used'''
 + 
 +===Standard Metric Text Heights (1:1)===
<table cellpadding="2" cellspacing="0" width="80%"> <table cellpadding="2" cellspacing="0" width="80%">
<tr> <tr>

Revision as of 06:34, 3 June 2006

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|Common Metric Structural Scales and Applications]] should be selected. This does not effect the line work, but does effect the text. This can be expressed in a simple formula:

Scale x Text Height at 1:1 = Text height used

Standard Metric Text Heights (1:1)

Height at 1:1 Usage Pen Weight
1.8mm or 2.0mm Use sparingly and only when the standard text height just won't fit. 0.25mm
2.5mm The standard, general purpose, text height. Example: dimensions, notes etc. 0.35mm
3.5mm Secondary titles. Example: SECTION A-A. Also used in schedule or table titles. 0.5mm
5.0mm Primary titles. Example: TYPICAL FLY BRACE DETAIL 0.7mm
7.0mm Big titles, rare to use in the actual drawing space, but commonly used in cover sheet titles, or in the title block text. 1.0mm

Sample application

Image:Text Height Sample.png


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