The following Standards identify the recommended
lettering requirements/geometry to be used on
BS EN ISO 3098-0 TPD - Lettering - General
BS EN ISO 3098-2 TPD - Lettering - Latin
alphabet, numerals and marks
BS EN ISO 3098-3 TPD - Lettering - Greek
BS EN ISO 3098-4 TPD - Lettering -
Diacritical and particular marks for the Latin
BS EN ISO 3098-5 TPD - Lettering -CAD
lettering of the Latin alphabet, numerals and
BS EN ISO 3098-6 TPD - Lettering - Cyrillic
The standards provide detailed lettering dimensions
and methods of identifying the text used.
The text is identified by a nominal outside hieght
size (h). The preferred text sizes are
listed as used are (in millimetres )
Note; I am using commas as the decimal marking in my
attempt to adhere to the new BS ISO requirements...)
For lower case letters the letter height (height of
say "a" ) = 10 / 14 x h. The
height of the tail (on say g) is 4/14 x h and the
lower case stem (on say h) = 4 /14 x h.
The line thickness is set at 1/14 x h. A typical
designation of the lettering used on a drawing is ISO
3098- BVL - 5
B is lettering type ( A, B,
V is Vertical ( Can be S
L is Latin Font ( Can be G =
Greek , or C=Cyrillic)
5 is the nominal size.
Note: The A and B types are intended for lettering
drawing using stencils or tracing from a graphed
lettered sheet. The CA and CB are for CAD
I have checked out the ISOCP.shx font that comes with
Autocad 14 and it seems to conform pretty well with
the Font in the standards above for the Latin font.
I include below this note a set of Latin
characters drawing using IntelliCaD Professional with
the isocp.shx font.
Note: This is confirmed by the ISO link below which
provides a full set of downloadable fonts for
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Roy Beardmore passed away on 9th March 2013. He is sadly missed. This website, Roymech, has been an invaluable resource for engineers around the world and we hope to maintain this incredible legacy going forward.