What line width where?


What line width (or weight), do I use where, when structural drafting? In CAD, what color should I draw my structural elements. What line definitions suit what application? Below is a basic list which provide answers to these questions.
This article should be read in conjunction with the article: Standard colors and line weights in CAD.

Drawing Location
Application
Weight
Color
Linetype
Grid
Grid lines
0.18mm
Magenta
Center
Footing Plan
Proposed footings
0.5mm
Red
Continuous
Slab Plans
Outlines
0.5mm
Red
Continuous
Slab Plans
Wall under
0.18mm
Magenta
Hidden
Slab Plans
Slab underside
0.35
Yellow
Hidden
Slab Plans
Reinforcement
0.7mm
Green
Continuous
Slab Plans
Control Joint
0.35mm
Yellow
Dashed Dot
Slab Plans
Isolation or Construction Joint
0.7mm
Green
Dashed Dot
Steel Framing
Bracing
0.35mm
Yellow
Dashed Dot
Steel Framing
Purlins
0.25mm
White
Continuous
Steel Framing
Main Steel members
0.7mm
Green
Continuous
Steel Framing
Secondary Steel members
0.35mm
Yellow
Continuous
Details
Concrete outlines
0.5mm
Red
Continuous
Details
Reinforcing bars
0.35mm
Yellow
Continuous
Details
Reinforcing mesh
0.25mm
White
Hidden
Details
Steelwork outline
0.35mm
Yellow
Continuous
Details
Steelwork hidden
0.25mm
White
Hidden
DetailS
Masonry
0.25mm
White
Continuous
Details
Masonry hidden
0.18mm
Magenta
Hidden
Details
Indicative architectural items
0.18mm
Grey
Continuous
Details
Waterproofing Membranes
0.25mm
White
Hidden
Details
Timber
0.25mm
White
Continuous



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