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What line width where?

September 19, 2020 Leave a Comment

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 LocationApplicationWeightColorLinetype
GridGrid lines0.18mmMagentaCenter
Footing PlanProposed footings0.5mmRedContinuous
Slab PlansOutlines0.5mmRedContinuous
Slab PlansWall under0.18mmMagentaHidden
Slab PlansSlab underside0.35YellowHidden
Slab PlansReinforcement0.7mmGreenContinuous
Slab PlansControl Joint0.35mmYellowDashed Dot
Slab PlansIsolation or
Construction Joint
0.7mmGreenDashed Dot
Steel FramingBracing0.35mmYellowDashed Dot
Steel FramingPurlins0.25mmWhiteContinuous
Steel FramingMain Steel members0.7mmGreenContinuous
Steel FramingSecondary Steel members0.35mmYellowContinuous
DetailsConcrete outlines0.5mmRedContinuous
DetailsReinforcing bars0.35mmYellowContinuous
DetailsReinforcing mesh0.25mmWhiteHidden
DetailsSteelwork outline0.35mmYellowContinuous
DetailsSteelwork hidden0.25mmWhiteHidden
DetailsMasonry0.25mmWhiteContinuous
DetailsMasonry hidden0.18mmMagentaHidden
DetailsIndicative architectural items0.18mmGreyContinuous
DetailsWaterproofing Membranes0.25mmWhiteHidden
DetailsTimber0.25mmWhiteContinuous

Filed Under: Drafting Standards, Structural Drafting

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