Line thicknesses in structural plans

[BauTomTom]

Hi

is there a code or a document with recommendations which line thickness shall be used for structural plans by different sections for concrete, reinforcement, bricks, steel and etc.

for example a concrete drawing when you cut through a column base, the edge will be shown as thick line

but when if you use the same section to indicate the reinforcement (which will be shown as thick line) is the cutting edge of the concrete column base still a thick line?

I listen some typical detail in the attached PDF. Would appreciate it if somebody could tell me some standards or a reference to a document or a book

BauTomTom

 

[Ron]

Check "Architectural Graphics Standards". Not sure if later versions cover this, but at one time it was covered.

In general, it's personal preference and clarity. I try to use different line widths in an effort to clarify what I'm trying to depict; whether it is reinforcing, accessories, components or other.

I don't know of any specific standards aimed at structural engineering.

 

[hokie66]

You might want to check one of the drafting forums for advice. The last time I did any drawing, and that was before much CAD was around, we used 4 pen sizes: 0.25, 0.35, 0.50, and 0.70. The object lines, dimension lines, centre lines, etc. were 0.25. The reinforcing bars and steel beams 0.35. Lettering 0.50. Sheet borders 0.70. But as Ron said, a lot was left to judgment as to how things could be most clearly shown.

 

[dik]

The four pen sizes noted increase in diametre by approx the root of two, giving them the appearance of doubling the weight of a dot/or solid square. These are common from 50 or more years ago, my Rapidograph and other drafting pens had the same sizes.

There are a few drafting standards that stipulate the line weights for colours, the AIA, and CSA, fro example. Hokie has summed the general linework.

Dik

 

[prex]

Check the standard ISO 128 "Technical drawings -- General principles of presentation" Part 20 "Basic conventions for lines".
It states that line thicknesses must be chosen among the values (mm):0.13, 0.18, 0.25, 0.35, 0.50, 0.70, 1.00, 1.40, 2.00, but only three of them, in the ratii 4:2:1 , may be used in the same drawing.
There are no rules on what and where to draw with different thicknesses,it's a matter of clarity of presentation.

prex

http://www.xcalcs.com

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http://www.megamag.it

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http://www.levitans.com

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[BauTomTom]

---to Ron---

I have actually a very nice book “building constructions and graphic standards” it has all sorts of graphic standards but just not this one here


---to Prex---

Ouu this sounds good. I will look for it


---dik and Hokkie---

I mean this was really few years ago, maybe we shoudl use our new possibillities of AutoCAD

 

[hokie66]

BTT,
Old dogs...but you just asked about line thickness, and that is the same whether the drafting is manual or CAD.

 

[hokie66]

By the way, the CAD drawing you attached shows one of the reasons I hate CAD produced drawings...you can never get the drafters to show the hidden lines correctly...look at all those gussets which are unbroken where they are behind the truss members.