Symbol question.

[neophoible]

CAD dropping!!

HA!

Yeah, that's pretty funny. I want to remember that one. I had actually thought of that idea, but I'm glad I didn't mention it, as I had no cool/funny term for it. I probably would have just said artefact. Thanks RobDraw.

[stevsmith]

It may be where the beam ID number is to be located.

Structural fabrication companies use this for identification of beams when offloading them from lorries on-site.

[ReMark]

Why would it be necessary to indicate on a detail drawing where a beam ID number should be located?

[stevsmith]

We used to use this procedure in our steel fab shop. the guys would weld an id number to identify what beam tied in with what drawings so when the site drawings were issued all the beams were easily identified as they came off the lorry. rather than having to measure every one they would have an isometric drawing with the beam locations. the software was strucad and it could automatically assign id's

Quite simple really.

[stevsmith]

Remark,

If you have a look at the bom in this drawing you can see the id number of the beam for site. Then on the fab drawing, you can see the location its to be welded.

 

http://www.docstoc.com/docs/116768246/Tekla-Structures-drawing

 

Although this gives the actual number, with strucad the beams were individual drawings and the location was marked with a symbol where the id was to be placed. the id was the drawing number.

Hope this clarifies whet i'm poorly trying to explain,

[mdbdesign]

As far I remember customer ask for plate tags to ID steel member. Steven idea make sense

[ReMark]

Our fabricators just write the "piece mark" on both ends of each structural member by hand with some kind of paint marker that does not wash off. It can even be seen through our primer layer.

 

A piece mark is an ID number that differentiates one piece of steel from another. Some numbering systems go as far as to tell the ironworker the area, level and location of the piece of steel.

 

In my opinion the symbol shown in post #1 is not a piece mark.

[stevsmith]

Our fabricators just write the "piece mark" on both ends of each structural member .

 

Maybe the symbol just identifies the position of the piece mark and that the factory has a standard where the drawing number should be placed where that mark is shown.

[Chilidawg]

Isn't it considered a poor practice to use an unconventional symbol in a drawing with no key note as to what that symbol represents?

That's almost as bad as having a symbol in your key notes that doesn't appear anywhere in the drawing (I am occasionally guilty of that one)

[stevsmith]

Isn't it considered a poor practice to use an unconventional symbol in a drawing with no key note as to what that symbol represents?

 

Maybe they have their own pre-defined standards and a legend elsewhere on the drawing. It's a possibility, every company is different.

[ReMark]

Maybe the symbol just identifies the position of the piece mark and that the factory has a standard where the drawing number should be placed where that mark is shown.

I could see this as a possibility.

[Ski_Me]

The symbol is typically used as a reference for the location of a recessed telephone floor jack. Why it is in the structural section I cannot tell you why. But the person doing the electrical design is generally not a well versed cad person so mistakes like this one can happen. If you look at the position and location of the symbol it does not seem to reference the beam in a direct or deliberate manner. If I were you I would not concern myself with this symbol to any degree that would halt you work.